Grain Refinement in AZ61 Mg Alloy during Hot Cyclic Bending

摘要：

Strain-induced grain refinement in magnesium alloy AZ61 was studied by means of cyclic bending carried out at a temperature 623K. The deformed microstructures were investigated by optical and SEM/EBSD metallographic observation. The results show that the grain size of the surface layer can be significant refined to about 3 urn by dynamic recrystallization. The volume fraction of new grains increases with strain and reaches a value of 0.8 after 8 passes. Most of the new grains are separated by high angle boundaries. Hardness distribution through thickness for the cyclic bended sheet exhibits V shape with the marked difference between the surface and the inside, the hardness is critically increased in surface layer, i.e. ~82 Hv, which is about 1.39 times than the as-received AZ61.

作者: Yupei Jiang Xuyue Yang Lei Zhang

作者单位: School of Materials science and Engineering,Central South University,Changsha 410083,China School of Materials science and Engineering,Central South University,Changsha 410083,China Key Labor

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: 623-627

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）