异构金属材料的设计与制造

张显程, 张勇, 李晓, 王梓萌, 贺琛贇, 陆体文, 王晓坤, 贾云飞, 涂善东

Design and Manufacture of Heterostructured Metallic Materials

ZHANG Xiancheng, ZHANG Yong, LI Xiao, WANG Zimeng, HE Chenyun, LU Tiwen, WANG Xiaokun, JIA Yunfei, TU Shantung

图3 背应力计算方法与机理示意图[33,35]

Fig.3 Schematics of the calculation and mechanism of back stress (a) calculation of back stress (σb) in unloading-reloading loop[33] (σu—unload yield stress, σr—reload yield stress) (b) schematic of the mechanism of back stress and forward stress[35] (τa—an applied shear stress to pile up a dislocation against the boundary, n—the number of pile-up dislocations) (c) components of back stress (HDI—heterodeformation-induced) (d) back stress of gradient and homogeneous structures[33]