New understanding of deformation and recrystallization based on single-crystal stress measurement

利用<111>同步辐射测量了铝单晶在生长态、8%拉伸变形和变形后退火阶段的应力应变分布。一个典型的生长单晶是由三个亚晶粒由亚边界。在8%的拉伸变形后，亚晶组织仍然存在。残余应力约为5 MPa，在各亚晶中呈随机分布。753 K退火后形成的再结晶晶粒的晶体质量远好于生长态晶体。通过使用同步辐射，可以以非常高的分辨率和精度测量应力/应变。

The distribution of stress/strain in <111> aluminum single crystals was measured at as-grown, 8% tensile deformation, and post-deformation annealing stages, by using synchrotron radiation. A typical as-grown single crystal was composed of three sub-grains bounded by sub-boundaries. After 8% tensile deformation, the sub-grained structure remained. The residual stress approximately of 5MPa was randomly distributed in each sub-grain. The crystal quality of recrystallized grains formed after 753K annealing was better by far than that of the as-grown crystal. By using the synchrotron radiation, it was possible to measure the stress/strain with very high resolution and accuracy.