Effect of ECAP on Microstructure and Mechanical Properties of an Al-Mg-Sc Alloy

摘要：

An Al-4.57%Mg-0.2%Sc was subjected to equal channel angular pressing up to fixed true strains of ~1, ~2, ~4, ~8 and ~12 at a temperature of 300℃. It was shown that extensive grain refinement occurs in this alloy through continuous dynamic recrystallization. As a result, ECAP can provide the formation of subgrain structure, partially recrystallized structure and fully recrystallized structure. The type of structure evolved is dependent on strain imposed. At e<2, the formation of threedimensional arrays of low-angle boundaries takes place. Next, in the strain interval from 4 to 8 these low-angle boundaries gradually convert into high-angle boundaries. At ε~12, fully recrystallized structure is evolved. Yield stress and ultimate strength gradually increases with increasing strain. Mechanisms of strengthening are discussed.

作者: Anna Mogucheva Rustam Kaibyshev

作者单位: Belgorod State University,Pobedy 85,Belgorod 308015,Russia

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 949-954

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）