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Shuffling pathway of anti-twinning in body-centered-cubic metals Scr. Mater. (IF 6.0) Pub Date : 2024-03-14 Hongxian Xie, Gaobing Wei, Jun-Ping Du, Akio Ishii, Guanghong Lu, Peijun Yu, Shigenobu Ogata
In this study, anti-twinning and deformation twinning of body-centered-cubic (BCC) metals under nanoindentation were examined. Molecular dynamics (MD) simulations of BCC tantalum (Ta) showed both the existence of anti-twinning and a novel two-layer-by-two-layer anti-twinning pathway consisting of a staggered shuffle sliding of atomic planes in the and directions, generating finite shear displacement
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Reversible charge injection in artificially created charged domain wall region Scr. Mater. (IF 6.0) Pub Date : 2024-03-14 Dongfang Chen, Xiaojun Tan, Xu Jiang, Jun Jiang
The impact of electric field application in the charged domain wall (DW) region on the performance of DW devices remains elusive. Here, we present our observations of substantial charge injection occurring in an artificially created charged DW region. Rapid charge injection coincides with polarization switching, contributing to the transient current collected for the integration of polarization-voltage
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How UV irradiation enhances electrical conductance at a grain boundary in SrTiO3 Scr. Mater. (IF 6.0) Pub Date : 2024-03-14 Manlika Sriondee, Nant Nammahachak, Tanachat Eknapakul, Arunothai Rattanachata, Chanan Euaruksakul, Hideki Nakajima, Narit Triamnak, Kitiphat Sinthiptharakoon, Worawat Meevasana, Sutatch Ratanaphan
Electrical conductance measured from across or parallel to a {110} symmetrical grain boundary in SrTiO is considerably lower than the ones of the adjoined (100) grains and a SrTiO (100) single crystal, but these differences are decreased significantly upon UV irradiation. Based on ultraviolet photoelectron spectroscopy and complementary conductive atomic force microscopy, we demonstrate that the hundredfold
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Mapping formation mechanisms and transformation regimes of multiple Fe precipitates in Cu-Fe-Co alloy during casting process Scr. Mater. (IF 6.0) Pub Date : 2024-03-12 Kaixuan Chen, Yumeng Chen, Chenyu Zhao, Fanyun Zhang, Xiangkai Chen, Kaisheng Ming, Helena Zapolsky, Yuzhi Zhu, Xiaohua Chen, Huahai Mao, Zidong Wang
Precipitate features including size, morphology, crystal structure, etc., are important parameters determining the performance of precipitate-strengthened alloys. Multiple Fe precipitates were identified in as-cast Cu alloys exhibiting the distinct features, which dramatically influence mechanical properties. However, a complete understanding of precipitation behaviors of Fe particles during casting
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Solute segregation at the stacking faults in the γ phase of Ni-based single crystal superalloys Scr. Mater. (IF 6.0) Pub Date : 2024-03-09 Kai Wu, Wenqi Guo, Surendra Kumar Makineni, Xiaoxiang Wu
Creep deformation at intermediate temperatures and high-stress conditions in a second-generation Ni-based superalloys occurs by continuous shearing of γ and γ' phases that lead to the formation of a high number density of stacking faults (SFs). Solute segregations to these faults highlight that their diffusivities play a critical role as creep rate limiting solutes. Although most of the earlier works
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Revealing the roles of martensitic transformation in affecting the fatigue resistance of austenitic stainless steel with heterogeneous grain size distribution Scr. Mater. (IF 6.0) Pub Date : 2024-03-08 W.P. Li, B.B. He, Y.H. Sun, H.W. Yen, M.X. Huang, C. Jiang
The present work investigates the roles of martensitic transformation on the small fatigue crack growth behavior and fatigue resistance of a 316 L austenitic stainless steel. Martensitic transformation with varied block size takes place along crack path and at the crack tip. The large martensite blocks are vulnerable to crack propagation as the cracks can easily penetrate the block interior, leaving
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Formation mechanism of ultrafine α+β structure in Ti-6Al-4V alloy during β→αm→α+β continuous phase transformation Scr. Mater. (IF 6.0) Pub Date : 2024-03-07 Jianan Hu, Yuan Jiang, Yi Yang, Hui Xing, Fuzhou Han, Gang Zhou, Kai Zhang, Shewei Xin, Siyuan Zhang, Jian Huang, Hao Wang, Geping Li, Lai-Chang Zhang, Aijun Huang
