Akio Ishii
Osaka University
26 Papers
54 Citations
Akio Ishii is an academic researcher from Osaka University. The author has contributed to research in topics: Nucleation & Grain boundary. The author has an hindex of 12, co-authored 21 publications.
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Papers
Hydrogen embrittlement controlled by reaction of dislocation with grain boundary in alpha-iron
Liang Wan,Liang Wan,Wen-Tong Geng,Wen-Tong Geng,Akio Ishii,Jun-Ping Du,Jun-Ping Du,Q.S. Mei,Nobuyuki Ishikawa,Hajime Kimizuka,Shigenobu Ogata,Shigenobu Ogata +11 more
TL;DR: In this article, the reaction of grain boundaries with lattice dislocations is a key component in hydrogen embrittlement mechanism for polycrystalline metals, and the authors use atomistic modeling methods to investigate the mechanical response of GBs in alpha-iron with various hydrogen concentrations.
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Shuffling-controlled versus strain-controlled deformation twinning: The case for HCP Mg twin nucleation
TL;DR: In this paper, a shuffling-controlled deformation twinning of Mg is shown to be shuffling controlled at the smallest lengthscale of the irreducible lattice correspondence pattern, that is, the reaction coordinate at the level of 4 atoms is dominated by nonaffine displacements, instead of strain.
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Transition of creep mechanism in nanocrystalline metals
TL;DR: In this article, a molecular dynamics analysis of creep in nanocrystalline (NC) metals is presented, where the dominant creep mechanism transits from grain boundary (GB) diffusion to GB sliding, and then dislocation nucleation with increasing stress.
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Adaptive-boost molecular dynamics simulation of carbon diffusion in iron
TL;DR: In this article, an accelerated molecular dynamics (MD) method was developed to model atomic-scale rare events, where a smooth histogram of collective variables is estimated by canonical ensemble molecular dynamics calculations, and then a temperature-dependent boost potential is iteratively constructed to accelerate the MD simulation.
Temperature-dependent nucleation kinetics of Guinier-Preston zones in Al-Cu alloys: An atomistic kinetic Monte Carlo and classical nucleation theory approach
TL;DR: In this paper, an atomistic kinetic Monte Carlo (kMC) modeling technique for exploring the nucleation and formation processes of GP zones in Al-Cu alloys by constructing an effective on-lattice multibody potential for a dilute Al-cu-vacancy system by density functional theory calculations.
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