Numerical analysis of interaction between solute atom and extended dislocation using force multipoles
来源期刊：中南大学学报(英文版)2014年第8期
论文作者：Hiroaki Morita Akiyuki Takahashi
文章页码：3000 - 3006
Key words：solution hardening; force multipole; solute atom; extended dislocation; Peierls-Nabarro model
Abstract: The interaction between a solute atom and an extended dislocation was investigated using a continuum approximation method with force multipoles. The dislocation core structure of extended dislocation was modeled with the Peierls-Nabarro model discretized with a number of infinitesimal Volterra dislocations. The interaction energy and force between a nickel solute atom and perfect and extended dislocation in copper were successfully calculated using the force multipoles. The results clearly show that the core structure of extended dislocation weakens the interaction with solute atoms. The interaction energy and force for extended dislocations are almost the half of those for perfect dislocations.
Hiroaki Morita, Akiyuki Takahashi
(Department of Mechanical Engineering, Faculty of Science and Technology,
Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba, Japan)
Abstract:The interaction between a solute atom and an extended dislocation was investigated using a continuum approximation method with force multipoles. The dislocation core structure of extended dislocation was modeled with the Peierls-Nabarro model discretized with a number of infinitesimal Volterra dislocations. The interaction energy and force between a nickel solute atom and perfect and extended dislocation in copper were successfully calculated using the force multipoles. The results clearly show that the core structure of extended dislocation weakens the interaction with solute atoms. The interaction energy and force for extended dislocations are almost the half of those for perfect dislocations.
Key words:solution hardening; force multipole; solute atom; extended dislocation; Peierls-Nabarro model
