Shear deformation and grain refinement in pure Al by asymmetric rolling

来源期刊:中国有色金属学报(英文版)2008年第4期

论文作者:左方青 蒋建华 单爱党 方建敏 张杏耀

文章页码:774 - 774

Key words:asymmetric rolling; shear deformation; pure aluminum; equivalent strain

Abstract: Asymmetric rolling(ASR), as one of severe plastic deformation(SPD) methods, was widely used to make ultra-fined materials with enhanced performance. Internal marks were used to show the shear deformation during asymmetric rolling with pure aluminium as a model material. Effects of reduction ratio and mismatch ratio on the shear deformation were studied. With the observed shear deformation results, equivalent strain was calculated. For lager shear deformation, rolling equipment was modified to increase friction between specimen and the rollers. Consequently, extremely fine grains with size of 500 nm are obtained in pure aluminium. With improved asymmetric rolling, the ability of grain refinement of ASR is greatly improved.

基金信息:the National Natural Science Foundation of China
New Century Scholarship of the Ministry of Education of China

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