
样式: 排序: IF: - GO 导出 标记为已读
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Void growth in ductile materials with realistic porous microstructures Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-30 A.R. Vishnu, G. Vadillo, J.A. Rodríguez-Martínez
In this paper, we have investigated void growth in von Mises materials which contain realistic porous microstructures. For that purpose, we have performed finite element calculations of cubic unit-cells which are subjected to periodic boundary conditions and include porosity distributions representative of three additively manufactured metals. The initial void volume fraction in the calculations varies
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A new anisotropic-asymmetric yield criterion covering wider stress states in sheet metal forming Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-26 Yong Hou, Junying Min, Ali Abd El-Aty, Heung Nam Han, Myoung-Gyu Lee
The stress state-dependent plastic anisotropy of sheet metals has drawn significant attention. Nevertheless, existing phenomenological plasticity models limitedly capture the distinctive yield strengths and plastic flow (r-values) under a wide range of stress states covering uniaxial tension (UT), equi-biaxial tension (EBT), uniaxial compression (UC), plane strain tension (PS), and pure shear (SH)
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A two-surface contact model for DEM and its application to model fatigue crack growth in cemented materials Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-22 Vinh T. Le, Khoa M. Tran, Jayantha Kodikara, Didier Bodin, James Grenfell, Ha H. Bui
This paper proposes a modelling approach that combines the discrete element method (DEM) and a novel bonded contact model to characterise the fatigue response of cemented materials. While DEM is commonly used to simulate bonded materials undergoing cracking, the centrepiece of the present method is the development of the novel bonded fatigue model. This new model couples damage mechanics and bounding
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The effect of small orientation deviation from [001] to [011] on high-temperature creep properties of nickel-based single crystal Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-20 Jiapo Wang, Jianwei Liang, Dongxu Zhang, Yan Peng, Zhixun Wen
Having regard to the inherent crystal anisotropy characteristic of nickel-based single crystal and the actual industrial manufacture, and application of the turbine blade, a trade-off between orientation deviation and performance demands that attention should be paid to estimating the influences of orientation deviation from [001] to [011] on the mechanical properties of the nickel-based single crystal
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Effect of grain size on critical twinning stress and work hardening behavior in the equiatomic CrMnFeCoNi high-entropy alloy Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-25 Christian Wagner, Guillaume Laplanche
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Molecular dynamics simulation of twin nucleation and growth in Ni-based superalloys Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-15 Valery V. Borovikov, Mikhail I. Mendelev, Timothy M. Smith, John W. Lawson
Micro-twinning is the major creep deformation mechanism in most Ni-based superalloys at temperatures above 700 °C. Nevertheless, many aspects of twin nucleation and growth remain unexplored. The Kolbe mechanism for micro-twinning is currently widely accepted in the community to explain these processes, based on post mortem TEM characterization and indirect theoretical estimations. However, this does
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Statistical analysis of slip transfer in Al alloy based on in-situ tensile test and high-throughput computing method Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-20 Xiaojiao You, Jian Yang, Chengyi Dan, Qiwei Shi, Shengyi Zhong, Haowei Wang, Zhe Chen
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Modelling of dislocations, twins and crack-tips in HCP and BCC Ti Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-18 Tongqi Wen, Anwen Liu, Rui Wang, Linfeng Zhang, Jian Han, Han Wang, David J. Srolovitz, Zhaoxuan Wu
Ti exhibits complex plastic deformation controlled by active dislocation and twinning systems. Understandings on dislocation cores and twin interfaces are currently not complete or quantitative, despite extensive experimental and simulation studies. Here, we determine the dislocation core, twin, and crack properties in both HCP and BCC Ti using a Deep Potential (DP), DFT and linear elastic fracture
