繰返し負荷を受けるTi合金の不均一変形に関する結晶塑性解析

抄録

To understand mechanisms of non-uniform deformation of α-Ti under cyclic loading, crystal plasticity analysis was conducted employing a tricrystal model, and the relationship between the work hardening and activities of slip systems was investigated. The crystal orientations were arranged so as that the prismatic <a> or basal slip system was the primary one in each crystal grain. The results showed that the activity of basal slip system increased with decreasing that of non-basal one on the condition that the work hardening occurred on the prismatic <a> slip system. The phenomenon indicates that there is a mechanism where the basal slip system can operate under cyclic loading even though the non-basal slip is firstly activated.