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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 2    April 2003

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Flow stress and softening behavior of wrought magnesium alloy AZ31B at elevated temperature
WANG Ling-yun(汪凌云), FAN Yong-ge(范永革),
HUANG Guang-jie(黄光杰), HUANG Guang-sheng(黄光胜)

College of Materials Science & Engineering, 
Chongqing University, Chongqing 400044, China

Abstract:The flow stress and softening behavior of AZ31B magnesium alloy in hot compression were investigated. The relationship of flow stress, temperature and strain rate was appropriately described with the exponential form of Zener-Hollemen parameter during steady state deformation of alloy at 573-723K, 0.01-5s-1. Dynamic recrystallization is the softening mechanism of AZ31B in hot compression. The flow curves of alloy have almost no peak value at 723K and lower strain rate, presenting feature of geometric dynamic recrystallization.

 

Key words:  magnesium alloy; compression; flow stress; dynamic recrystallization

ISSN 1672-7029
CN 43-1423/U

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