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Lode-dependent anisotropic-asymmetric yield function for isotropic and anisotropic hardening of pressure-insensitive materials. Part I: Quadratic function under non-associated flow rule Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-17 Yanshan Lou, Jeong Whan Yoon
It is challenging to precisely model the complicated plastic deformation of metals, including anisotropy in strength and plastic deformation, strength differential effect, anisotropic hardening, etc. A new approach is proposed to extend anisotropic yield functions into asymmetric ones by introducing a Lode dependent function. The approach is applied to the Hill48 function with a Lode-dependent function
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Machine learning-enabled identification of micromechanical stress and strain hotspots predicted via dislocation density-based crystal plasticity simulations Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-13 Adnan Eghtesad, Qixiang Luo, Shun-Li Shang, Ricardo A. Lebensohn, Marko Knezevic, Zi-Kui Liu, Allison M. Beese
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Effects of lattice distortion and chemical short-range ordering on the incipient behavior of Ti-based multi-principal element alloys: MD simulations and DFT calculations Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-07 Xiangkai Zhang, Jie Yan, Yen-Hsiang Chen, Ruslan Kevorkyants, Tongqi Wen, Xun Sun, Alice Hu, J.C. Huang
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On adiabatic shear instability in impacts of micron-scale Al-6061 particles with sapphire and Al-6061 substrates Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-12 Qiyong Chen, Wanting Xie, Victor K. Champagne, Aaron Nardi, Jae-Hwang Lee, Sinan Müftü
Impact mechanics of micron-scale, Al-6061 particles on sapphire and Al-6061 substrates were investigated experimentally and through simulations. Particle impact experiments were carried out by using the laser induced projectile impact test (LIPIT) and the coefficient of restitution was evaluated for impact velocities in the range of 50–950 m/s. Bonding was observed only in Al-on-Al impacts with impact
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Inception of macroscopic shear bands during hot working of aluminum alloys Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-06 Aditya Prakash, Tawqeer Nasir Tak, Namit N. Pai, Harita Seekala, S.V.S. Narayana Murty, P.S. Phani, Sivasambu Mahesh, P.J. Guruprasad, Indradev Samajdar
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Machine learning-driven stress integration method for anisotropic plasticity in sheet metal forming Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-07 Piemaan Fazily, Jeong Whan Yoon
This study proposes a machine learning-based constitutive model for anisotropic plasticity in sheet metals. A fully connected deep neural network (DNN) is constructed to learn the stress integration procedure under the plane stress condition. The DNN utilizes the labeled training data for feature learning, and the respective dataset is generated numerically based on the Euler-backward method for the
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Bidirectional transformation enabled improvement in strength and ductility of metastable Fe50Mn30Co10Cr10 complex concentrated alloy under dynamic deformation Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-05 Roopam Jain, Venkitanarayanan Parameswaran, Krishanu Biswas, N.P. Gurao
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Atomistically-informed hardening and kinetics models of helium bubble in irradiated tungsten Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-28 Changqiu Ji, Jianqiao Hu, Zhuo Zhuang, Yinan Cui
In fusion reactor environment, helium bubble acts as a crucial inducement to the performance degradation of plasma facing tungsten, leading to irradiation hardening and embrittlement. The dislocation interacted with helium bubble directly controls the service reliability and safety of irradiated materials. However, the fundamental question regarding the mechanism and quantitative model of this interaction
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Martensitic transformation induced planar deformation of AlN nanoprecipitates in high nitrogen stainless steels Int. J. Plasticity (IF 8.5) Pub Date : 2023-05-02 Yumeng Zhang, Yixuan Hu, Huabing Li, Yipeng Gao, Yabo Wang, Hao Feng, Yao Shen, Kolan Madhav Reddy, Zhouhua Jiang, Xiaodong Wang, Mingwei Chen