Although massive transformation has been increasingly observed in titanium alloys, the decomposition mechanism of the massive transformation product (α) is still unclear. Here, the β→α→α+β continuous phase transformation in Ti-6Al-4V alloy during cooling was studied. We found that massive transformation occurs at a moderate cooling rate below 291.5 °C/s, forming irregular featureless α. The thermodynamically
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Temperature dependence of elastocaloric effect in a microstructurally graded NiTi alloy Scr. Mater. (IF 6.0) Pub Date : 2024-03-07 Junyu Chen, Wenqiang Wang, Qi Zhang, Liping Lei, Upadrasta Ramamurty, Gang Fang
The temperature dependence of elastocaloric cooling properties of a NiTi alloy with a grain size gradient, which was obtained by cold rolling and subsequent laser surface annealing, was evaluated and compared with those of coarse-grained and as-rolled NiTi. Results show that the adiabatic temperature change () and cooling efficiency of the gradient-structured NiTi are significantly enhanced over a
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An ultra-high strength bainitic aging steel Scr. Mater. (IF 6.0) Pub Date : 2024-03-06 Xinlei Zhou, Tianyi Zeng, Xianbo Shi, Mingchun Zhao, Wei Wang, Yanfen Li, Wei Yan
Bainite has been recognized to have both high strength and good toughness. Therefore, the isothermal quenching treatment at 220 ºC was applied to conventional maraging steel with ultra-low carbon content. It was found that the bainitic microstructure was successfully achieved by isothermal quenching treatment for this maraging steel. After aging at 500 ºC for 3 h, the tensile strength of such bainitic
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An ab initio guided study on the shear-induced fcc-hcp transition: A case study of (Ti,Al)N/ZrN multilayers Scr. Mater. (IF 6.0) Pub Date : 2024-03-05 Jie Zhang, Chun Hu, Li Chen, Yi Kong, Paul H. Mayrhofer
The cubic-wurtzite phase transition of (Ti,Al)N-based thin films at high temperatures is the chief determing factor for their thermal stability. Nevertheless, its mechanism of atomic shear is not yet well explored theoretically. Here, we correlate the coherent interfaces with wurtzite formation within (Ti,Al)N/ZrN multilayers by a combined and experimental study. Compared to (Ti,Al)N, the multilayer
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An ultrahigh energy storage density in lead-free Na0.5Bi0.5TiO3-NaNbO3 based ceramics via multiple optimization strategies Scr. Mater. (IF 6.0) Pub Date : 2024-03-05 Wenhan Zeng, Xiang Niu, Yuleng Jiang, Huanwei Liu, Zihao Xu, Xubing Lu, Mingtao Xu, Hongbin Lin, Houzhu He, Xiaobo Zhao, Yingbang Yao, Tao Tao, Bo Liang, Sheng-Guo Lu
Currently, dielectric capacitors with superior charge-discharge performance, long lifetime, and high power density are drawing increasing attention, especially for lead-free ferroelectrics due to their environmental friendliness, multi-functional applications and excellent energy storage properties. In this work, lead-free relaxor ferroelectric Sr(MgTa)O (SMT)-modified NaBiTiONaNbO (NBT-NN) bulk and
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Quantification of melt pool dynamics and microstructure during simulated additive manufacturing Scr. Mater. (IF 6.0) Pub Date : 2024-03-05 James Lamb, Ruben Ochoa, Adriana Eres-Castellanos, Jonah Klemm-Toole, McLean P. Echlin, Tao Sun, Kamel Fezzaa, Amy Clarke, Tresa M. Pollock
The dynamics of laser spot melting and metallic alloy solidification are investigated through synchrotron x-ray radiography, 3D electron backscatter diffraction data, and computational fluid dynamics (CFD) simulations on a model NiMoAl alloy. Solidification velocities are measured from images to validate a CFD model of the spot melt. TriBeam tomography is used to reconstruct the melt pool in 3D, characterize
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Insights into a novel refractory multi principal element alloy (Mo98W2)85Nb10(TiHf)5 and advancements in oxidation resistance upto 1300 °C through silicide coatings Scr. Mater. (IF 6.0) Pub Date : 2024-03-04 Arijit Das, Sanjib Majumdar
In the present work, a novel refractory multi-principal element alloy (MoW)Nb(TiHf) was developed through comprehensive material testing, including high-temperature exposure and oxidation resistance assessments. It was found that after pack siliconizing, the samples could withstand high temperatures up to 1300 °C with a marginal weight change of 0.255 mg/cm during four hours holding time. The overall
