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Advances in developing thermally conductive polymers Mater. Res. Lett. (IF 8.3) Pub Date : 2024-03-11 Jinghang Dai, Zhen Zhang, Jian Luo, Hao Ma
Polymers, with various advantages including lightweight, low cost, flexibility and ease of processing, are popular choices for thermal management in flexible electronics, photovoltaics, fuel cells,...This paper delineates the advantages and recent progress of pristine polymers with high thermal conductivity and provides significant insights on future directions in the simulations and experiment...
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Origin identification and regulation of BCC precipitation in a CoCrFeNi high entropy alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-29 Yixuan He, Yaoqing Zhang, Fan Bu, Jiaqing Sun, Chenxu Xing, Xudong Liu, Fang Yang, Jun Wang, Jinshan Li
The issue of whether CoCrFeNi is a single-phase or dual-phase high-entropy alloy (HEA) has long been in dispute. In this study, CoCrFeNi has been verified to be a dual-phase HEA composed of dendrit...
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Multiple deformation mechanisms induce high work hardening in Ti–5Al–7.5 V alloy via transformed β matrix Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-25 Sisi Xie, Zhihong Wu, Nana Chen, Mingxiang Zhu, Hao Yang, Zilong Zhang, Chuanyun Wang, Jinshan Li, Hongchao Kou
In this work, different transformed β matrix was obtained in Ti–5Al–7.5 V alloy. The alloy with equiaxed αp phase and transformed β matrix containing α′ martensite and β phase exhibits good combina...
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Design strategy of TiC reinforced heterogeneous Ti-composites with an induced slip system for achieving high strength-ductility Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-25 Longlong Dong, Yan Tang, Wendian Fan, Xiang Li, Junjie Xu, Guodong Sun, Mingjia Li, Yongqing Fu, Ahmed Elmarakbi, Lianwen Wang, Yusheng Zhang
Achieving high strength and ductility for Ti alloys and their composites has been a key objective and also a great challenge for their engineering applications. Herein, we designed TiC/(TC18 + TC4)...
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Exploring chemistry and additive manufacturing design spaces: a perspective on computationally-guided design of printable alloys Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-21 Sofia Sheikh, Brent Vela, Vahid Attari, Xueqin Huang, Peter Morcos, James Hanagan, Cafer Acemi, Ibrahim Karaman, Alaa Elwany, Raymundo Arroyave´
Additive manufacturing (AM), especially Laser Powder-Bed Fusion (L-PBF), provides alloys with unique properties, but faces printability challenges like porosity and cracks. To address these issues,...
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Natural-basalt-originated hierarchical nano porous zeolite with strong and selective gas separation capability Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-21 Kyung-Jun Hwang, M.S. Balathanigaimani, Tae Seung Choi, Sungho Jin, Soon Do Yoon, Wang Geun Shim
Nanostructured zeolite 13X, synthesized from basalt rock via alkali fusion and hydrothermal procedures, demonstrates excellent adsorption performance for light gases (CO2, CH4, N2, and H2). Its rob...Natural-basalt-originated, nanostructured zeolite has been created for strong and selective gas adsorption characteristics useful for engineering applications including energy source creation and e...
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Kink band induced β→α phase transformation in lamellar α+β Ti alloys Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-21 Xiaodong Zheng, Kaixin Sun, Yingjie Ma, Rui Yang, Shijian Zheng
Generally, deformation in Ti and Ti alloys are dominated by dislocations and deformation twins. In this work, a novel deformation band (DB) has been observed in the fully lamellar Ti-6Al-4V alloy. ...First observing the existence of kink band and unveiling the kink band induced β to α phase transformation mechanism in α+β Ti alloys.
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Enhanced strength-ductility synergy in an ultra-strong copper alloy via coherent nanoprecipitates and stress-induced twinning Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-21 Kui Jin, Jiangnan Li, Caiju Li, Qiong Lu, Zunyan Xu, Yuanqi You, Peng Gao, Liang Liu, Jianhong Yi, Jurgen Eckert
Deformation twins (DTs) and stacking faults (SFs) are rarely found in Cu-20Ni-20Mn alloy, which limits further strengthening of alloy. Here, we report ultra-strong Cu-20Ni-20Mn alloy prepared by in...The Cu-20Ni-20Mn alloy sheet exhibiting an unprecedented strength-ductility synergy has been prepared by a two-step rolling process. The ultrafine grain structure containing substantial deformation...
