4 上清充通大￥ Recovery SHEAMGRAI DUD TONO UHTVEREETTY Subgrain coarsening 2.0 30 diameter 25 1.5 10. mlsorlentation 5 ★ 0.5 600 10001500 2000 25003000 Time Computer simulation of subgrain (a) (b) growth and misorientation decrease in the absence of a The boundary movements which may lead to a misorientation gradient decrease in the average misorientation if there is no orientation gradient Institute of Forming Technology Equipment 20Recovery Institute of Forming Technology & Equipment 20 Subgrain coarsening Computer simulation of subgrain growth and misorientation decrease in the absence of a misorientation gradient The boundary movements which may lead to a decrease in the average misorientation if there is no orientation gradient