问题:第一张照片:1) Please point out in Fig 4(b) where are dislocations? How to confirm the contrast shown in Fig 4(b) is not due to serious contamination during TEM foil preparation? 这个问题俺真的不知道如何区别位错还是污染物!请各位帮助 第二张照片:2) Please explain in Fig 4(f), are the contrast highlighted by arrow in 4(f) caused by dislocation or beta grain boundary? 这个我认为是再结晶晶粒已经在原先的形变组织中形成,黑白衬度不同,是因为形成了位向各不相的 beta grain 。