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《Ordnance Material Science and Engineering》 2007-06
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Study on recrystallization of Mg-Al-Zn-Nd magnesium alloy during hot-compression

XIA Cui-qin1, LIU Ping1, TIAN Bao-hong1, REN Feng-zhang1, ZHAO Dong-mei1,DONG Qi-ming2 (1.School of Material Science and Engineering, Henan University of Science and Technology, Luoyang 471039,China; 2.Henan University of Technology, Zhengzhou 450052, China)  
The compression tests of Mg-Al-Zn-Nd alloy have been conducted on Gleeble-1500D hot simulation equipment. The results show that the flow stress becomes larger with increasing strain rate at the same temperature, and gets smaller with increasing deformation temperature at the same strain rate. The compressed amount does not apparently affect the relationship between the compressing stress and strain under the same deformation conditions. Dynamic recrystallization takes place during the deformation process. With deformation increasing, the amount of dynamic recrystallization grains increases, the materials take on obvious tendency of softening, and flow stress declines as well. After the completion of dynamic recrystallization process, the material is hardened again if deformation continues. The natural logarithm of dynamic recrystallization grains size is linear with the natural logarithm of Zener-Hollomon parameter. The temperature of 400~450 ℃ with strain rate of 0.1~5 s-1 is suggested for hot deformation of this alloy.
【Fund】: 洛阳市科技攻关项目(0602018A-1);; 河南省高校创新人才基金(豫教高2005-126)
【CateGory Index】: TG115.53
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