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Correlating microstructure recovery to rejuvenation of high-temperature creep properties in a crept single-crystal superalloy Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-15 Yunpeng Hu, Yi Ru, Xichen Zhou, Boxuan Du, Lilun Geng, Yang Cao, Fan Yang, Yanling Pei, Shusuo Li, Jian Li, Ben Chen, Ming Gu, Qingyun Xiao, Xiang Wang, Shengkai Gong
Academic debate still exists as to whether and how multi-scale microstructure recovery is linked to creep properties rejuvenation of superalloys. We propose a rejuvenation heat treatment (RHT) for ...Special creep time and plastic deformation limit determined complete rejuvenation: the first relates to phase- and dislocation-recovery, and the latter is not fixed depending on plastic deformation...
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Multistep severe plastic deformation to achieve non-rare earth bulk magnets with high α-MnBi phase content Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-15 Lukas Weissitsch, Stefan Wurster, Heinz Krenn, Andrea Bachmaier
The ferromagnetic α-MnBi phase as non-rare earth magnetic material has gained increasing interest, but the fabrication of large volumes containing a significant amount of α-MnBi is still challengin...A novel solid-state processing route consisting of multistep severe plastic deformation and magnetic field annealing is presented, which opens a new pathway for processing rare-earth free bulk magn...
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Uncovering the role of nanoscale Si particles on the thermal stability of a lamellar-nanostructured Al–1%Si alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-13 Linfei Shuai, Tianlin Huang, Tianbo Yu, Guilin Wu, Xiaoxu Huang
This study investigates particle governed thermal stability in lamellar-nanostructured Al–1.0%Si using in-situ transmission electron microscopy and post-mortem observations. Microstructural coarsen...We uncover the mechanisms by which dispersed nanoparticles govern Y-junction motion during coarsening of lamellar nanostructures, in particular the synergetic pinning from particle-decorated interc...
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Non-Schmid effects in a model refractory multi-principal element alloy: phase-field dislocation dynamics informed by atomistic simulations Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-09 Hyojung Kim, Nithin Mathew, Darby J. Luscher, Abigail Hunter
Non-Schmid effects in a representative refractory multi-principal element alloy (MPEA), MoNbTi, are investigated using molecular statics (MS) and phase field dislocation dynamics (PFDD). In additio...
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Heterogeneous structure architected by additive manufacturing: facile route towards strong and ductile steel Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-09 Yu Xuan, Jiaqiang Chang, Yao Ou, Rui Yang, Zhenbo Zhang
Here we reported a novel approach to architect heterostructure in steels with superior mechanical properties by laser powder bed fusion (LPBF). By taking advantage of intrinsic heat treatment durin...We propose a novel methodology to architect heterostructure in steels with superior properties by exploiting the interplay between molten pools and intrinsic heat treatment during LPBF.
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Recovery facilitated by interphase boundary motion circumvents recrystallization in superalloy single crystals Mater. Res. Lett. (IF 8.3) Pub Date : 2024-02-06 Hongfei Zhang, Kai Chen, Sicong Lin, Rui Fu, Bozhao Zhang, Jun Ding, Zongqiang Feng, Xiaoxu Huang, Evan Ma
Dislocation recovery lowering the driving force for recrystallization would be able to suppress the latter in Ni-based superalloy single crystals, but was believed unlikely due to their low stackin...In γ/γ′ two-phase Ni-based superalloy single crystals, dislocation recovery is achieved via an interphase-boundary motion enabled mechanism, defying the traditional wisdom of dislocation climb/cros...
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800oC-stable D022 superlattice in a NiCrFe-based medium entropy alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2024-01-31 Mei Lin, Jianlin Lu, Yiming Chen, Zhongsheng Yang, Xin Liu, Kaiwei Zhang, Zhijun Wang, Junjie Li, Jincheng Wang, Feng He
The metastable-stable transition and rapid coarsening of metastable D022 phase remains its Achilles hell, restricting the application of D022-strengthened alloys at service temperatures higher than...
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Additive manufacturing of metals and alloys to achieve heterogeneous microstructures for exceptional mechanical properties Mater. Res. Lett. (IF 8.3) Pub Date : 2024-01-30 Haoxiu Chen, Yixiao He, Soumya Sobhan Dash, Yu Zou
Metals and alloys with heterogeneous microstructures exhibit an enhanced combination of strength and ductility, compared to their counterparts with homogeneous microstructures. Additive manufacturi...Additive manufacturing offers the opportunity of creating heterogeneous microstructures that enhance the strength-ductility synergy in metals and alloys. We review generation methods, solidificatio...