Boosting the applications of high nitrogen steels requires delicate control of detrimental brittle AlN precipitates which often initiate cracking and thus degrade overall mechanical performance. Here we report that stacking faults in nano-sized AlN precipitates can be activated by martensitic transformation during quenching in a high nitrogen martensitic stainless bearing steel. Atomic-scale structure
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Automated slip system identification and strain analysis framework using high-resolution digital image correlation data: Application to a bimodal Ti-6Al-4V alloy Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-29 Haoyu Hu, Fabien Briffod, Takayuki Shiraiwa, Manabu Enoki
Statistical analysis of slip system identification and quantitative study on local plasticity is crucial to understand the collective deformation by the sub-grain-scale slip activities in polycrystalline metallic materials. In this study, an automated framework for identifying slip system and assessing strain localization of slip bands termed ASSISL (automated Slip System Identification and Strain
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Unraveling the deformation behavior of the Fe45Co25Ni10V20 high entropy alloy Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-23 Y.X. Li, Raymond Kwesi Nutor, Q.K. Zhao, X.P. Zhang, Q.P. Cao, S.S. Sohn, X.D. Wang, S.Q. Ding, D.X. Zhang, H.F. Zhou, J.W. Wang, J.Z. Jiang
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Shear localization in polycrystalline metal at high-strain rates with dynamic recrystallization: Crystal plasticity modeling and texture effect Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-18 Wen An, Chuan-zhi Liu, Qi-lin Xiong, Zhenhuan Li, Xicheng Huang, Tao Suo
Shear localization is an important failure mode, or even the dominant mode in metals at high-strain rates. However, it is a great challenge to accurately predict the occurrence and evolution of shear localization in metals at the high-strain rate deformation. Here, a dislocation-based crystal plasticity constitutive model with a crucial mechanism of shear instability, namely dynamic recrystallization
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A mesoscopic damage model for the low-cycle fatigue of an extruded magnesium alloy Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-17 Ziyi Wang, Shengchuan Wu, Yu Lei, Hang Li, Chao Yu, Kun Zhou, Xiqiao Feng, Guozheng Kang
This paper presents a novel mesoscopic damage model to characterize the low-cycle fatigue damage evolution of an extruded AZ31 magnesium (Mg) alloy, taking into account the effect of twinning. The damage caused by the slip bands (SBs)–twin boundaries (TBs) and SBs–grain boundaries (GBs) interactions is treated based on the Tanaka–Mura model and the Eshelby inclusion theory. Strain energy values at
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A new simplified distortional hardening model for nonlinear strain paths Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-20 Hyunsung Choi, Jeong Whan Yoon
The material behaviors under nonlinear strain paths have been successfully explained through distortional hardening model in which the yield surface is mainly rotating and contracting as plastic deformation occurs. In order to apply to industrial applications, it is beneficial for any constitutive model including distortional hardening model to have simplicity of equation, which is related to numerical
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Effect of hydrogen on plasticity of α-Fe: A multi-scale assessment Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-17 Pranav Kumar, Mohit M. Ludhwani, Sambit Das, Vikram Gavini, Anand Kanjarla, Ilaksh Adlakha
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Training material models using gradient descent algorithms Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-11 Tianju Chen, Mark C. Messner
High temperature design requires accurate constitutive models to describe material inelastic deformation and failure behavior. Oftentimes, calibrating accurate models devolves into the problem of fitting the model parameters against experimental test data. Here, we present the pyopmat package, an open source framework for calibrating constitutive models against experiment data subjected to various
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Deformation mechanism of a strong and ductile maraging steel investigated using in-situ X-ray synchrotron diffraction Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-11 Hu Li, Yong Liu, Weijiang Zhao, Bin Liu, Aki Tominaga, Takehisa Shobu, Daixiu Wei
