Deformation twins and twinning at ambient temperature in cryomilled Al-Zn-Mg-Cu alloy powders

来源期刊：中国有色金属学报(英文版)2007年第5期

论文作者：陈汉宾 程军胜 杨滨 张济山 田晓风 樊建中

文章页码：898 - 898

Key words：cryomilling; Al-Zn-Mg-Cu alloy; twins; mechanism

Abstract: The nanocrystalline Al-Zn-Mg-Cu alloy powders were synthesized using cryomilling. Deformation twins and twinning at ambient temperature were observed in Al-Zn-Mg-Cu powders. Experimental results indicate that high strain rate at low temperature during cryomilling induces the formation of deformation twins by the climbing of the restricted dislocations in nano-scale grains, and the cryomilled powders at high energies and nonequilibrium state reduce the grain boundary energies by twinning.

基金信息：the Hi-tech Research and Development Program of China