Grain size and texture changes of magnesium alloy AZ31 during multi-directional forging

来源期刊：中国有色金属学报(英文版)2008年增刊第1期

论文作者：杨续跃 孙争艳 XING Jie MIURA Hiromi SAKAI Taku

文章页码：200 - 204

Key words：magnesium alloy; severe plastic deformation; multidirectional forging; texture; continuous dynamic recrystallization

Abstract: Grain size and texture changes of magnesium alloy AZ31 were studied in multidirectional forging(MDF) under decreasing temperature conditions. MDF was carried out up to large cumulative strains of 4.8 with changing the loading direction during decrease in temperature from pass to pass. MDF can accelerate the uniform development of fine-grained structures and increase the plastic workability at low temperatures. As a result, the MDFed alloy shows excellent higher strength as well as moderate ductility at room temperature even at the grain size below 1μm. Superplastic flow takes place at 423 K and depends on the anisotropy of MDFed samples. The mechanisms of strain-induced fine-grained structure development and of the plastic deformation were discussed in detail.