Article
Materials Science, Multidisciplinary
Anas Abu-Odeh, Mark Asta
Summary: This study used atomistic simulations to investigate the influence of short-range ordering (SRO) on cross-slip in single-phase face-centered cubic solid solution alloys. Results showed that the activation barriers for cross-slip depend on the state of SRO in the alloy and the presence of anti-phase boundaries in the slip plane, indicating an increase in cross-slip energy barrier with the onset of SRO and a reduction in dynamic recovery.
Article
Engineering, Mechanical
Fanshi Meng, Emilie Ferrie, Christophe Depres, Marc Fivel
Summary: Through 3D discrete dislocation dynamic simulations, the complex transformation process of dislocation microstructure and the formation of slip bands in Cu under cyclic loading conditions were studied. The linear relationship between the volume fraction of slip bands and the imposed plastic strain amplitude was obtained, and the stability of the slip bands was verified by decreasing the plastic strain amplitude after the saturation regime.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Multidisciplinary Sciences
Yifan Wang, Wei Cai
Summary: This study reveals the microscopic mechanisms of cross-slip of screw dislocations in crystalline solids using molecular dynamics simulation and identifies the influence of anharmonic effects. This finding contributes to a better understanding of stress-driven thermally activated processes in solids.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Materials Science, Multidisciplinary
M. Longsworth, M. Fivel
Summary: The cross-slip rate of screw segments in dislocation dynamics simulations was calculated using a model based on the harmonic transition state theory and the Meyer-Neldel rule. The results were in quantitative agreement with atomistic simulations.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Zhipeng Sun, Fuzhi Dai, Wenzheng Zhang
Summary: In this study, molecular dynamics simulation was used to reveal the interaction processes between lattice dislocations and IPBs, including image force, slip transmission, and other local reactions. The research found that the image force always attracts BCC lattice dislocations towards the IPB, and observed four different dislocation/IPB interaction results. Detailed analysis was conducted on influencing factors such as resolved shear stress, continuity of slip systems, local dislocation reaction, and dislocation core spread. This study provides new insights into how IPBs can impact plastic deformation in alloy systems.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Zhipeng Li, Jianfei Zhang, Yadi Zhai, Jiabao Zhang, Xiaodong Wang, Ze Zhang, Shengcheng Mao, Xiaodong Han
Summary: In-situ TEM nanoindentation reveals the characteristics of dislocation pinning, pile-ups and cross-slip along the twinning boundary in a twinned FCC metal for the first time.
MATERIALS RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Yang Li, Sabyasachi Chatterjee, Enrique Martinez, Nasr Ghoniem, Giacomo Po
Summary: In the model, basal-to-prismatic cross-slip is energetically favorable, while prismatic-to-basal cross-slip is only activated under specific conditions. The proposed mechanism for basal slip of <a> screw dislocations in Zr involves the formation and lateral migration of kink pairs formed by double cross-slip.
Article
Chemistry, Multidisciplinary
Zachary Barringer, Jie Jiang, Xiaowen Shi, Elijah Schold, Anastasios Pateras, S. Cipiccia, C. Rau, Jian Shi, Edwin Fohtung
Summary: The defects in V2O3 grown via a flux method were studied, revealing large flake-like particles with spiral growth characteristics and smaller particles without the characteristic screw dislocation of spiral growth. The identification and measurement of various defects were done using Bragg coherent diffractive imaging.
Article
Chemistry, Multidisciplinary
Benjamin P. A. Gabriele, Craig J. Williams, Matthias E. Lauer, Brian Derby, Aurora J. Cruz-Cabeza
Summary: Nanoindentation measurements and atomic force microscopy imaging revealed the mechanical properties and surface characteristics of different crystal faces of CBZ form III, showing anisotropic stiffness and molecular flexibility leading to unique behaviors during indentation. Molecular dynamics simulations further confirmed the primary slip plane and the role of hydrogen bonding in the material's mechanical response on the (020) face.