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Preserving a large-scale reversible high-pressure phase under ambient conditions Mater. Res. Lett. (IF 8.3) Pub Date : 2024-01-25 Yao Tang, Jiakun Wu, Hongliang Dong, Xiaoping Ouyang, Haikuo Wang
Preserving the high pressure states and properties of large-sized materials under ambient conditions without external pressure loading devices is crucial for their practical applications. Here, we ...The high pressure states of millimeter-sized materials and the reversible high-pessure phase have been preserved within bulk diamond containers under ambient conditions.
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Synergistic coupling of Mn-doped skeleton and Mg-toughened matrix: towards a heat-resistant Al–La–Mg–Mn alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2024-01-21 Xinkui Zhang, Liejun Li, Zhi Wang, Jixiang Gao, Zhengwu Peng
Thermally stable three-dimensional (3D) skeleton coupled with the Mg-toughened matrix is employed to enhance the high-temperature strength in an Al–La–Mg–Mn alloy fabricated via laser powder bed fu...LPBF-fabricated Al–La–Mg–Mn alloy achieved outstanding high-temperature strength via boundary strengthening mechanism provide by the 3D skeleton.
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Tensile deformation dominated by matrix dislocations at intermediate temperatures revealed using in-situ EBSD in superalloys Mater. Res. Lett. (IF 8.3) Pub Date : 2024-01-16 Pengfei Qu, Wenchao Yang, Chen Liu, Jiarun Qin, Qiang Wang, Jun Zhang, Lin Liu
The traditional view holds that the dominant deformation mechanism of Ni-based single crystal superalloys at intermediate temperatures (both in tension and creep) is stacking fault shearing γ’ phas...For the first time, this work reveals the differences in the dominant deformation mechanisms between tension and tensile creep at intermediate temperatures.
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Promoting direct and ultrafast precipitation of the α phase in the metastable Ti-10V-6Cu alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2024-01-11 Shiwei Pan, Feng Qian, Shun Xu, Fei Zhang, Kai Chen, Jiayao Ying, Qunbo Fan
Direct aging of water-quenched metastable β-titanium alloys usually follows the sequence: rapid growth of ωiso and then slow transformation into α. To inhibit ωiso growth and promote α nucleation, ...
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Arc-based directed energy deposited Inconel 718: role of heat treatments on high-temperature tensile behavior Mater. Res. Lett. (IF 8.3) Pub Date : 2023-12-28 Francisco Werley Cipriano Farias, Valdemar Rebelo Duarte, João da Cruz Payão Filho, Norbert Schell, Emad Maawad, Mélanie Bordas-Czaplicki, Fabio Machado Alves da Fonseca, Jonathan Cormier, Telmo Jorge Gomes dos Santos, João Pedro Oliveira
This study evaluated the effect of dedicated heat treatments (1050°C, 1100°C, 1142°C, and 1185°C/2 h + double-aging) on the uniaxial tensile properties at elevated temperature (650°C) of Inconel® 7...Dedicated heat treatments developed for Inconel® 718 fabricated via arc plasma directed energy deposition enabled compliance with AMS 5662 requirements at elevated temperature (650°C).
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MXene-based nanomaterials for antibacterial and wound healing Mater. Res. Lett. (IF 8.3) Pub Date : 2023-12-19 Hui Li, Min Mu, Bo Chen, Lihua Zhou, Bo Han, Gang Guo
MXenes, as a new type of two-dimensional nanomaterial, have great potential for biomedical applications due to their unique structural features and excellent physicochemical properties. In recent y...This review pioneers the progress and prospects of MXenes in the field of wound healing, which is of great significance for the development of MXene-based wound dressings.
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One-step synthesis of high-entropy diborides with hierarchy structure and high hardness via aluminum-melt reaction method Mater. Res. Lett. (IF 8.3) Pub Date : 2023-12-19 Jinfeng Nie, Yating Zhi, Yong Fan, Yonghao Zhao, Xiangfa Liu
Two new high-entropy metal diborides (ZrTiVCr)B2 and (ZrTiVCrMn)B2 were successfully synthesized via a novel aluminum melt reaction method. The high-entropy diboride crystals have a hexagonal struc...This work reports that two new high-entropy metal diborides (ZrTiVCr)B2 and (ZrTiVCrMn)B2 with ultrahigh hardness have been successfully synthesized via a novel one-step synthesis method in aluminu...
