純マグネシウム単結晶および多結晶材の曲げ変形挙動

抄録

Bending deformation behavior of polycrystalline pure magnesium with crystallographic texture was investigated and compared with that of magnesium single crystals. Rolled sheets with {0001}<1120> texture were prepared and cut into four types of bending specimens. Bending deformation behavior depends on the direction of sheets, i.e., texture. However, yield stresses were independent of texture and nearly the same. With basal planes were perpendicular to the neutral plane, specimens deformed due to twinning and showed V-shape. On the other hand, with basal planes the neutral plane, specimens deformed due to basal slips and showed gull-shape. Distribution of {1012} twins on the side surface suggested that the neutral plane moves during bending deformation. Bending deformation behavior of magnesium polycrystals are in good agreement with that of its single crystals.