強い塑性異方性を持つ金属材料におけるバウシンガー効果の発現機構

抄録

Bauschinger effect is closely related to plastic anisotropy as pointed out in the past studies. In the present study, underlying mechanisms of Bauschinger effect in magnesium (Mg) alloys, where basal slip system is predominantly activated, were studied by experimental and numerical approaches. Experimentally, uniaxial loading tests with stress reversal were performed on the alloys with different plastic anisotropy. The plastic anisotropy of the alloy was controlled by changing the volume fraction of LPSO phase which shows more significant plastic anisotropy compared with α-Mg matrix. Numerically, the influences of inter-granular and intra-granular heterogeneities on Bauschinger effect were evaluated by a crystal plasticity finite element analysis.