Effect of scandium on superplasticity of Al-Mg alloys
来源期刊：中国有色金属学报(英文版)2001年第2期
论文作者：孝云祯 高彩茹 马宏声 田士平
文章页码：235 - 238
Key words：Al-6Mg-0.22Sc alloy; Al-Mg alloy; superplasticity
Abstract: The superplastic behavior of adding 0.22%Sc into the Al-6Mg alloy was studied by simple superplastic pretreatment process--warm rolling and cold rolling. The optimum superplastic temperature and strain rate of the alloys were defined and satisfactory results were obtained during the superplastic deformation at 811 K and initial strain rate ε0=1.67×10-3s-1. The average elongation of Al-6Mg-0.22Sc alloys reaches to 1 125%, and the maximum elongation is 1 200%, maximum m value (strain rate sensitive index) is 0.879. But under the same condition the elongation and maximum m value for Al-6Mg alloy were only 377% and 0.595, respectively. The superplastic deforming mechanism for Al-6Mg-0.22Sc alloys was also discussed.
