异质纳米结构金属强化韧化机理研究进展

卢磊, 赵怀智

Progress in Strengthening and Toughening Mechanisms of Heterogeneous Nanostructured Metals

LU Lei, ZHAO Huaizhi

图3 层状异质结构材料在不同裂纹取向下的韧化机制,Al-7075/Al-1050异质层状结构金属的EBSD微观结构[54]及其在Crack arrester方向冲击断裂的SEM断面形貌[54]

Fig.3 Toughening mechanisms recorded in laminated materials with different cracking orientations relative to the heterointerfaces (a-e), EBSD and SEM images of the Al-7075/Al-1050 laminate (f-h) (a-c) crack arrester orientation with both crack plane and crack growth direction perpendicular to the interfaces, where the crack deflection, delamination, or crack bridging may be activated (d, e) crack divider orientation with the crack plane perpendicular to the interfaces while the crack growth direction parallel to the interfaces, where the delamination may be developed (f, g) EBSD maps show the microstructure of the Al-7075/Al-1050 laminate[54] (h) SEM image of a Charpy fractured sample of the Al-7075/Al-1050 laminate tested in crack arrester orientation[54]