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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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mechanical properties of Mg-Gd alloy
ZHANG Xiao-juan(张小娟), YI Dan-qing(易丹青), FANG Xi-ya(方西亚),
WANG Bin(王  斌), XIAO Lai-rong(肖来荣)

School of Materials Science and Engineering, Central South University, Changsha 410083, China

Abstract:Two alloys of Mg-12.4Gd and Mg-12.5Gd-0.8Sc-1.4Mn were prepared. Hot extrusion and T5 heat treatment were conducted, and then the mechanical properties of the two alloys were tested at room and high temperatures. The effects of Sc, Mn on the microstructures of Mg-12.4Gd were investigated by optical microscopy, scanning electron microscopy and transmission electron microscopy. The results demonstrate that after hot-extrusion the alloying with Sc, Mn can efficaciously refine the grains of Mg-12.4Gd alloy; and increase the elongation at room and high temperatures after T5 heat treatment. But the strength at high temperature is not obviously improved.

 

Key words: Mg-Gd-Sc-Mn alloy; hot-extrusion; microstructures; mechanical properties

ISSN 1672-7029
CN 43-1423/U

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