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Thermal explosive synthesis of MoAlB Scr. Mater. (IF 6.0) Pub Date : 2024-03-04 Mariia Teslia, Serhii Teslia, Ievgen Solodkyi
The thermal explosion method was used to synthesize pure MoAlB. First of all, thermodynamic evaluation of the synthesis based on the Gibbs potentials was performed. The thermal explosion was initiated by synthesis in hydrogen atmosphere at 500–900 °C. The analysis of the synthesized materials was carried out by X-ray diffraction and electron microscopy along with local chemical analysis. As a result
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The spin glass and zero-field cooling exchange bias effect observed above the curie temperature in Ni2MnSb polycrystalline Heusler alloy Scr. Mater. (IF 6.0) Pub Date : 2024-03-04 Fanghua Tian, Qizhong Zhao, Jiale Guo, Yin Zhang, Tieyan Chang, Rui Zhang, Murtaza Adil, Chao Zhou, Kaiyan Cao, Sen Yang
The exchange bias after zero-field cooling based on the spin glass state has the potential for widespread technical practicality. However, it is limited by the lower frozen temperature (< 150 K) of traditional spin glass, which hinders its practical application. In this work, the nano-ferromagnetic characteristic was observed above the curie temperature in the NiMnSb polycrystalline alloy, induced
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Grain boundary and twin boundary solute segregations in nanocrystalline Al-Mg alloy Scr. Mater. (IF 6.0) Pub Date : 2024-03-04 X.Y. Sheng, Z. Shang, A.Y. Shang, H. Wang, X. Zhang
Chemical segregations at grain boundaries (GBs) have been broadly investigated in Al alloys. However, there are limited experimental evidence demonstrating the dependence of solute segregation on GB characteristics. Here, we quantified solute segregation at GBs in nanocrystalline Al-1Mg (at.%) alloy by combining energy-dispersive X-ray spectroscopy, high-resolution scanning transmission electron microscopy
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Large pores promote abnormal grain growth behavior in calcia doped alumina Scr. Mater. (IF 6.0) Pub Date : 2024-03-02 Daniel P. DeLellis, Amanda R. Krause
This work demonstrates that large pores promote abnormal grain growth, a commonly observed but poorly understood behavior. To investigate this phenomenon, calcia doped aluminum oxide is used as a model ceramic because of its known propensity for abnormal grain growth. Controlled porous microstructures are fabricated using polymer microspheres with nominal diameters approximately an order of magnitude
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Restrained diffusional transformation in high entropy (TiZrVNbTa)2AlC ceramic under He ions irradiation Scr. Mater. (IF 6.0) Pub Date : 2024-02-29 Xiao-Jie Guo, Weichao Bao, Xin-Gang Wang, Ying Lu, Chenxi Zhu, Xiao-Ting Xin, Fangfang Xu, Guo-Jun Zhang
The high-entropy (HE) effect has been reported to be able to improve the structural stability of materials under irradiation. However, whether the HE strategy is also effective for MAX phases having specific metal-carbide intercalating structures and suffering from serious diffusional transformation under irradiation remains unknown. In this study, NbAlC and high-entropy (TiZrVNbTa)AlC were prepared
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Deformation induced self-accommodation morphology transition from triangular to nano-twinned martensite in Ti-Nb-Zr shape memory alloys Scr. Mater. (IF 6.0) Pub Date : 2024-02-28 Bin Wang, Yulin Chen, Zhiyuan Xu, Chen Chen, Jian Zhang
Ti-Nb ( < 24) shape memory alloys (SMAs) typically exhibit triangular self-accommodation morphology of α” martensite after thermal β→α” transformation, whereas α” variants contain no internal twins. In present work, we found an interesting transition from the self-accommodated triangular into nano-twinned martensite morphology during tensile deformation in solution treated Ti-20Nb-(3, 6)Zr SMAs. Such
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Amorphization of nano-Mg layers in LPSO-containing magnesium alloy during cyclic deformation Scr. Mater. (IF 6.0) Pub Date : 2024-02-28 X.H. Shao, C. He, H.Q. Liu, N. Su, Y.J. Wu, Q. Chen, X.L. Ma
