Results 31 to 40 of about 203,967 (191)
Impact of grain boundary energy anisotropy on grain growth [PDF]
Phys. Rev. Materials 8, 093403, 2024A threshold dynamics model of grain growth that accounts for the anisotropy in the grain boundary energy has been used to simulate experimentally observed grain growth of polycrystalline Ni. The simulation reproduces several aspects of the observed microstructural evolution that are not found in the results of simulations assuming isotropic properties.
arxiv +1 more source
Journal of Materials Research and Technology, 2023 A systematic study was conducted to analyze the grain boundary microstructure evolution of GH4169 nickel-based superalloy during the micro-strain stage of thermal deformation.
Min Ling, Yi-Long Liang
doaj
Phase Pattern Formation in Grain Boundaries [PDF]
arXiv, 2023 In this work we derive conditions that predict the existence of two-phase periodic-pattern grain boundary structures that are stable against coarsening. While previous research has established that elastic effects can lead to phase pattern formation on crystal surfaces, the possibility of stable grain boundary structures composed of alternating grain ...
arxiv
Grain boundary relaxation and reconstruction: effect on local magnetic moment [PDF]
Condens. Matter Phys., vol. 19, No. 4, 43603 (2016), 2016 We present a detailed numerical study on structure and local magnetic properties of $\langle 100 \rangle$ symmetric tilt grain boundaries in bcc-iron. Particular attention is paid to connection between type of grain boundary relaxation and local magnetic properties.
arxiv +1 more source
Stabilization and self-passivation of symmetrical grain boundaries by mirror symmetry breaking [PDF]
, 2018 While computational methods for the study of point defects in materials have received significant attention, methods for the investigation of grain boundaries require further development. In this study, we applied a genetic algorithm to find the atomic structure of grain boundaries in semiconductor materials with given Miller indices and investigated ...
arxiv +1 more source
New phase-field model for polycrystalline systems with anisotropic grain boundary properties
Materials & Design, 2022 In this paper, a new methodology is presented to inlude anisotropic grain boundary properties in a phase-field model. The new approach is thermodynamically consistent and gives accurate control of the inclination and misorientation of grain boundary ...
Nele Moelans
doaj
Entropy-Driven Grain Boundary Segregation: Prediction of the Phenomenon
Metals, 2021 The question is formulated as to whether entropy-driven grain boundary segregation can exist. Such a phenomenon would be based on the assumption that a solute can segregate at the grain boundary sites that exhibit positive segregation energy (enthalpy ...
Pavel Lejček, Siegfried Hofmann
doaj +1 more source
Grain boundary energies and cohesive strength as a function of geometry [PDF]
, 2007 Cohesive laws are stress-strain curves used in finite element calculations to describe the debonding of interfaces such as grain boundaries. It would be convenient to describe grain boundary cohesive laws as a function of the parameters needed to describe the grain boundary geometry; two parameters in 2D and 5 parameters in 3D.
arxiv +1 more source
Charge and spin transport on graphene grain boundaries in a quantizing magnetic field [PDF]
Phys. Rev. B 96, 041403 (2017), 2017 We study charge and spin transport along grain boundaries in single layer graphene in the presence of a quantizing magnetic field. Transport states in a grain boundary are produced by hybridization of Landau zero modes with interfacial states. In selected energy regimes quantum Hall edge states can be deflected either fully or partially into grain ...
arxiv +1 more source
AIP Advances, 2018 We investigated the effects of grain boundary phases on magnetization reversal in permanent magnets by performing large-scale micromagnetic simulations based on Landau–Lifshitz–Gilbert equation under a periodic boundary.
Hiroshi Tsukahara +4 more
doaj +1 more source