Article
Engineering, Mechanical
D. Depriester, J. P. Goulmy, L. Barrallier
Summary: With the increasing computational capability of modern computers, the Crystal Plasticity Finite Element Method (CPFEM) is gaining popularity in materials science for modeling the mechanical behavior of polycrystals. However, estimating the parameters of the CP constitutive laws remains challenging due to their indirect relation to the macroscopic behavior of polycrystalline aggregates. This paper proposes a two-step optimization scheme using a simple model and CPFEM simulations, along with experimental data, to determine these coefficients and assess CPFEM's ability to replicate in situ tensile tests.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Nanoscience & Nanotechnology
Xutao Huang, Yinping Chen, Jianjun Wang, Gang Lu, Wenxin Wang, Zan Yao, Sixin Zhao, Yujie Liu, Qian Li
Summary: This study aims to establish a novel approach to better understand and predict the behavior of materials with multi-scale lamellar microstructures. High-resolution reconstruction and collaborative characterization methods are used to accurately represent the microstructure. The mechanical properties of pearlite are investigated using crystal plasticity simulation and in-situ scanning electron microscopy tensile testing. The results validate the reliability of the novel strategy.
SCRIPTA MATERIALIA
(2024)
Article
Materials Science, Multidisciplinary
Mehrdad T. Kiani, Lucia T. Gan, Rachel Traylor, Rui Yang, Christopher M. Barr, Khalid Hattar, Jonathan A. Fan, X. Wendy Gu
Summary: Grain boundaries in metals and alloys have complex structural features that affect their mechanical behavior. This study used bicrystal Au thin films to investigate deformation at a single grain boundary and found that the misorientation angle of the grain boundary has minimal influence.
Article
Materials Science, Multidisciplinary
Mao Li, Xiaobao Tian, Wentao Jiang, Qingyuan Wang, Haidong Fan
Summary: Discrete dislocation dynamics simulations were used to study the mechanical behavior and dislocation evolution of Mg single-crystals compressed along c-axis. The results showed that basal-transition is an important mechanism for the strong strain hardening observed during c-axis compression. The basal-transition behavior also explained the formation of dislocation loops and steps observed in experiments.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Mathematics, Applied
Paolo Maria Mariano, Domenico Mucci
Summary: This study explains material slips at a microscopic scale using deformation mappings as SBV functions. It examines the existence of energy minimizers and avoids self-penetration of matter through a decomposition of elastic and plastic factors. The study also presents a representation of the slip system in terms of currents with different multiplicity choices.
ARCHIVE FOR RATIONAL MECHANICS AND ANALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Javier Varillas, Jan Ocenasek, Jordi Torner, Jorge Alcala
Summary: Nanoindentation experiments in various metals show the onset of plastic instabilities, formation of permanent nanoimprints and defect networks. Molecular dynamics simulations reveal the processes governing contact resistance, abrupt plastic instabilities, and the evolution towards a steady-state with plateauing hardness. The ratio of hardness to Young's modulus varies between different metals, with BCC Ta and Fe showing higher values. Factors such as stacking faults, nanotwin interlocking, and defect remobilization events contribute to the formation of permanent nanoimprints. Additionally, the correlation between nanoimprint formation and material response to indentation influences the hardness to yield strength ratio, exceeding the continuum plasticity bound.
Article
Materials Science, Multidisciplinary
J. P. Goulmy, D. Depriester, F. Guittonneau, L. Barrallier, S. Jegou
Summary: Understanding the mechanisms at the microstructure scale is crucial for modeling material behavior. This study explores the use of high resolution digital image correlation (HRDIC) combined with in situ Scanning Electron Microscope (SEM) tests to establish a connection between polycrystalline modeling and experiment. The tensile behavior of a pure copper polycrystal is evaluated using HRDIC, and the impact of grain orientation on mechanical behavior is discussed through EBSD analysis.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Ronghai Wu, Michael Zaiser
Summary: This paper discusses the thermodynamic consistency of physically based crystal plasticity constitutive equations and proposes constraints to restore thermodynamic consistency.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Multidisciplinary Sciences
Leora E. Dresselhaus-Marais, Grethe Winther, Marylesa Howard, Arnulfo Gonzalez, Sean R. Breckling, Can Yildirim, Philip K. Cooks, Mustafacan Kutsal, Hugh Simon, Carsten Detlefs, Jon H. Eggert, Henning Friis Poulsen
Summary: This study utilized time-resolved dark-field x-ray microscopy to directly observe the movement and interactions of dislocations in bulk aluminum. Real-time movies revealed the thermally activated motion and interactions of dislocations, as well as the structural instability near the melting temperature.
