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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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Creep mechanism of Mg-Nd-Zn-Zr alloy at ambient temperature
ZHONG Ying-ying(仲莹莹)1, WU Yi-ping(吴懿萍)1, XU Shu-fang(许树芳)2,
GUO Tian-cai(郭天才)1, 2, ZHANG Xin-ming(张新明)1

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Defence Technology R&T Center, China Aerospace Science & Industry Corporation, Beijing 100854, China

Abstract:Magnesium alloy’s creep stress exponent and creep mechanism at the room temperature were analyzed by TEM. Relationship among strain, stress and creep time was studied. The creep rate of some mechanisms were calculated. The results show that the dislocation mechanism is possible. The deformation mechanism is dislocation slipping on basal plane, and twinning improves creep deformation.

 

Key words: magnesium alloy; room-temperature creep; twinning; slipping
 
 

ISSN 1672-7029
CN 43-1423/U

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