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On the origin of the strain hardening mechanisms of Ni20Cr alloy manufactured by laser powder bed fusion Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-15 Shubham Sanjay Joshi, Clément Keller, Lydie Mas, Williams Lefebvre, Eric Hug, Jean-Philippe Couzinie
Additively Manufactured (AM) metallic alloys differ from their conventionally produced counterparts by complex multi-scaled microstructures leading to deeply modified mechanical behavior. The characterization of these new links between microstructure and mechanical properties is of first importance. Nevertheless, many alloys produced by Laser Powder Bed Fusion (LPBF) process exhibit multi-phase microstructures
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A multi-scale diffusional-mechanically coupled model for super-elastic NiTi shape memory alloy wires in hydrogen-rich environment Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-14 Chao Yu, Han M Jiang, Di Song, Yilin Zhu, Guozheng Kang
The functional devices made by NiTi shape memory alloys (SMAs) are often serviced in hydrogen (H)-rich environment. Recently experimental results showed that the martensite transformation (MT) of NiTi SMA changed strongly after charging H, which originates from the H diffusion in the material and an additional transformation resistance caused by the absorbed H atoms. In this work, a multi-scale di
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A physically-based constitutive model for a novel heat resistant martensitic steel under different cyclic loading modes: Microstructural strengthening mechanisms Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-10 Kai Song, Kaimeng Wang, Lei Zhao, Lianyong Xu, Ninshu Ma, Yongdian Han, Kangda Hao, Libin Zhang, Yalin Gao
Cyclic responses of a novel heat resistant martensitic steel, 9Cr3Co3W1CuVNbB steel, under different loading modes were studied to reveal its complex strengthening mechanisms at high temperature. Based on the experimental observations, dislocation strengthening, precipitation strengthening by M23C6 phase, MX phase, and Cu-rich phase, and subgrain boundary strengthening were the main mechanisms for
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Microstructure- and damage-nucleation-based crystal plasticity finite element modeling for the nucleation of multi-type voids during plastic deformation of Al alloys Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-07 P.F. Gao, M.Y. Fei, M. Zhan, M.W. Fu
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Slip Band Evolution Behavior near Circular Hole on Single Crystal Superalloy: Experiment and Simulation Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-06 Zixu Guo, Ziyuan Song, Xin Ding, Kaimin Guo, Hongzhuo Liu, Han Yan, Dawei Huang, Xiaojun Yan
Circular holes on single crystal (SX) superalloys are widely utilized as film cooling structures on SX turbine blades, while their failure is a persistent issue. This study presents in-situ tests using digital image correlation (DIC) to reveal the slip band (SB) evolution behavior near the circular hole on SX superalloy, and proposes a mechanism-based model to capture the SB-associated evolutions of
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Mesoscopic unit cell analysis of ductile failure under plane stress conditions Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-05 Mayank Chouksey, Shyam M. Keralavarma
Ductile failure under plane stress conditions is analyzed at the meso-scale using periodic unit cell model simulations of void growth in a plastically deforming matrix. Equivalent strains to failure by the onset of plastic instability at the macro-scale are estimated using the loss of ellipticity criterion for the equilibrium equations. Failure loci obtained from the cell model simulations are compared
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A new micromechanical damage model for quasi-brittle geomaterials with non-associated and state-dependent friction law Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-05 Lun-Yang Zhao, Zhao-Min Lv, Yuan-Ming Lai, Qi-Zhi Zhu, Jian-Fu Shao
In this paper, we shall present a new micromechanical damage model for capturing the mechanical behaviors of quasi-brittle geomaterials under a wide range of compressive stress. Two essential coupled non-linear mechanisms are taken into account: plastic deformation related to frictional sliding along the microcrack surfaces, and microscopic damage induced by the initiation and propagation of microcracks
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Bridging microscale to macroscale mechanical property measurements of FeCrAl alloys by crystal plasticity modeling Int. J. Plasticity (IF 8.5) Pub Date : 2023-04-05 Mingyu Gong, Dongyue Xie, Tianyi Sun, Xinghang Zhang, Lin Shao, Jian Wang