Microstructural evolution during fatigue is of significance for understanding the fatigue cracking of metallic alloys. Here, we visualized amorphization near the fatigue facets for an Mg-Gd-Y-Zn-Zr alloy with long-period stacking ordered (LPSO) phase upon very high cycle fatigue (VHCF). The small amorphous patches occurred in the relatively soft nano-Mg layers, compared to the hard LPSO phase, and
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In-situ observation of magnetic domain reversal during magnetic viscosity of permanent magnets Scr. Mater. (IF 6.0) Pub Date : 2024-02-26 Zhihe Zhao, Jiangtao Zhao, Jiazhuan Qin, Yingli Sun, Weixing Xia, Zhenlong Chao, Renjie Chen, Aru Yan, Longtao Jiang
Magnetic viscosity analysis is a widely studied topic in understanding the stability and magnetization mechanisms of magnets. However, observing the minute changes in magnetic domains during the magnetic viscosity process poses a challenge in research. To address this issue, a self-made in-situ magnetized sample holder was used in this study to observe the dynamic evolution of domain structures in
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A highly sensitive MoS2/MoTe2 heterostructure enhanced by localized surface plasmon effect for broad-spectrum photodetection Scr. Mater. (IF 6.0) Pub Date : 2024-02-24 Mengya Yu, Cuicui Jiang, Boyuan Yan, Lin Lin, Shicai Wang, Tianxun Gong, Junxiong Guo, Wen Huang, Xiaosheng Zhang
We reported a MoS/MoTe heterostructure with Au nanoparticles (Au NPs) using mechanical exfoliation and capillary-assisted particle assembly method. The photodetection properties of the heterostructure were significantly enhanced by the localized surface plasmon polaritons effect induced by the Au NPs. The results reveals that the maximum responsivity of the MoS/MoTe heterostructure with Au NPs is 2771
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Simultaneously significant transparency enhancement and efficient temperature feedback achieved in AlON ceramic through luminescent rare earth doping Scr. Mater. (IF 6.0) Pub Date : 2024-02-22 Kailei Lu, Xiaolan Zhou, Shengyuan Chen, Xu Huang, Guixin Wang, Jianqi Qi, Tiecheng Lu
Activator-doped aluminum oxynitride (γ-AlON) could provide an extremely versatile transparent ceramic with photothermal feedback, opening the door to many new applications and devices for use in extreme conditions. However, existing AlON transparent ceramics have failed to achieve temperature-responsive luminescence. To address this, a simple-to-implement luminescent rare-earth doping strategy for
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Improved superelastic stability by nanosegregation via low-temperature aging in Ti-50.9 at.% Ni shape memory alloy Scr. Mater. (IF 6.0) Pub Date : 2024-02-22 Zhihao Zhao, Jianping Lin, Yao Xiao, Junying Min
The effects of nanosegregation arising from low-temperature aging (LTA) on cyclic response of Ti-50.9 at.% Ni are investigated. Hybrid Monte Carlo/Molecular Dynamics (MC/MD) simulation indicates that the most pronounced nanosegregation is achieved by LTA at 523 K. MD simulation shows Ni cluster can impede the advancement of {011}<100> dislocations, which prevail the slipping activity of NiTi, during
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Combining muon spin relaxation and DFT simulations of hydrogen trapping in Al6Mn Scr. Mater. (IF 6.0) Pub Date : 2024-02-21 Kazuyuki Shimizu, Katsuhiko Nishimura, Kenji Matsuda, Satoshi Akamaru, Norio Nunomura, Takahiro Namiki, Taiki Tsuchiya, Seungwon Lee, Wataru Higemoto, Tomohito Tsuru, Hiroyuki Toda
Hydrogen at the mass ppm level causes hydrogen embrittlement in metallic materials, but experimentally elucidating the hydrogen trapping sites is extremely difficult. We exploit the fact that positive muons can act as light isotopes of hydrogen to study the trapping state of hydrogen in matter. Zero-field muon spin relaxation experiments and density functional theory (DFT) calculations of the hydrogen
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Unraveling potential phase transition mechanism of NBT-based systems: From an interesting view to survey ferroelectric loops Scr. Mater. (IF 6.0) Pub Date : 2024-02-20 Xiaojun Wu, Chao Wu, Lanji Wen, Jie Yin, Jiagang Wu
As for assessing strain performances of NaBiTiO-based systems, the driving field level is a critical parameter. Currently, both current density and strain rate evaluation methods have been utilized to characterize the driving field. However, we find that some discrepancies indeed exist between these two evaluation methods, especially for the highly ergodic condition. By means of the typical ferroelectric
