文献类型：期刊文章

作　　者：李东锋[1,2,3] 张端正[1,2] 刘胜胆[1,2,4] 单朝军[1,2] 张新明[1,2,4] 王琴[1,2] 韩素琦[1,2]

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]中南大学有色金属材料科学与工程教育部重点实验室,长沙410083 [3]湖南工程学院机械工程学院,湘潭411104 [4]中南大学有色金属先进结构材料与制造协同创新中心,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Project(2012CB619500)supported by the National Basic Research Program of China

年　　份：2016

卷　　号：26

期　　号：6

起止页码：1491-1497

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2015_2016、EBSCO、EI、IC、INSPEC、JST、SCI(收录号：WOS:000379548800004)、SCI-EXPANDED(收录号：WOS:000379548800004)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：The dynamic recrystallization behavior of 7085 aluminum alloy during hot compression at various temperatures （573？723 K） and strain rates （0.01-10 s^-1） was studied by electron back scattered diffraction （EBSD）, electro-probe microanalyzer （EPMA） and transmission electron microscopy （TEM）. It is shown that dynamic recovery is the dominant softening mechanism at high Zener？Hollomon （Z） values, and dynamic recrystallization tends to appear at low Z values. Hot compression with ln Z=24.01 （723 K, 0.01 s？1） gives rise to the highest fraction of recrystallization of 10.2%. EBSD results show that the recrystallized grains are present near the original grain boundaries and exhibit similar orientation to the deformed grain. Strain-induced boundary migration is likely the mechanism for dynamic recrystallization. The low density of Al3Zr dispersoids near grain boundaries can make contribution to strain-induced boundary migration.

关 键 词：aluminum alloy  Zener-Hollomon parameter  dynamic recrystallization  strain-induced boundary migration  Al3Zr dispersoids  

分 类 号：TG146.21[材料类]