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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Hot compression deformation behavior of MB26 magnesium alloy
DU Zhi-hui(杜志惠)1, ZHANG Xu-hu(张绪虎)1, FANG Xi-ya(方西亚)2,
ZHANG Xiao-juan(张晓娟)2, CHEN Yong-lai(陈永来)1, ZHANG Yu-wei(张宇玮)

1. Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China;
2. Central South University, Changsha 410083, China

Abstract:The flow stress features of MB26 magnesium alloy were studied by isothermal compression at 300−450 ℃ and strain rate of 0.001−1 s1 with Gleeble 1500 thermal simulator. In addition, the deformation activation energy Q was calculated. The results show that the strain rate and deformation temperature have obvious effect on the true stress. The peak value of flow stress becomes larger with increasing strain rate at the same temperature, and gets smaller with the increasing deformation temperature at the same strain rate. The alloy shows partial dynamic recrystallization. The flow stress of MB26 magnesium alloy during high temperature deformation can be represented by Zener-Hollomon parameter including the Arrhemius term. The temperature range of 350−400 ℃ is suggested for hot-forming of this alloy.

 

Key words: MB26 magnesium alloy; hot compression deformation; flow stress

ISSN 1672-7029
CN 43-1423/U

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