Microstructure transformation of deformed AZ91D during isothermal holding

来源期刊：中国有色金属学报(英文版)2010年第1期

论文作者：张友法 刘勇兵 曹占义 张亮

文章页码：14 - 21

Key words：AZ91D magnesium alloy; deformation; isothermal holding; microstructure transformation

Abstract: In order to understand the thermodynamic properties of deformed AZ91D alloy during isothermal holding, the microstructure characteristics and transformation were investigated. The results present that deformation mainly concentrates on the edge of the chips and billets, especially at the interface of α/β. Microstructure transformation mechanism of deformed AZ91D during holding mainly includes recrystallization, spheroidization and Ostwald ripening. The mechanism was then thermodynamically analyzed. During the heating and isothermal holding process, recrystallization driven by residual energy within the deformed AZ91D alloy, spheroidization and Ostwald ripening induced by the reduction of interfacial energy, will inevitably and continuously occur with the extension of heating and holding.

基金信息：the National Science and Technology Supporting Program of China