クロス圧延加工後のα′ マルテンサイト
Ti-V系合金の結晶配向と機械的特性

抄録

The effects of cross rolling on the microstructure, crystallographic orientation and mechanical properties of α′ martensite (Ti-8mass%V)-4mass%Sn and (Ti-12mass%V)-2mass%Al alloys were examined. After cold rolling, the microstructure of acicular martensite evolved into a refined cell dislocation structure. On crystallographic orientation after cold rolling, the directional cold-rolled plate showed the preferred orientation with the basal plane inclined in the transverse direction (TD). In contrast, the cross cold-rolled plate at reductions of 30-31% for the first rolling direction (RD1) followed by cross rolling (RD2) at reductions greater than 40% showed a rolling texture, having the basal pole scattered within 30° around the normal direction (ND), by increasing cross rolling reduction. Accompanying such texture formation by cross rolling, the anisotropy of Young′s modulus in the rolling plane decreased with increasing cross rolling reduction.