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Dislocation pileups in small grains Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-28 R. Schouwenaars, L.A.I. Kestens
While the grain size effect (GSE) is universally observed in polycrystalline metals and alloys, extended dislocation pileups (DPUs) at grain boundaries (GBs) are rarely observed. Although this discrepancy was noticed over 50 years ago, DPUs are still widely accepted as the explanation for the GSE, often expressed as the Hall-Petch (HP) relationship. To provide a quantitative assessment of the pileup
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Study on the crack nucleation mechanism of Ti-2Al-2.5Zr alloy in low cycle fatigue: Quasi in-situ experiments and crystal plasticity simulation Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-31 Shengkun Wang, Zuoliang Ning, Peng Li, Mengqi Li, Qiang Lin, Hao Wu, Gang Chen
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Influence of kinetic effect on interaction between edge dislocation and irradiated dislocation loops in BCC Tantalum Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-29 Qifan Bao, Zhenhuan Li, Bida Zhu, Shuang Liang, Jianchang Zhu, Minsheng Huang, Lv Zhao, Yaxin Zhu
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Role of temperature and preexisting dislocation network on the shock compression of copper crystals Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-29 I.A. Bryukhanov
Shock wave experiments show that many annealed face-centered cubic metals exhibit an anomalously increasing yield strength with temperature at high strain rates. Such an increase is usually associated with the multiplication of dislocations in the phonon friction mode, which slows with temperature. However, the effect of temperature on the structure of the shock wave and the yield strength of metal
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Creep-fatigue damage mechanisms and life prediction based on crystal plasticity combined with grain boundary cavity model in a nickel-based superalloy at 650°C Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-28 Kai-Shang Li, Run-Zi Wang, Xian-Cheng Zhang, Shan-Tung Tu
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Modelling the influence of magnetic fields to the viscoelastic behaviour of soft magnetorheological elastomers under finite strains Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-25 Bochao Wang, Roger Bustamante, Leif Kari, Haoming Pang, Xinglong Gong
Isotropic soft magneto-rheological elastomers (s-MRE) are polymer-based composites where magnetically soft particles are randomly distributed in the elastomer matrix. Under a magnetic field, a strong modulus magnetic stiffening effect and a magnetostriction performance is exhibited for isotropic s-MRE, offering a wide application potential in vibration control, soft robotics and haptic displays. In
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Two laser beam modulation of microstructure and residual stress field in cold sprayed Al alloy for recovering fatigue performance Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-21 Xinlei Pan, Weifeng He, Liucheng Zhou, Song Shu, Xiangyu Ding, Qiang Wang, Shifeng Wen, Nan Li, Min Yi, Yiqi Zhu, Jian Nan
The cold spray (CS) process has been demonstrated to be an attractive additive manufacturing technology for the development of freeforms and coatings from temperature-sensitive materials. However, owing to the lower bonding strength and inhomogeneous residual stress field distribution, the fatigue performance of CS deposition cannot satisfy the requirements of numerous engineering conditions. This
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Crystal plasticity analysis of fatigue-creep behavior at cooling holes in single crystal Nickel based gas turbine blade components Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-20 Christos Skamniotis, Nicolò Grilli, Alan C.F. Cocks
We build a crystal plasticity finite element framework to investigate slip localisation and fatigue-creep behaviour at the cooling holes of single crystal Nickel (Ni) based components under cyclic thermomechanical loading. The total slip rate is decomposed into a thermally activated dislocation glide rate which dominates at moderate/low temperatures (T) and/or high stresses, and a climb rate which
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Modeling Shock-induced Void Collapse in Single-crystal Ta Systems at the Mesoscales Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-17 Sergey Galitskiy, Avanish Mishra, Avinash M. Dongare
