Results 11 to 20 of about 203,967 (191)
Crystals, 2017 Non-uniform grain boundary sliding can induce strain and rotation incompatibilities at perfectly planar interfaces. Explicit analytic expressions of stress and lattice rotation jumps are thus derived at a planar interface in the general framework of ...
Thiebaud Richeton
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Motion of grain boundaries incorporating dislocation structure [PDF]
Journal of the Mechanics and Physics of Solids, 2018, 2017 In this paper, we present a continuum model for the dynamics of low angle grain boundaries in two dimensions based on the motion of constituent dislocations of the grain boundaries. The continuum model consists of an equation for the motion of grain boundaries (i.e., motion of the constituent dislocations in the grain boundary normal direction) and ...
arxiv +1 more source
Journal of Materials Research and Technology, 2022 In order to probe the superior nano/micron scale mechanical behaviors of ultra-fine grain (UFG) austenitic stainless steel as compared with coarse grain (CG) counterpart, systematic nanoindentation tests were carried out together with post-mortem EBSD ...
Rui Ke +4 more
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Dual phase patterning during a congruent grain boundary phase transition in elemental copper [PDF]
Nat. Commun. 13, 3331 (2022), 2021 The phase behavior of grain boundaries can have a strong influence on interfacial properties. Little is known about the emergence of grain boundary phases in elemental metal systems and how they transform. Here, we observe the nanoscale patterning of a grain boundary by two alternating grain boundary phases with distinct atomic structures in elemental ...
arxiv +1 more source
Grain boundaries in ultrafine grained materials processed by severe plastic deformation and related phenomena [PDF]
Materials Science and Engineering: A 540 (2012) 1, 2012 Grain boundaries in ultrafine grained (UFG) materials processed by severe plastic deformation (SPD) are often called "non-equilibrium" grain boundaries. Such boundaries are characterized by excess grain boundary energy, presence of long range elastic stresses and enhanced free volumes. These features and related phenomena (diffusion, segregation, etc.)
arxiv +1 more source
Grain-boundary topological superconductor
Communications Physics, 2023 Majorana zero modes (MZMs) are of central importance for modern condensed matter physics and quantum information due to their non-Abelian nature, which thereby offers the possibility of realizing topological quantum bits.
Morten Amundsen, Vladimir Juričić
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Grain boundary effects on electronic transport in metals [PDF]
Phys. Stat. Solidi B, 247, 1791 - 1796 (2010), 2009 We present quantum-based simulations of single grain boundary reflectivity of electrons in metals, Cu and Ag. We examine twin and non-twin grain boundaries using non-equilibrium Green's function and first principles methods. We also investigate the mechanism of reflectivity in grain boundaries by modeling atomic vacancies, disorder, and orientation and
arxiv +1 more source
Materials & Design, 2022 Grain boundary structures with high resistance to intergranular fracture are the target of grain boundary design. In this work, grain boundary elimination in front of crack tip is observed in two special bcc iron bicrystals through molecular dynamics ...
Zhifu Zhao +4 more
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Statistics of grain microstructure evolution under anisotropic grain boundary energies and mobilities using threshold-dynamics [PDF]
arXiv, 2023 This paper investigates the statistical behavior of two-dimensional grain microstructures during grain growth under anisotropic grain boundary characters. We employ the threshold-dynamics method, which allows for unparalleled computational speed, to simulate the full-field curvature motion of grain boundaries in a large polycrystal ensemble.
arxiv
The mechanisms of grain growth of Mg alloys: A review
Journal of Magnesium and Alloys, 2022 Grain growth directly influences the plasticity and strength of Mg alloys. As the grain size decreases from the microscale to the nanoscale, the plasticity of Mg alloys continually increases, whereas the strength first increases and later decreases ...
Qinghua Chen +8 more
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