Superplasticity in magnesium-based composite
来源期刊：中国有色金属学报(英文版)2003年第z1期
论文作者：ZHAO Min（赵 敏） WU Kun（吴 昆） YAN Feng（严 峰） YANG De-zhuang（杨德庄）
文章页码：195 - 197
Key words：SiC whiskers; magnesium matrix composite; superplasticity; activation energy; texture
Abstract: Superplasticity in a SiCw/ZK60 composite was studied. The samples were tested at temperatures ranging from 573K to 723K and at the initial strain rates ranging from 8.3×10-4s-1 to 8.3×10-2s-1. A maximum elongation of 200% was obtained at 613K and 1.67×10-2s-1 with a m-value of 0.35. The activation energy (98kJ/mol) approximates that for grain boundary diffusion (92kJ/mol) in magnesium. A strong 〈111〉 fibre texture was developed in SiC whiskers during superplastic deformation.
ZHAO Min（赵 敏）, WU Kun（吴 昆）, YAN Feng（严 峰）, YANG De-zhuang（杨德庄）
(School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China)
Abstract:Superplasticity in a SiCw/ZK60 composite was studied. The samples were tested at temperatures ranging from 573K to 723K and at the initial strain rates ranging from 8.3×10-4s-1 to 8.3×10-2s-1. A maximum elongation of 200% was obtained at 613K and 1.67×10-2s-1 with a m-value of 0.35. The activation energy (98kJ/mol) approximates that for grain boundary diffusion (92kJ/mol) in magnesium. A strong 〈111〉 fibre texture was developed in SiC whiskers during superplastic deformation.
Key words:SiC whiskers; magnesium matrix composite; superplasticity; activation energy; texture