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New insights into the character of austenite-ferrite boundaries in an additively manufactured duplex stainless steel Scr. Mater. (IF 6.0) Pub Date : 2024-02-20 N. Haghdadi, A.J. Breen, H. Chen, F. Theska, W.J. Davids, X.Z. Liao, G.S. Rohrer, S.P. Ringer, S. Primig
The crystallography and chemistry of interfaces between austenite and ferrite in duplex steels control many important materials properties but remain poorly understood. In this study, we experimentally show that in an additively manufactured and heat treated duplex stainless steel, the majority of austenite-ferrite interfaces terminate on {111}/{110} planes, and this behaviour is more pronounced for
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Connecting processing conditions to microstructure evolution in laser powder bed fusion via defect modeling Scr. Mater. (IF 6.0) Pub Date : 2024-02-20 Markus Sudmanns, Jaafar A. El-Awady
The highly localized multiphysics nature of laser powder bed fusion (PBF-LB) induces complex transient temperature and strain profiles that challenge predictive modeling of microstructure evolution and resulting mechanical properties. Discrete dislocation dynamics (DDD) simulations were conducted to model the evolution of dislocation structures during rapid cooldown after laser powder bed fusion (PBF-LB)
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Optimizing precipitation hardening in a L12-strengthened medium-entropy alloy via tuning the anti-phase boundary energy Scr. Mater. (IF 6.0) Pub Date : 2024-02-19 Wenjie Lu, Junjie Gong, Bin Huang, Yafeng Wang, Xu-Sheng Yang, Xian Luo, Rui Hu, Yanqing Yang
In present work, we investigate the elemental partition behaviors in L1 ordered intermetallics and its influence on mechanical properties in a Ni-Co-Cr-Al-Ta medium-entropy alloy (MEA) system through a combination of density functional theory (DFT) calculations and experimental investigation. Our finding reveal that Ta has a strong tendency to occupy Al sublattice, while Co prefers Ni sublattice, Cr
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A breakthrough in creep lifetime prediction: Leveraging machine learning and service data Scr. Mater. (IF 6.0) Pub Date : 2024-02-17 Arsalan Zare, Reza Khadem Hosseini
Improvement of data-driven techniques, specifically machine learning (ML), in material science turned it into a powerful tool for predicting materials behavior. Accordingly, this study provides a ML prediction of empirical creep lifetimes of 9Cr-1Mo ex-service heater tubes that have been used in industry for up to 47 years. Data from over 90,000 h of stress rupture tests shows that the service parameters
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Microstructure and structural modulation of lutetium dihydride LuH2 as seen via transmission electron microscopy Scr. Mater. (IF 6.0) Pub Date : 2024-02-16 Xiao-Ping Ma, Ning-Ning Wang, Wen-Tao Wang, Jing-Zhe Nie, Wen-Li Gao, Shuai-Shuai Sun, Jun Li, Huan-Fang Tian, Tian-Long Xia, Jin-Guang Cheng, Jian-Qi Li, Huai-Xin Yang
Structural investigations conducted using transmission electron microscopy (TEM) on LuH synthesized under atmospheric pressure (AP-LuH) and nitrogen-doped LuH synthesized under high pressure (HP-LuH) have revealed numerous microstructural phenomena. Both materials show a clear superstructure modulation with wave vector, , and this modulation can be interpreted by the displacements of Lu atoms. Further
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Versatility of dislocation motions in polycrystalline UO2 deformed at 1550 °C investigated by TEM Scr. Mater. (IF 6.0) Pub Date : 2024-02-14 C. Onofri, J.P. Monchoux, J. Amodeo, R. Madec, C. Sabathier, H. Palancher, J. Fouet, D. Drouan, M. Legros
The present study explores the behavior of dislocations in uranium dioxide (UO) under mechanical loading at high-temperature. Transmission electron microscopy characterization was carried out on polycrystalline UO pellets after uniaxial compression tests performed at constant strain rate and 1550 °C. The detailed characterization of dislocation motion provides insights on the deformation processes
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Rapid portabilization of elasto-chemical evolution data for dental Ti-Cr alloy microstructure through sparsification and tensor computation Scr. Mater. (IF 6.0) Pub Date : 2024-02-14 Upadesh Subedi, Nele Moelans, Tomasz Tański, Anil Kunwar
