纳米金属结构材料的韧化

赵永好, 毛庆忠

Toughening of Nanostructured Metals

ZHAO Yonghao, MAO Qingzhong

图8 等径角挤压(ECAP)和随后液氮拉拔、轧制(ECAP + D + R)超细晶Cu的拉伸曲线,液氮变形引入的纳米形变孪晶,及孪晶界和位错的反应[82]

Fig.8 Tensile curves of equal channel angular pressing (ECAP) and subsequent liquid nitrogen drawing and rolling (ECAP + D + R) of ultrafine grained (UFG) copper (a), nano deformation twins introduced by liquid nitrogen deformation (b), and interaction of twin boundaries and dislocations (c)[82] (Inset in Fig.8a shows dimension of tensile sample with a thickness of 0.1 mm, b—Burgers vector)