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Enhanced strength-ductility synergy of medium-entropy alloys via multiple level gradient structures Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-12 Xu Zhang, Yang Gui, Minjie Lai, Xiaochong Lu, Ji Gu, Feng Wang, Tao Yang, Zhangwei Wang, Min Song
The microstructures, mechanical properties, and deformation substructures of gradient Mo0.3NiCoCr medium-entropy alloys (MEAs) with very coarse grain size created by pre-torsion have been investigated. The strength of MEAs increases with the increase of torsion angle, while the tensile elongation nearly remains the same, suggesting the enhanced strength-ductility synergy. The initial dislocation density
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A data driven approach for cross-slip modelling in continuum dislocation dynamics Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-17 Vignesh Vivekanandan, Benjamin Anglin, Anter El-Azab
Cross-slip is a thermally activated process by which screw dislocation changes its glide plane to another slip plane sharing the same Burgers vector. The rate at which this process happens is determined by a Boltzmann type expression that is a function of the screw segment length and the stress acting on the dislocation. In continuum dislocation dynamics (CDD), the information regarding the length
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A multiscale model for multiaxial inelastic behavior of elastomeric particulate composites Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-13 Mahrez Saadedine, Fahmi Zaïri, Nourdine Ouali, Thanh-Tam Mai, Kenji Urayama, Abderrahman Tamoud, Amar Mesbah
This article addresses the problem of the multiscale constitutive representation of the multiaxial inelastic behavior of elastomeric particulate composites. A fully three-dimensional model is proposed within a micromechanical treatment to describe the multiaxial inelastic response in relation to the reinforcement mechanisms. A network decomposition based on the tube confinement theory is used to consider
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Enhanced plasticity due to melt pool flow induced uniform dispersion of reinforcing particles in additively manufactured metallic composites Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-15 Ge Wang, Yanming Zhang, Bingkun Zou, Yang Liu, Shiqi Zheng, Xiaochun Li, Wentao Yan, Zan Li, Y. Morris Wang
Additive manufacturing has gained increasing interest to fabricate metal matrix composites. Particle agglomeration remains a critical challenge and can severely compromise the mechanical properties, in particular tensile ductility. Here we investigated and utilized laser powder-bed-fusion (L-PBF) to uniformly disperse particles in metal matrices, taking advantages of particle flow dynamics during melting
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Twinning-induced plasticity with multiple twinning modes and disclinations in Mg alloys Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-15 Yipeng Gao, Lei Zhao, Min Zha, Chun-Feng Du, Zhen-Ming Hua, Kai Guan, Hui-Yuan Wang
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A concise analytical framework for describing asymmetric yield behavior based on the concept of shape functions Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-11 Yao Zhou, Qi Hu, Jun Chen
A fully analytical framework of yield criterion is constructed under non-associated flow rule to describe asymmetric yielding and anisotropic hardening based on the concept of shape functions. For the yield function, eight parameters are identified by employing the corresponding tensile and compressive hardening functions along the four directions, i.e., uniaxial directions along 0°, 45°, 90° in relation
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Exploring nonlinear strengthening in polycrystalline metallic materials by machine learning methods and heterostructure design Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-10 Jinliang Du, Jie Li, Yunli Feng, Ying Li, Fucheng Zhang
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Dislocation density transients and saturation in irradiated zirconium Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-07 Andrew R. Warwick, Rhys Thomas, M. Boleininger, Ö. Koç, G. Zilahi, G. Ribárik, Z. Hegedues, U. Lienert, T. Ungar, C. Race, M. Preuss, P. Frankel, S.L. Dudarev
Zirconium alloys are widely used as the fuel cladding material in pressurized water reactors, accumulating a significant population of defects and dislocations from exposure to neutrons. We present and interpret synchrotron microbeam X-ray diffraction measurements of proton-irradiated Zircaloy-4, where we identify a transient peak and the subsequent saturation of dislocation density as a function of
