Grain Size and Texture Changes of Magnesium Alloy AZ31 during Multi-Directional Forging
Grain size and texture changes of magnesium alloy AZ31 was 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 showed excellent higher strength as well as moderate ductility at room temperature even at the grain size range below 1 μ m. Superplastic flow took place at 423 K and depended on the anisotropy of MDFed samples. The mechanisms of strain-induced fine-grained structure development and of the plastic deformation are discussed in detail.
magnesium alloy severe plastic deformation multidirectional forging workability strain-induced grain refinement texture continuous dynamic recrystallization
Xuyue Yang Jie Xing Hiromi Miura Taku Sakai
Department of Mechanical Engineering and Intelligent Systems, UEC Tokyo (The University of Electro-Communications), Chofu, Tokyo 182-8585, Japan
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）