Tailoring the microstructural design of a metastable two-phase Ti-Cr dental implant alloy with the optimal quantity of Cr-rich LAVES structure requires an integration of computation with informatics. This research introduces a stepwise process for generating alloy microstructure data using the phase field method, followed by sparsification and tensor computation techniques to reconstruct a microstructural
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Hook's law scaled broken-bond model for surface energy: From metals to ceramics Scr. Mater. (IF 6.0) Pub Date : 2024-02-14 Ying Zhang, William Yi Wang, Peixuan Li, Ke Ren, Yixuan He, Xingyu Gao, Hongchao Kou, Jun Wang, Yiguang Wang, Haifeng Song, Xiubing Liang, Jinshan Li
Innovative surfaces via lattice engineering are crucial challenges and critical to enhance the mechanical and functional properties of advanced materials. Here, a universal linear scaling rule in terms of key property parameters (KPPs) is proposed to estimate the modifications of local lattice strain (LLS) caused by the surface, in which the bulk modulus (), the ratio, and the bond energy are utilized
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The unexpected low fracture toughness of dual-phase steels caused by ferrite/martensite interface decohesion Scr. Mater. (IF 6.0) Pub Date : 2024-02-13 Lang Liu, Liejun Li, Jiazhen He, Zhiyuan Liang, Zhengwu Peng, Jixiang Gao, Zhichao Luo, Mingxin Huang
Recently, new categories of dual-phase (DP) steels with ultimate tensile strength (UTS) up to 1400 MPa have been developed by increasing martensite fraction and refining microstructure. The present work demonstrates for the first time that the fracture toughness of DP steel can be less than half of that of the counterpart fully martensitic steel with the same chemical composition. The severe decohesion
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Interphase boundary segregation in IN738 manufactured via electron-beam powder bed fusion Scr. Mater. (IF 6.0) Pub Date : 2024-02-13 Vitor V. Rielli, Ming Luo, Ehsan Farabi, Nima Haghdadi, Sophie Primig
Electron-beam powder bed fusion (EPBF) has been demonstrated to enable crack-free additive manufacturing of the traditionally non-weldable IN738 Ni-based superalloy. This is related to grain boundary (GB) segregation and precipitation phenomena during EPBF thermal cycling. We investigate such GB microstructures around typical interphase boundaries in IN738. Cyclic reheating results in γʹ dissolution
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Uniting superior mechanical properties with oxidation resistance in a refractory high-entropy alloy via Cr and Al alloying Scr. Mater. (IF 6.0) Pub Date : 2024-02-13 Dingcong Cui, Xin Liu, Zhongsheng Yang, Bojing Guo, Zhijun Wang, Junjie Li, Jincheng Wang, Feng He
Refractory high-entropy alloys (RHEAs) have attracted considerable interest due to their elevated melting points and remarkable softening resistance. Nevertheless, the ambient-temperature brittleness and inadequate high-temperature oxidation resistance commonly limit the application of the body-centered-cubic (BCC) RHEAs. In this study, we achieved a TiVHfNbCrAl RHEA with a desirable yield strength
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Role of Na in structural and polarization characteristics of prototype lead-free K0.5Na0.5NbO3 piezoelectrics Scr. Mater. (IF 6.0) Pub Date : 2024-02-13 Na Wang, Yonghao Yao, Hui Liu, Jun Chen
The structure, polarization characteristics and underlying mechanism in KNaNbO (KNN50) are studied using first-principles calculations and neutron total scattering. We thoroughly examined the stability of rhombohedral (), orthorhombic () and tetragonal () phases with various K/Na configurations, among which phase is indeed energy favored, which could account for local monoclinic () polarization around
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Ternary phase diagram and dielectric behavior of BiFeO3-BaTiO3-SrTiO3 solid solutions Scr. Mater. (IF 6.0) Pub Date : 2024-02-12 Hanting Dong, Liang Ke, Xiangjun Hui, Jiangfeng Mao, Haiqing Du, Wenqi Yuan
Ternary phase diagrams and dielectric properties of BiFeO-BaTiO-SrTiO (BF-BT-ST) solid solutions were calculated by phenomenological theory, and crystal structures and dielectric characteristics of BF-BT-ST ceramics via solid-state reaction method were also investigated. Rhombohedral, tetragonal and cubic phase can exist at room temperature, and cubic phase region expands as the temperature rises.
