アルミニウム結晶中の熱活性による粒界すべり-粒界移動の分子動力学シミュレーション

概要

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We investigate the main-boundary behavior of coupled sliding and migration induced by thermal activation, using a molecular dynamics simulation. The two [001] (310) Σ=5 tilt grain boundaries are simulated in aluminum, where Morse potential and periodic boundary conditions are used. The simulations show that when the temperature is low, or when the distance between the two boundaries is long, the boundary structure is likely to be preserved, and the sliding and migration of one grain boundary tends to be accompanied by sliding and migration of the other grain boundary. When the temperature is high, or when the distance is short, these tendencies are weakened. Boundary sliding and migration is unlikely in crystals where the boundary structure is disordered, because dislocation generation and mobility are difficult in such crystals.
社団法人日本機械学会の論文
1993-11-25