Article
Materials Science, Multidisciplinary
Lei Zhang, Honggang Zhang, Yanzhuo Liu, Shuai Yuan, Jinhui Wang, Lijia Chen, Peipeng Jin
Summary: In this study, the microstructure and deformation behavior of extruded Mg-6Al-1Zn-1.1Sc alloy were investigated. The results showed that the degree of dynamic recrystallization increased as the sampling position approached the outlet of the extrusion die. The alloy exhibited high yield strength due to the combined effects of grain boundary strengthening, texture strengthening, and secondary phase strengthening. The VPSC model successfully simulated the tensile deformation of the extruded alloy with a specific fiber texture.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Hui Wang, Zhaoxi Cao, Ziyuan Gao, Cunyu Wang, Jianxiong Liang, Andy Godfrey, Ling Zhang, Guilin Wu, Wenquan Cao
Summary: The deformation response of a (Nb, V) micro-alloyed FeMnAlC low density steel has been investigated as a function of grain size. Tensile testing and electron microscopy were used to characterize the mechanical properties and microstructure. The results show that the yield stress is strongly dependent on the initial grain size, while the friction stress and Hall-Petch slope vary with the level of applied tensile strain. Based on these findings, a model is proposed to simulate the stress-strain curves during tensile deformation of the low-density steel.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Zhihua Huang, Chaoming Yang, John E. Allison, Liang Qi, Amit Misra
Summary: The study investigated the interaction between dislocations and precipitates in a magnesium-neodymium alloy, with differing behavior observed for different types of dislocations and precipitates. It was found that screw dislocations could overcome precipitates through a double cross-slip mechanism, while edge dislocations were unable to bypass precipitates and instead bowed around or cross-slipped.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Changqing Ye, Guisen Liu, Kaiguo Chen, Jingnan Liu, Jianbo Hu, Yuying Yu, Yong Mao, Yao Shen
Summary: The mechanical response of metals depends on the strain rate and shows significant changes across a wide range of strain rates. The authors developed a unified crystal plasticity model for face-centered cubic (fcc) metals to describe their mechanical response at different strain rates.
Article
Engineering, Mechanical
Theodore Zirkle, Ting Zhu, David L. McDowell
Summary: Experiments and theories have shown that the evolution of intragranular back stress in FCC metals and alloys depends primarily on the characteristics and development of dislocation substructure. A micromechanically-based back stress evolution law was derived and implemented in a crystal plasticity framework for FCC metals, showing good agreement with experiments on stainless steel 316L. Ratcheting phenomena are attributed to dislocation substructure formation, dissolution, and stabilization within this physically-based framework.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Nanoscience & Nanotechnology
Wei Jiang, Xuzhou Gao, Yazhou Guo, Xiang Chen, Yonghao Zhao
Summary: In this study, the dynamic impact behavior and deformation mechanisms of a Cr26Mn20Fe20Co20Ni14 high-entropy alloy were systematically explored. The alloy exhibited uniform plastic deformation and a significant strain rate dependence in yield strength. Microstructural analyses revealed a transition in deformation mechanisms and interactions between different dislocations, stacking faults, and twins in strengthening the material. This work provides a comprehensive understanding of the high-entropy alloy's behavior and strengthening mechanisms.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Biomedical
S. Tupin, J. Molimard, V. Cenizo, T. Hoc, B. Sohm, H. Zahouani
ANNALS OF BIOMEDICAL ENGINEERING
(2016)
Article
Orthopedics
Jean-Charles Auregan, Aurelien Frison, Thierry Begue, Didier Hannouche, Catherine Bosser, Morad Bensidhoum, Thierry Hoc
INTERNATIONAL ORTHOPAEDICS
(2017)
Article
Engineering, Biomedical
A. Levillain, M. Orhant, F. Turquier, T. Hoc
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2016)
Article
Biophysics
A. Levillain, H. Magoariec, C. Boulocher, A. Decambron, V. Viateau, T. Hoc
JOURNAL OF BIOMECHANICS
(2017)
Article
Engineering, Biomedical
A. Levillain, H. Magoariec, C. Boulocher, A. Decambron, V. Viateau, T. Hoc
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2017)
Article
Engineering, Mechanical
Thomas Rousseau, Cecile Nouguier-Lehon, Philippe Gilles, Thierry Hoc
INTERNATIONAL JOURNAL OF PLASTICITY
(2018)
Article
Engineering, Biomedical
Laure Astruc, Maurice De Meulaere, Jean-Francois Witz, Vit Novacek, Frederic Turquier, Thierry Hoc, Mathias Brieu
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2018)
Article
Engineering, Biomedical
Sarah Pragnere, Caroline Boulocher, Ophelie Pollet, Catherine Bosser, Aurelie Levillain, Magali Cruel, Thierry Hoc
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Laure Astruc, Annie Morch, Jean-Francois Witz, Vit Novacek, Frederic Turquier, Thierry Hoc, Mathias Brieu
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2019)
Article
Engineering, Biomedical
S. Pragnere, J-C Auregan, C. Bosser, A. Linglart, M. Bensidhoum, T. Hoc, C. Nouguier-Lehon, C. Chaussain
Summary: Osteogenesis imperfecta is a rare genetic disorder of the skeleton, with research showing an increase in dentin hardness and mineral content in patients with mild form of the disease, despite about half of patients showing no obvious oral manifestations.
