High temperature compressive deformation behaviors of extruded AZ91 magnesium alloy

来源期刊：中国有色金属学报(英文版)2005年第z2期

论文作者：甘为民 吴昆 李淑波 郑明毅

文章页码：288 - 292

Key words：compression； magnesium alloy； deformation mechanism

Abstract: The compressive deformation behaviors of the extruded AZ91 at temperatures around the solidus were investigated. The compressive stress—strain curves were measured, and the hot deformation microstructures were observed. Dynamic recovery (DRV) and dynamic recrystallization (DRX) take place during compression. The main deformation mechanism is climbing of dislocations controlled by the lattice diffusion. The presence of the liquid relaxes the stress concentration which facilitates the deformation. Higher activation energy is attributed to the non-basal sliding in addition to the presence of liquid phases.