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Formation of two distinct cellular structures in 316L stainless steel fabricated by micro-laser beam powder-bed-fusion Mater. Res. Lett. (IF 8.3) Pub Date : 2023-12-12 Dayong An, Yao Xiao, Xinxi Liu, Huan Zhao, Xifeng Li, Jun Chen
Micro-laser beam powder-bed-fusion (µL-PBF) technique offers the capability to fabricate metallic components with enhanced surface quality and geometrical accuracy through refinement of processing ...
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Metastable phase formation of (Mo,Cr)2AlB2 MAB phase thin films revealed by theory and experiments Mater. Res. Lett. (IF 8.3) Pub Date : 2023-12-13 P. J. Pöllmann, D. Bogdanovski, S. Lellig, P. Schweizer, M. Hans, C. Azina, S. Karimi Aghda, P. Zöll, D. M. Holzapfel, D. Primetzhofer, S. Kolozsvári, P. Polcik, J. Michler, J. M. Schneider
A (Mo0.24Cr0.76)0.40Al0.32B0.28 thin film was deposited by direct current magnetron sputtering at 600 °C substrate temperature. Analysis by X-ray diffraction, energy-dispersive X-ray spectroscopy, ...In this work, quaternary MAB phase (Mo,Cr)2AlB2 is synthesized experimentally for the first time. Its metastable formation is rationalized by density functional theory calculations.
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Multiple-stage strain hardening due to the deformation-induced martensitic transformation in additively manufactured high-entropy alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2023-12-13 Jihye Kwon, Farahnaz Haftlang, Yeon Taek Choi, Eun Seong Kim, Hyoung Seop Kim
This study investigates microstructural changes and the presence of multiple stages in strain hardening ratio (SHR) resulting from the sequential occurrence of deformation-induced martensitic trans...
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Development of a novel Ti-Nb-Au superelastic alloy with exceptionally low elastic modulus Mater. Res. Lett. (IF 8.3) Pub Date : 2023-12-03 Nicole L. Church, Ayush Prasad, Christian E.P. Talbot, Oliver G. Reed, Nicholas G. Jones
Infection is the leading cause of biomedical implant failure, making the incorporation of antibacterial elements highly desirable. However, new alloys must also possess a low elastic modulus, to pr...A novel alloy from the Ti-Nb-Au system with an exceptionally low stiffness, high strain recoverability and potential for antibacterial properties is reported. This offers extraordinary potential fo...
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On the formation and growth of grain boundary κ-carbides in austenitic high-Mn lightweight steels Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-27 Mohamed N. Elkot, Binhan Sun, Xuyang Zhou, Dirk Ponge, Dierk Raabe
The precipitation of grain boundary (GB) κ-carbides critically influences the damage-tolerance ability of high-Mn high-Al lightweight steels, particularly in harsh environments (cryogenic and H env...We originally report that grain boundary κ-carbides can result from spinodal decomposition rather than conventional heterogeneous nucleation and refute the possibility of avoiding their precipitati...
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Lightweight Co-free eutectic high-entropy alloy with high strength and ductility by casting Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-29 Shuai Feng, Shuai Guan, Xiangkui Liu, Siyuan Peng, Kewei Dong, Yang Yang, Xinsheng Chen, Yuzheng Liang, Qipeng Wang, Yanfang Liu, Yong Peng, Kehong Wang, Wen Chen, Jian Kong
We report a cast light-weight dual-phase eutectic high-entropy alloy (EHEA) of Ni49Fe28Al17V6 that comprises of alternating FCC and ordered B2 lamellae. Such lamellar EHEA exhibits a superior tensi...A novel cast Ni49Fe28Al17V6 eutectic high-entropy alloy comprised of FCC and B2 nanolamellae exhibits a remarkable combination of tensile strength and uniform elongation, well surpassing those of o...
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Achieving superior high-temperature mechanical properties in Al-Cu-Li-Sc-Zr alloy with nano-scale microstructure via laser additive manufacturing Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-27 Yang Qi, Hu Zhang, Xu Yang, Yilong Wang, Changjun Han, Wei Fan, Jiawei Liang, Haihong Zhu
Traditional aluminum alloys are unsuitable for structural use above 200 ℃ due to precipitate coarsening or dissolution. Laser powder bed fusion (LPBF) additive manufacturing technique enables fabri...This study elucidates superior high-temperature mechanical properties and nano-scale microstructural stability of LPBF-fabricated Al-Cu-Li-Sc-Zr alloy, offering valuable insights into grain boundar...