ACTA BIOMATERIALIA
(2021)
Article
Orthopedics
Cartherine Bosser, Jean Charles Auregan, Morad Bensidhoum, Thierry Hoc, Thierry Begue, Raphael Vialle, Cecile Nouguier-Lehon, Manon Bachy
Summary: In the early stages following ACL tear, there is significant impairment of cartilage poroelasticity without macroscopic changes. Over time, the deterioration of cartilage poroelasticity decreases. This severe degradation of poroelasticity may contribute to the development of microcracks within the cartilage, leading to further damage under physiological loading.
ORTHOPAEDICS & TRAUMATOLOGY-SURGERY & RESEARCH
(2022)
Article
Chemistry, Physical
Zhuang Xiong, Lea Rouquier, Christine Chappard, Manon Bachy, Xingrong Huang, Esther Potier, Morad Bensidhoum, Thierry Hoc
Summary: Scaffolds play a crucial role in bone tissue engineering by providing support and creating a suitable environment for cell growth and differentiation. Bone allografts extracted from human donors are considered promising scaffolds due to their mechanical and structural characteristics. This study used X-ray computed tomography (micro-CT) images to investigate the correlation between microarchitectural parameters and micromechanical properties of bone allografts. The results showed that the distribution and structure of trabecular bone at the microscopic level are the main factors determining its mechanical properties. A new parameter called DAEF was found to have a strong linear correlation with the bone's mechanical characteristics.
Review
Orthopedics
Jean-Charles Auregan, Catherine Bosser, Morad Bensidhoum, Thierry Begue, Thierry Hoc
EFORT OPEN REVIEWS
(2018)
Article
Orthopedics
R. Rieger, C. Boulocher, S. Kaderli, T. Hoc
BMC MUSCULOSKELETAL DISORDERS
(2017)
Article
Endocrinology & Metabolism
K. Pernelle, L. Imbert, C. Bosser, J-C. Auregan, M. Cruel, A. Ogier, P. Jurdic, T. Hoc
Article
Materials Science, Multidisciplinary
Y. Liu, K. Zweiacker, C. Liu, J. T. McKeown, J. M. K. Wiezorek
Summary: The evolution of rapid solidification microstructure and solidification interface velocity of hypereutectic Al-20at.%Cu alloy after laser melting has been studied experimentally. It was found that the formation of microstructure was dominated by eutectic, alpha-cell, and banded morphology grains, and the growth modes changed with increasing interface velocity.
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Julian Escobar, Miao Song, Jonova Thomas, Joshua Silverstein, Andrew Chihpin Chuang, Dileep Singh, Michael P. Brady, Yukinori Yamamoto, Thomas R. Watkins, Arun Devaraj
Summary: Castable alumina forming austenitic alloys exhibit superior creep life and oxidation resistance at high temperatures. This study reveals the mechanism behind the enhanced creep performance of these alloys by suppressing primary carbide formation and offers a promising alloy design strategy for high-temperature applications.
Article
Materials Science, Multidisciplinary
Jian Song, Qi Zhang, Songsong Yao, Kunming Yang, Houyu Ma, Jiamiao Ni, Boan Zhong, Yue Liu, Jian Wang, Tongxiang Fan
Summary: Recent studies have shown that achieving an atomically flat surface for metals can greatly improve their oxidation resistance and enhance their electronic-optical applications. Researchers have explored the use of graphene as a covering layer to achieve atomically flat surfaces. They found that high-temperature deposited graphene on copper surfaces formed mono-atomic steps, while annealed copper and transferred graphene on copper interfaces formed multi-atomic steps.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Materials Science, Multidisciplinary
P. Jannotti, B. C. Hornbuckle, J. T. Lloyd, N. Lorenzo, M. Aniska, T. L. Luckenbaugh, A. J. Roberts, A. Giri, K. A. Darling
Summary: This work characterizes the thermo-mechanical behavior of bulk nanocrystalline Cu-Ta alloys under extreme conditions. The experiments reveal that the alloys exhibit unique mechanical properties, behaving differently from conventional nanocrystalline Cu. They do not undergo grain coarsening during extrusion and exhibit behavior similar to coarse-grained Cu.
Article
Materials Science, Multidisciplinary
Yiqing Wei, Jingwei Li, Daliang Zhang, Bin Zhang, Zizhen Zhou, Guang Han, Guoyu Wang, Carmelo Prestipino, Pierric Lemoine, Emmanuel Guilmeau, Xu Lu, Xiaoyuan Zhou
Summary: This study proposes a new strategy to modify microstructure by phase regulation, which can simultaneously enhance carrier mobility and reduce lattice thermal conductivity. The addition of Cu in layered SnSe2 induces a phase transition that leads to increased grain size and reduced stacking fault density, resulting in improved carrier mobility and lower lattice thermal conductivity.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Materials Science, Multidisciplinary
X. Y. Xu, C. P. Huang, H. Y. Wang, Y. Z. Li, M. X. Huang
Summary: The limited slip systems of magnesium (Mg) and its alloys hinder their wide applications. By conducting tensile straining experiments, researchers discovered a rate-dependent transition in the dislocation mechanisms of Mg alloys. At high strain rates, glissile dislocations dominate, while easy-glide dislocations dominate at low strain rates. Abundant glissile dislocations do not necessarily improve ductility.
