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对柱状晶纯镍样品先拉伸后冷轧,用透射电镜和扫描电镜表征其位错结构。在拉伸变形时形成的结构在后续的轧制变形后保持或改变取决于当应变路径改变时开动的滑移系是否发生了改变。当开动的滑移系发生变化时,最终的结构由第二应变路径中开动的滑移系所决定。这些结果为支持已发表的滑移系活动与位错结构的关系提供了进一步的证明。
The columnar pure nickel samples were first stretched and then cold rolled, and their dislocation structures were characterized by transmission electron microscopy and scanning electron microscopy. The structure formed upon tensile deformation is retained or changed after the subsequent rolling deformation depending on whether the slip system actuated when the strain path is changed has changed. When the starting slip system changes, the final structure is determined by the slip system activated in the second strain path. These results provide further evidence to support the published relationship between slip system activity and dislocation structure.