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Effect of matrix dislocation strengthening on deformation-induced martensitic transformation behavior of metastable high-entropy alloys Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-20 Kenta Yamanaka, Manami Mori, Daishin Yokosuka, Kazuo Yoshida, Yusuke Onuki, Shigeo Sato, Akihiko Chiba
In this study, we investigate the influence of dislocation strengthening in the metastable parent phase on the deformation-induced martensitic transformation behavior of a face-centered cubic (fcc)...This paper firstly uncovers the role and significance of matrix dislocation strengthening on the mechanical behavior of metastable high-entropy alloys via in-situ neutron diffraction experiments.
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Thermal conductivity enhancement of aluminum scandium nitride grown by molecular beam epitaxy Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-14 Gustavo A. Alvarez, Joseph Casamento, Len van Deurzen, Md Irfan Khan, Kamruzzaman Khan, Eugene Jeong, Elaheh Ahmadi, Huili Grace Xing, Debdeep Jena, Zhiting Tian
Aluminum scandium nitride (AlScN) has been receiving increasing interest for radio frequency microelectromechanical systems because of their higher achievable bandwidths owing to the larger piezoel...AlScN grown on AlN-Al2O3 and GaN-Al2O3 substrates achieve a better lattice match and a comparable thermal conductivity to AlScN grown on Si substrates, but with significantly thinner films.
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In-situ atomic-scale observation of dislocation and deformation twin interaction in FeMnCoCr high-entropy alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-09 Yan Ma, Keliang Qiu, Ning Xu, Chengpeng Yang, Jiabao Zhang, Zihao Zhang, Qingsong Deng, Yonghai Yue, Lihua Wang, Xiaodong Han
The deformation of a single-crystal Fe48Mn32Co10Cr10 alloy is captured in situ at the atomic scale. The results show that full and partial dislocations, along with deformation twins, are involved i...
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Synergistic improvement of strength and plasticity of Mg-6Li-3Al-1Sn alloy by microstructure regulation via rotary swaging Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-08 Gang Zhou, Yan Yang, Yangyang Luo, Qian Li, Qun Luo, Yu Zhang, Bin Jiang, Xiaodong Peng, Fusheng Pan
A Mg-6Li-3Al-1Sn (LAT631) alloy with a bimodal-grained structure was prepared via hot extrusion, followed by room temperature rotary swaging (RTRS). The as-extruded LAT631 alloy undergoes dynamical...This paper proposes a potential solution of Al segregation combined with precipitates for optimizing mechanical properties in ultra-light bulk Mg-Li alloys.
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In situ TEM studies of relaxation dynamics and crystal nucleation in thin film nanoglasses Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-05 Hendrik Voigt, Aaron Rigoni, Evgeniy Boltynjuk, Harald Rösner, Horst Hahn, Gerhard Wilde
Crystallization processes of glass-glass interfaces in sputtered CuZr thin film nanoglasses were directly studied using in situ heating experiments in a transmission electron microscope (TEM). By c...In-situ TEM reveals that glass-glass interfaces in CuZr nanoglasses exhibit increased excess volume promoting accelerated crystal nucleation, as shown by motif analysis extracted from nanobeam diff...
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Tunning the tensile deformation behavior and mechanism of nickel-based superalloy CM247LC by adjusting ageing treatment Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-03 Zhenhuan Gao, Peng Zhang, Jiao Li, Xiufang Gong, Yong Yuan, Xiaolong Song
We investigate the tensile deformation behavior and mechanism of nickel-based superalloy CM247LC, which has been subjected to various ageing treatment schemes, but possesses almost the same γ′ part...The work provides new insights into understanding the influence of ageing heat treatment or microstructural features on the mechanical properties and corresponding deformation and fracture mechanis...
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Progress in additive manufacturing, additive repair and fatigue evaluation of aviation titanium alloy blades Mater. Res. Lett. (IF 8.3) Pub Date : 2023-11-02 Lingfeng Wang, Yinghong Li, Liucheng Zhou, Yanshan Lou, Shijie Liu, Dayong Zheng, Min Yi
The aviation industry is a key market that promote additive manufacturing (AM) technology since there are huge demands for precision manufacture of high-value complex structural parts and repair of...