Article
Materials Science, Multidisciplinary
M. S. Szczerba, M. J. Szczerba
Summary: Inverse temperature dependences of the detwinning stress were observed in face-centered cubic deformation twins in Cu-8at.%Al alloy. The detwinning stress increased with temperature when the pi detwinning mode was involved, but decreased when the pi/3 mode was involved. The dual effect of temperature on the detwinning stress was due to the reduction of internal stresses pre-existing within the deformation twins. The complete reduction of internal stresses at about 530 degrees C led to the equivalence of the critical stresses of different detwinning modes and a decrease in the yield stress anisotropy of the twin/matrix structure.
Article
Materials Science, Multidisciplinary
Taowen Dong, Tingting Qin, Wei Zhang, Yaowen Zhang, Zhuoran Feng, Yuxiang Gao, Zhongyu Pan, Zixiang Xia, Yan Wang, Chunming Yang, Peng Wang, Weitao Zheng
Summary: The interaction between the electrode and the electric double layer (EDL) significantly influences the energy storage mechanism. By studying the popular alpha-Fe2O3 electrode and the EDL interaction, we find that the energy storage mechanism of the electrode can be controlled by modulating the EDL.
Article
Materials Science, Multidisciplinary
Matthew R. Barnett, Jun Wang, Sitarama R. Kada, Alban de Vaucorbeil, Andrew Stevenson, Marc Fivel, Peter A. Lynch
Summary: The elastic-plastic transition in magnesium alloy Mg-4.5Zn exhibits bursts of deformation, which are characterized by sudden changes in grain orientation. These bursts occur in a coordinated manner among nearby grains, with the highest burst rate observed at the onset of full plasticity. The most significant burst events are associated with twinning, supported by the observation of twinned structures using electron microscopy. The bursts are often preceded and followed by a stasis in peak movement, indicating a certain "birth size" for twins upon formation and subsequent growth at a later stage.
Article
Materials Science, Multidisciplinary
Vaidehi Menon, Sambit Das, Vikram Gavini, Liang Qi
Summary: Understanding solute segregation thermodynamics is crucial for investigating grain boundary properties. The spectral approach and thermodynamic integration methods can be used to predict solute segregation behavior at grain boundaries and compare with experimental observations, thus aiding in alloy design and performance control.
Article
Materials Science, Multidisciplinary
Feiyu Qin, Lei Hu, Yingcai Zhu, Yuki Sakai, Shogo Kawaguchi, Akihiko Machida, Tetsu Watanuki, Yue-Wen Fang, Jun Sun, Xiangdong Ding, Masaki Azuma
Summary: This study reports on the negative and zero thermal expansion properties of Cd2Re2O7 and Cd1.95Ni0.05Re2O7 materials, along with their ultra-low thermal conductivity. Through investigations of their structures and phonon calculations, the synergistic effect of local structure distortion and soft phonons is revealed as the key to achieving these distinctive properties.
Article
Materials Science, Multidisciplinary
Thomas Beerli, Christian C. Roth, Dirk Mohr
Summary: A novel testing system for miniature specimens is designed to characterize the plastic response of materials for which conventional full-size specimens cannot be extracted. The system has an automated operation process, which reduces the damage to specimens caused by manual handling and improves the stability of the test results. The experiments show that the miniature specimens extracted from stainless steel and aluminum have high reproducibility, and the results are consistent with those of conventional-sized specimens. A correction procedure is provided to consider the influence of surface roughness and heat-affected zone caused by wire EDM.
Article
Materials Science, Multidisciplinary
Rani Mary Joy, Paulius Pobedinskas, Nina Baule, Shengyuan Bai, Daen Jannis, Nicolas Gauquelin, Marie-Amandine Pinault-Thaury, Francois Jomard, Kamatchi Jothiramalingam Sankaran, Rozita Rouzbahani, Fernando Lloret, Derese Desta, Jan D'Haen, Johan Verbeeck, Michael Frank Becker, Ken Haenen
Summary: This study investigates the influence of film microstructure and composition on the Young's modulus and residual stress in nanocrystalline diamond thin films. The results provide insights into the mechanical properties and intrinsic stress sources of these films, and demonstrate the potential for producing high-quality nanocrystalline diamond films under certain conditions.