純アルミ双結晶に生じる多重すべり解析 : 潜在硬化挙動に対する力学モデルの検討

概要

論文の詳細を見る
A model of latent hardening due to dislocation interaction is proposed, which can express strain hardening properties of fcc single crystal in various tensile directions. Tensile properties of an aluminum bicrystal composed of crystals initially oriented for single slip and <100> tensile direction are analyzed on the basis of crystal plasticity theory incorporated with the proposed hardening model. In numerical results, several slip systems are activated near the grain boundary of <100> grain due to the local stress which arises from plastic incompatibility. Flow stress of the bicrystal is larger than the average of component single crystals due to such additional slips, but this difference is smaller than the experimental observation. As deformation proceeds, slip state of <100> grain changes from 8 symmetric slips to a smaller number of slips. This tendency is stronger for the latent hardening model than for the isotropic model.
一般社団法人日本機械学会の論文
1996-12-25