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The nucleation of δ phases triggered by the stacking faults in a single crystal superalloy Mater. Res. Lett. (IF 8.3) Pub Date : 2023-10-27 Yuan Cheng, Xinbao Zhao, Quanzhao Yue, Wanshun Xia, Qinghai Pan, Yu Zhou, Yuefeng Gu, Ze Zhang
Here we investigated the nucleation of the Re, Ru-rich δ phase affected by stacking faults in the γ phase in a 4th generation Ni-based single crystal superalloy during the service at 800°C. The sta...
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Dual crack inhibition mechanism of nano-TiC in steel–copper heterostructures formed by laser powder bed fusion Mater. Res. Lett. (IF 8.3) Pub Date : 2023-10-17 Xiaoqiang Wang, Yan Zhou, Shifeng Wen, Yusheng Shi
The formation of microcracks at the interface of steel–copper heterostructures is prone to premature failure, which severely limits the application of heterostructure components. Herein, a new appr...By doping nano-TiC particles into the steel–copper bimetallic interface, Hot crack nucleation and solid-state crack propagation were inhibited, and the crack-free steel–copper heterostructures were...
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3D mapping of residual stresses in growing grains of partially recrystallized Gum Metal Mater. Res. Lett. (IF 8.3) Pub Date : 2023-10-12 Adam Lindkvist, Wenjun Liu, Dorte Juul Jensen, Yubin Zhang
The crystallographic orientations and residual stresses within recrystallizing grains in partially recrystallized β titanium—Gum Metal—were examined non-destructively in 3D using synchrotron Differ...
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Twinning-mediated plasticity by a novel multistage twinning mode in an Mg-Al-Gd alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2023-10-06 Lei Zhao, Min Zha, Yipeng Gao, Kai Guan, Peng Chen, Meng-Na Zhang, Zhen-Ming Hua, Hai-Long Jia, Hui-Yuan Wang
Twinning-mediated plasticity has great potential for enhancing the strength and plasticity of Mg alloys, which is limited due to the lack of twin types. Here, we report a novel multistage twinning ...Introducing novel multistage twinning mode to accommodate strains appreciably along c-axes, combined with the interactions of high-density dislocations and dense twin boundaries, guarantees the hig...
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Strain glass-induced switch from transformation plasticity to reversible superelasticity in Ti-Zr-Ni-Cu alloys Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-21 Chao Song, Shuai Ren, Shaohui Li, Shengwei Li, Guijun Liu, Zhihua Nie, Yandong Wang, Daoyong Cong
Reversibility of phase transformation, a basic requirement for functional properties of shape memory alloys, such as superelasticity, is severely affected by plastic deformation. Here, strain glass...Conversion from transformation plasticity to reversible superelasticity is realized by employing the strain glass concept.
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Hierarchically heterogeneous microstructure and mechanical behavior of the multi-materials prepared by powder severe plastic deformation Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-19 Sujung Son, Jungwan Lee, Peyman Asghari-Rad, Rae Eon Kim, Hyojin Park, Jae-il Jang, Wen Chen, Yoon-Uk Heo, Hyoung Seop Kim
A heterostructuring strategy is an effective approach for abiding problems referred to as the strength-ductility trade-off. However, tailoring the heterostructure is an arduous problem. This work s...A hierarchically heterogeneous microstructure comprised of the eutectic high-entropy alloy and medium-entropy alloy was synthesized by the P-SPD procedures and achieved supreme mechanical propertie...
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Revealing the mechanical behavior of homogeneous dislocation cell units in high-entropy alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-19 Liangxue Zhang, Qingsong Pan, Lei Lu
Gradient dislocation cell structured Al0.1CoCrFeNi high-entropy alloys exhibited exceptional strength and uniform ductility. HEA containing homogeneous dislocation cells, with the average size vary...
