Project (50804018) supported by the National Natural Science Foundation of China;Project (ZDS2010015C) supported by Key Lab of Advanced Materials in Rare and Precious and Non-ferrous Metals, Ministry of Education, KMUST, China;Project (2010DH025) supported by Yunnan Province Construction Plans of Scientific and Technological Conditions, China
The initial copper with large grain sizes of 60-100 μm was processed by six passes asymmetrical accumulative rolling-bond (AARB) and annealing, the ultra-fine-grained (UFG) copper with grain size of 200 nm was ob...