Influence of Initial Microstructure on the Hot Working Flow Stress of Mg-3Al-1Zn Alloy

Abstract:

The hot working flow stress of as-cast and two different extruded magnesium alloys AZ31was examined by uniaxial compression tests. It was found that the hot deformation behavior was affected by the deformation conditions and initial microstructure. The peak flow stress was sensitive to deformation temperature and strain rate, and the value was decreased with decreasing the deformation rate or increasing the deformation temperature. The extruded samples, instead of as-cast samples, have better ductility at high strain rate and high temperature. The temperature increment for Mg alloy with different extrusion ratios was also investigated. These key features of the deformation behavior were explained in terms of twinning, dynamic recrystallization and grain rotation.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 86-90
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.86
• Online since: June 2017
• Authors: Yun Teng Liu, Ji Xue Zhou*, Di Zhang, Tao Lin, Yu Liu, Chang Wen Tian, Yuan Sheng Yang
• Keywords: Deformation Behavior, High Temperature, Initial Microstructure, Magnesium Alloys, Uniaxial Compression

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