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In situ TEM study of the thermal stability of nanotwinned Ni-Mo-W alloys Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-11 Mo-Rigen He, Ruopeng Zhang, Rohan Dhall, Andrew M. Minor, Kevin J. Hemker
Microstructural evolution in nanotwinned Ni-Mo-W alloys under in situ heating experiments is investigated in a transmission electron microscope. Migration of twin boundaries and grain boundaries as well as formation of carbide precipitates are observed at various temperatures and characterized at atomic resolution. These transformations are found to occur at temperatures that are ∼200°C lower in Mo-rich
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High-temperature creep-induced site occupation evolution in the γ′ lattice in a Ru-bearing Ni-based superalloy Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-13 Yunsong Zhao, Na Li, Li Wang, Junyang He, Weihong Liu, Min Song
By using state-of-the-art characterisation techniques including atom probe tomography and atomic resolved elemental mapping, we successfully probed the site occupation evolution associated with composition change in γ′, during 1100°C creep of a fourth generation Ru-bearing Ni-based superalloy. It is quantified that, W and Ru maintain unchanged site preference after creep rupture, while interestingly
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In-situ EBSD investigation of orientation induced mechanical anisotropy in selective laser melted Al-Mn-Sc alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-13 Wei Jiang, Yunlai Deng, Qingsong Dai, Xiaobin Guo
The mechanical anisotropy of selective laser melted (SLM) aluminum alloys resulting from heterogeneous grain structures is still not fully understood due to lacking study of grain orientation related mechanical response. Here, by introducing in-situ EBSD tensile method, the orientation induced anisotropy coefficient Ka related to the deformation-induced grain rotation was revealed by excluding effects
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Heterostructured titanium composites with superior strength-ductility synergy via controllable bimodal grains and dislocation activity Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-05 Jiajing Chen, Yuanfei Han, Zichao Wei, Shaopeng Li, Zhonggang Sun, Liang Zhang, Guangfa Huang, Jianwen Le, Di Zhang, Weijie Lu
Constructing heterostructures in particulate reinforced titanium matrix composites (PRTMCs) to evade the strength-ductility trade-off dilemma is much more difficult than in metals. Here, we proposed a novel and controllable strategy of simple powder assembly to fabricate bimodal-grained PRTMCs, this customized strategy makes coarse grains (CGs) surrounded by ultrafine-grained (UFG) matrices, conferring
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Role of microscopic degrees of freedom in mechanical response of bicrystal nanopillars Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-06 Avanish Mishra, Khanh Dang, Edward M. Kober, Saryu J. Fensin, Nithin Mathew
This study investigated the high-strain rate deformation of bicrystal Cu nanopillars, using atomistic simulations. Nanopillars with minimum grain boundary energy were deformed to investigate the role of macroscopic degrees of freedom, finding that geometric parameters (Schmid factor) influence the stress–strain response. The deformation of metastable grain boundaries (GBs) revealed that in addition
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A comprehensive review of fabrication techniques and their impact on mechanical behaviour and osteoregenerative applications of bioactive inorganic substituents Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-01 K. K. Anavadya, Uthirapathy Vijayalakshmi
Multifarious materials are used in the biomedical domain to relieve the distress of patients due to underlying diseases or injuries by replacing or augmenting any tissues or organs. Specific metallic substrates used as implants have the probability of failure due to corrosion resulting from direct contact with body fluid. Therefore, we aim to conduct a thorough review of numerous coatings currently
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A method for increasing the supersolvus critical strain for recrystallization in single-crystal superalloys Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-04 Sicong Lin, Kai Chen, Qiang Zeng, Upadrasta Ramamurty
Recrystallization, possibly triggered during heat treatments by plastic strains of only 1–2%, is highly deleterious to Ni-based single-crystal superalloys. Herein, we successfully recover plastic deformation and enhance the supersolvus critical strain for recrystallization by ramping the annealing temperature slowly from 1100 °C to γ′-solvus point. This preempts recrystallization during the subsequent
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Understanding creep behaviors of additively manufactured 316L stainless steel via void characterization Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-01 Xuan Zhang, Christopher P. Carter, Yashas Satapathy, Aniket Tekawade, Jun-Sang Park, Peter Kenesei, Meimei Li
Additively manufactured (AM) 316L stainless steel (SS) has been reported to have low creep resistance compared to its conventionally made counterparts. Herein, we quantitatively characterized the voids in a creep-ruptured AM 316L SS specimen and those in a conventional specimen ruptured under the same testing condition. The AM 316L SS contained more small creep voids and fewer large ones. 3D reconstructions