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Stress-induced symmetrical tilt boundaries in layer-structured Al-Cu eutectic alloys Scr. Mater. (IF 6.0) Pub Date : 2024-02-09 Daisuke Egusa, Tsuyoshi Mayama, Koji Hagihara, Eiji Abe
We have investigated symmetrical tilt boundaries spontaneously introduced by compressing layer-structured Al-Cu eutectic alloys, based on scanning electron microscopy (SEM), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM) and crystal plasticity (CP) analysis. SEM observations show sine-wave-like bending of a layered structure consisting of soft Al and hard AlCu
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Gravity-induced structural deformation for enhanced ferroelectric performance in lead-free piezoelectric ceramics Scr. Mater. (IF 6.0) Pub Date : 2024-02-08 Sangwook Kim, Hyunwook Nam, Jamil Ur Rahman, Piyush Sapkota
The effect of gravity-driven sintering on the enhancement of ferroelectricity in lead-free piezoelectric ceramics was investigated. The (BaSr)TiO ceramics were fabricated using normal sintering and gravity-driven sintering. The ferroelectricity was investigated from polarization-electric field hysteresis loops, revealing that gravity-driven sintering led to an enhancement of ferroelectricity. Temperature-dependence
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Complex magnetism and large coercivity in a tetragonal high entropy spinel oxide Scr. Mater. (IF 6.0) Pub Date : 2024-02-06 Neha Sharma, Sushanta Mandal, Sambit Choudhury, Sanjoy Kr Mahatha, Sourav Marik
The disorder can exert a dominant impact on correlated and quantum materials, resulting in unique behaviors that lack clear analogies in pristine conditions. In high entropy materials, the presence of multiple elements introduces a high atomic level disorder and gives rise to unique properties. In this paper, we have utilized the novel high entropy route to synthesize a new tetragonal high entropy
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A quantitative relation for the ductile-brittle transition temperature in pipeline steel Scr. Mater. (IF 6.0) Pub Date : 2024-02-06 Chunlei Shang, Dexin Zhu, Hong-Hui Wu, Penghui Bai, Faguo Hou, Jiaye Li, Shuize Wang, Guilin Wu, Junheng Gao, Xiaoye Zhou, Turab Lookman, Xinping Mao
An accurate description of pipeline steel at low temperatures requires a comprehensive understanding of its ductile-brittle transition temperature (DBTT). In this work, we collect a data set of low-temperature toughness for pipeline steel and reduce the dimensionality of the data set using several feature screening approaches. Multiple machine learning models, validated via ten-fold cross-validation
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NiZnFe2O4 core-shell nanoflowers as effective EMI shielding material dedicated to the absorption of electromagnetic waves in the UHF band and wide temperature range Scr. Mater. (IF 6.0) Pub Date : 2024-02-05 Adrian Radoń, Agnieszka Ciuraszkiewicz, Łukasz Hawełek, Jerzy Kubacki, Mariola Kądziołka-Gaweł, Dariusz Łukowiec, Piotr Gębara, Patryk Włodarczyk, Aleksandra Kolano-Burian
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Driving next generation manufacturing through advanced metals characterisation capability Scr. Mater. (IF 6.0) Pub Date : 2024-02-03 A.T. Clare, M. Seita, A. Speidel, P. Collins, M. Clark