Article
Materials Science, Multidisciplinary
Yan Li, Xufei Fang, Eita Tochigi, Yu Oshima, Sena Hoshino, Takazumi Tanaka, Hiroto Oguri, Shigenobu Ogata, Yuichi Ikuhara, Katsuyuki Matsunaga, Atsutomo Nakamura
Summary: This study investigates the effects of light illumination on dislocation-mediated plasticity in hexagonal wurtzite ZnO. It is found that light illumination suppresses dislocation behavior, leading to differences in activation volume and dislocation glide under different light conditions.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Aravindh Nammalvar Raja Rajan, Marcel Krochmal, Thomas Wegener, Abhishek Biswas, Alexander Hartmaier, Thomas Niendorf, Ghazal Moeini
Summary: The correlation between microstructural features and mechanical behavior of PBF-LB/M AlSi10Mg is investigated in this study. Heat treatment significantly affects the sub-grain morphology of the Si-rich phase and has a considerable impact on the mechanical behavior of the components. Predictive modeling using constitutive and plasticity models accurately predicts the tensile properties of AlSi10Mg.
Article
Engineering, Mechanical
Chaitali S. Patil, Supriyo Chakraborty, Stephen R. Niezgoda
Summary: This study compared the effects of the Voce hardening law and dislocation density based hardening law on crystal plasticity simulations of tensile deformation. The results showed that the choice of hardening law influences stress distribution, with average texture characteristics predicted similarly by both laws. However, micro-texture varied with increasing strain.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Krishna Chaitanya Katakam, Natraj Yedla
Summary: This paper reports on the tensile and creep behavior of nickel nanowires containing volume defects, revealing that an increase in voids decreases the load-bearing capacity and elastic modulus of the NWs. Additionally, at high temperatures, free surface edges can act as sources of dislocations.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Wang Jiapo, Liang Jianwei, Wen Zhixun, Yue Zhufeng, Peng Yan
Summary: The study established atomic models for typical microstructures in nickel-based single crystals and conducted nanoindentation MD simulations. It found that plastic deformation is divided into P-i and P-u stages, with the behavior influenced by dislocation nucleation and emission.
MECHANICS OF MATERIALS
(2022)
Article
Engineering, Mechanical
Masato Wakeda, Ya-Ling Chang, Seiichiro Ii, Takahito Ohmura
Summary: The study evaluated the dislocation-grain boundary interactions in polycrystalline metals using experimental and computational nanoindentation analyses. The results from experiments and simulations provided insights into the plastic zone formation, dislocation nucleation, and transmission behavior at different GB interfaces. The findings highlighted the importance of GB structure and stress in influencing the strengthening mechanism of metals.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Ghiath Monnet
Article
Engineering, Mechanical
P. Franciosi, L. T. Le, G. Monnet, C. Kahloun, M. -H. Chavanne
INTERNATIONAL JOURNAL OF PLASTICITY
(2015)
Article
Materials Science, Multidisciplinary
Jean-Baptiste Baudouin, Akiyoshi Nomoto, Michel Perez, Ghiath Monnet, Christophe Domain
JOURNAL OF NUCLEAR MATERIALS
(2015)
Article
Nanoscience & Nanotechnology
Ghiath Monnet
SCRIPTA MATERIALIA
(2015)
Review
Materials Science, Multidisciplinary
Ghiath Monnet
JOURNAL OF NUCLEAR MATERIALS
(2018)
Article
Engineering, Mechanical
H. A. Khater, G. Monnet, D. Terentyev, A. Serra
INTERNATIONAL JOURNAL OF PLASTICITY
(2014)
Article
Engineering, Mechanical
Maoyuan Jiang, Benoit Devincre, Ghiath Monnet
INTERNATIONAL JOURNAL OF PLASTICITY
(2019)
Article
Materials Science, Multidisciplinary
Jean-Baptiste Baudouin, Ghiath Monnet, Michel Perez, Christophe Domain, Akiyoshi Nomoto
Article
Materials Science, Multidisciplinary
Ghiath Monnet, Manuel A. Pouchon
Article
Nanoscience & Nanotechnology
D. Terentyev, G. Monnet, P. Grigorev
SCRIPTA MATERIALIA
(2013)
Article
Materials Science, Multidisciplinary
Ghiath Monnet, Ludovic Vincent, Lionel Gelebart
JOURNAL OF NUCLEAR MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
R. Badyka, G. Monnet, S. Saillet, C. Domain, C. Pareige
JOURNAL OF NUCLEAR MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
M. Pascuet, G. Monnet, G. Bonny, E. Martinez, J. J. H. Lim, M. G. Burke, L. Malerba
JOURNAL OF NUCLEAR MATERIALS
(2019)
Proceedings Paper
Nuclear Science & Technology
Ghiath Monnet
MINOS 2ND INTERNATIONAL WORKSHOP, IRRADIATION OF NUCLEAR MATERIALS: FLUX AND DOSE EFFECTS
(2016)