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Mechanism analysis of grain growth dominated by alloy composition gradients during powder bed fusion Mater. Res. Lett. (IF 8.3) Pub Date : 2023-09-01 Liming Yao, Zhongmin Xiao, Zhiongsheng Hoo, Chao Tang, Jing Qiao, Yanmei Zhang
A multi-physics simulation model has been established to investigate the influence of Laser powder bed fusion parameters on the spatial composition distribution and grain growth mechanism of the single-track printed dissimilar alloys. Our study shows that alloy composition gradient isosurfaces can be used to visualize the spatial distribution of alloy composition for miscible dissimilar alloys. When
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The potential benefit of pseudo high thermal conductivity for laser powder bed fusion additive manufacturing Mater. Res. Lett. (IF 8.3) Pub Date : 2023-08-07 Huan Ding, Selami Emanet, Yehong Chen, Shengmin Guo
This study examined the impact of transient pseudo high thermal conductivity to the fabrication of crack-free parts with Laser Powder-Bed-Fusion (L-PBF) based additive manufacturing (AM) method. Thermal diffusivity and thermal conductivity of L-PBF samples made by mixtures of IN939 alloy and Si powders were investigated. At temperatures above 800°C, the as-fabricated Si-doped IN939 was observed to
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Oscillatory buckling reversal of a weak stripe magnetic texture Mater. Res. Lett. (IF 8.3) Pub Date : 2023-07-24 K. Ait Oukaci, D. Stoeffler, M. Hehn, M. Grassi, B. Sarpi, M. Bailleul, Y. Henry, S. Petit, F. Montaigne, R. Belkhou, D. Lacour
By combining volume sensitive high resolution Magnetic Force Microscopy with surface sensitive X-ray Photoemission Electron Microscopy, we resolved the depth profile of a weak stripe magnetic texture and its evolution upon in-plane magnetization reversal. In contrast to previous reports, we show that the conventional weak stripe texture undergoes a well-defined undulation while the magnetic field is
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Anisotropic segregation-driven texture weakening in a dilute Mg-Al-Ca alloy during isothermal annealing Mater. Res. Lett. (IF 8.3) Pub Date : 2023-07-21 Meng-Na Zhang, Hai-Long Jia, Min Zha, Lei Zhao, Zhen-Ming Hua, Cheng Wang, Yi-Peng Gao, Hui-Yuan Wang
Tailoring recrystallization via particle-stimulated nucleation (PSN) and pinning effects from secondary phase particles effectively weakens textures, which is still challenging for low-alloyed rare earth-free Mg alloys. Herein, the texture of a dilute cold-rolled Mg-2.2Al-0.33Ca (wt.%) alloy is found to reduce with the appearance of transverse direction (TD) texture components during static recrystallization
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In-situ study of rules of nanostructure evolution, severe plastic deformations, and friction under high pressure Mater. Res. Lett. (IF 8.3) Pub Date : 2023-07-12 Feng Lin, Valery I. Levitas, Krishan K. Pandey, Sorb Yesudhas, Changyong Park
Severe plastic deformations under high pressure are used to produce nanostructured materials but were studied ex-situ. Rough diamond anvils are introduced to reach maximum friction equal to yield strength in shear and the first in-situ study of the evolution of the pressure-dependent yield strength and radial distribution of nanostructural parameters are performed for severely pre-deformed Zr. ω-Zr
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Giant hardening and formation of nanograined supersaturated solid solution in Al–Zn system Mater. Res. Lett. (IF 8.3) Pub Date : 2023-07-12 Yiming Zhong, Bo Zhang, Ling Fang, Junjie Chen, Wei Xu, Xiuyan Li
Grain refinement via severe plastic deformation (SPD) can induce the decomposition of Al–Zn supersaturated solid solution, resulting in strain softening rather than hardening. So far, it is very challenging to improve the strength of binary Al–Zn alloy by refining grains through SPD. Herein, a single-phase supersaturated solid solution nanostructure with relaxed grain boundaries has been successfully
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Simultaneously improving mechanical and magnetic properties through heterogeneous lamella structures in a superalloy-like, soft magnetic complex concentrated alloy Mater. Res. Lett. (IF 8.3) Pub Date : 2023-07-11 Xiao Liu, Kenneth Vecchio
ABSTRACT Heterogeneous lamella (HL) structures were produced via simple processing steps in a FeCoNi-based complex concentrated alloy (CCA) with superalloy-like FCC/L12 microstructure. Compared to the homogeneous-structured control specimens, the HL-structured specimens exhibited synergic enhancements in strengths and ductility (with σy up to 1 GPa, σu up to 1.4 GPa, and ϵt up to 16.5%), and at the
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Single-atomic site catalysts for electrochemical nitrogen fixation Mater. Res. Lett. (IF 8.3) Pub Date : 2023-06-26 Mingwei Chang, Jing Wu, Li Xu, Liming Zhang
Renewable-energy-derived electrochemical nitrogen fixation represents a sustainable way to produce green ammonia (NH3), but the energy efficiency is limited by its sluggish kinetics and complex reaction pathways. Highly active, selective and robust electrocatalysts are strongly needed to promote the efficiency of nitrogen conversion. Here, we provide an overview of the recent progress in understanding