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A unique {332}<113> twin to α″ martensite transition during twin propagation in a Ti-12wt.% Mo alloy with micro-segregation Scr. Mater. (IF 6.0) Pub Date : 2024-02-03 Xin Ji, Satoshi Emura, Koichi Tsuchiya
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Oxidation resistance of Al-containing refractory high-entropy alloys Scr. Mater. (IF 6.0) Pub Date : 2024-01-31 Elaf A. Anber, David Beaudry, Charlie Brandenburg, Sebastian Lech, Lavina Backman, Daniel L. Foley, Emily L. Wang, Michael Joseph Waters, Loic Perriere, Jean- Philippe Couzinie, James M. Rondinelli, Elizabeth Opila, Mitra L. Taheri
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Solid breeder material crystal structure evolution due to Li burn up–Loss of crystal stability Scr. Mater. (IF 6.0) Pub Date : 2024-01-31 G.D. Samolyuk, A.J. Barker, Y.N. Osetskiy, P.D. Edmondson
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Characterization of a magnetic shape memory actuating element manufactured by laser ablation Scr. Mater. (IF 6.0) Pub Date : 2024-02-02 Andrey Saren, Aditya Kumthekar, Ville Laitinen, Kari Ullakko
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Surface oxide layer strengthening and fracture during flattening of powder particles Scr. Mater. (IF 6.0) Pub Date : 2024-02-02 Qi Tang, Yuji Ichikawa, Mostafa Hassani
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High thermoelectric performance of PbSe via a synergistic band engineering and dislocation approach Scr. Mater. (IF 6.0) Pub Date : 2024-02-02 Dan Zhang, Ping He, Guannan Liu, Ruiqi Zhong, Fang Xu, Junyou Yang, Yubo Luo, Shufang Wang
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Large low-stress elastocaloric effect in Ti-Zr-Cr-Sn Scr. Mater. (IF 6.0) Pub Date : 2024-02-01 Hua-You Xiang, Yan-Xin Guo, Xiaoli Zhao, Zongbin Li, Bo Yang, Nan Jia, Hai-Le Yan, Liang Zuo
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High-pressure structural and transport studies of orthorhombic Sm2Ru3Ge5 compound Scr. Mater. (IF 6.0) Pub Date : 2024-02-01 Rajkumar Sokkalingam, Govindaraj Lingannan, Muthukumaran Sundaramoorthy, C.N. Kuo, C.S. Lue, Arumugam Sonachalam, Boby Joseph
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Orientation relationships of impact-induced phase transformation in high entropy alloy HfZrTiTa0.53 Scr. Mater. (IF 6.0) Pub Date : 2024-02-01 N.B. Zhang, Y. Cai, D. Fan, X.J. Zhao, L. Lu, Y. Tang, Y.X. Li, S.N. Luo
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Exploring the distinctive role of REFe2 (RE=rare earth) phase in sintered and hot-deformed Ce-containing Nd-Fe-B magnets Scr. Mater. (IF 6.0) Pub Date : 2024-01-28 Xuefeng Liao, Weiwei Zeng, Cifu Lu, Renheng Tang, Lizhong Zhao, Haoyang Jia, Xiaolian Liu, Xuefeng Zhang, Yuye Wu, Songmao Li, Zhongwu Liu, Qing Zhou
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Organometallic structure-based βCD@FeSe2/CoSe2 heterostructures cathodes for high-performance aluminum-ion battery Scr. Mater. (IF 6.0) Pub Date : 2024-01-28 Yunhai Hu, Honglai Li, Xiaohui Zhao, Wenming Zhang, Zhanyu Li
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Quantitative modeling of autotempering effects in martensitic steels Scr. Mater. (IF 6.0) Pub Date : 2024-01-25 M.C. Rupinen, M.J. Jacobs, E.B. Damm, A.J. Clarke, J.G. Speer
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Incommensurate modulated structure and nano-sized γ′ phase induced by Fe during creep at 650 ℃ in Nickel-based model alloys Scr. Mater. (IF 6.0) Pub Date : 2024-01-25 Shaowei Li, Fang Liu, Tianxiao Si, Wenru Sun