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Physics-motivated fractional viscoelasticity model for dynamic relaxation in amorphous solids Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-05 F. Zhu, G.H. Xing, G.J. Lyu, L.T. Zhang, Yun-Jiang Wang, Y. Yang, J.M. Pelletier, J.C. Qiao
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A microstructure-based three-scale homogenization model for predicting the elasto-viscoplastic behavior of duplex stainless steels Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-05 Eyram Tsekpuia, Adrien Guery, Nathalie Gey, Stéphane Berbenni
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Role of low-level void swelling on plasticity and failure in a 33 dpa neutron-irradiated 304 stainless steel Int. J. Plasticity (IF 8.5) Pub Date : 2023-03-02 H.T. Vo, D. Frazer, A.A. Kohnert, S. Teysseyre, S. Fensin, P. Hosemann
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A unified ductile fracture criterion suitable for sheet and bulk metals considering multiple void deformation modes Int. J. Plasticity (IF 8.5) Pub Date : 2023-02-28 Lihuang Zheng, Zhongjin Wang, Bao Meng, Min Wan
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Deep active learning for constitutive modelling of granular materials: From representative volume elements to implicit finite element modelling Int. J. Plasticity (IF 8.5) Pub Date : 2023-02-28 Tongming Qu, Shaoheng Guan, Y.T. Feng, Gang Ma, Wei Zhou, Jidong Zhao
Constitutive relation remains one of the most important, yet fundamental challenges in the study of granular materials. Instead of using closed-form phenomenological models or numerical multiscale modelling, machine learning has emerged as an alternative paradigm to revolutionise the constitutive modelling of granular materials. However, deep neural networks (DNNs) require massive training data and
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The optimum grain size for strength-ductility combination in metals Int. J. Plasticity (IF 8.5) Pub Date : 2023-02-27 Yanfei Wang, Chongxiang Huang, Xiaolong Ma, Jianfeng Zhao, Fengjiao Guo, Xiaotian Fang, Yuntian Zhu, Yueguang Wei
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Spatial and temporal evolution of localized deformation in NiTi tubes in a constant stress thermal cycle: Experiments and analysis Int. J. Plasticity (IF 8.5) Pub Date : 2023-02-26 Solon Tsimpoukis, Stelios Kyriakides, Chad M. Landis
A novel experimental setup is presented that allows for precise control of thermal and mechanical loads, and simultaneous monitoring of the temperature and the full-field deformation of small SMA structures that undergo phase transformations. The facility is used to conduct two experiments in which NiTi tubes are taken through a temperature cycle under constant load that leads to phase transformations
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Deformation-induced dynamic precipitation of 14H-LPSO structure and its effect on dynamic recrystallization in hot-extruded Mg-Y-Zn alloys Int. J. Plasticity (IF 8.5) Pub Date : 2023-02-25 Wei Liu, Yuhong Zhao, Yuntao Zhang, Chuan Shuai, Liwen Chen, Zhiquan Huang, Hua Hou
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Size effect on the cyclic deformation behavior of superalloy ultrathin sheet: Characterization and multiscale modelling Int. J. Plasticity (IF 8.5) Pub Date : 2023-02-14 Weilin He, Bao Meng, Lihuang Zheng, Yanfeng Yang, Min Wan
Superalloy ultrathin sheets have high strength, outstanding oxidation resistance, corrosion resistance and fatigue performance, and its thin-walled components occupy a considerable proportion in aeroengines. In the microforming process of aeroengine thin-walled components, the superalloy ultrathin sheet is often deformed under complex loading states and shows obvious springback. However, the forming
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Correlated structure viscoplastic self-consistent polycrystal plasticity: Application to modeling strain rate sensitive deformation of Ti-6Al-4 V Int. J. Plasticity (IF 8.5) Pub Date : 2023-02-15 Iftekhar A. Riyad, Brandon A. McWilliams, Brahmananda Pramanik, Marko Knezevic
This paper presents a multi-level viscoplastic self-consistent (VPSC) model for correlated structures (CS-VPSC). A polycrystalline aggregate response is homogenized over inclusions, which are linearized using the generalized affine scheme. Response of the inclusions is that of either a single grain or a correlated structure of multiple single crystals. The single crystal response is a strain rate adjusted