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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 4    December 1999

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Aging behavior of Mg-Li-Al alloys
Ma Chunjiang(马春江); Zhang D i(张荻); Qin Jining(覃继宁); Hu Wenbin(胡文彬); Shi Zhongliang(施忠良)

State Key Lab of MMCs; Shanghai Jiao Tong University; Shanghai 200030; P. R. China

Abstract:A system study on aging behavior and the influence of heat treatment on mechanical property of Mg8LilAl and Mg11Li3Al alloys has been carried out. The results show that the alloys described above have apparent aging behavior and over aging happens even at room temperature. θ (MgLi2Al) phase has been identified when hardness reaches aging peak. With the increase of aging temperature, the size of 8(MgLi2Al)phase becomes larger apparently and 0ver aging happens. Heat treatment can raise tensile strength of Mg8Li1Al and Mg11Li3Al alloys, but the elongation decreases greatly.

 

Key words:  Mg-Li-Al alloys; aging; mechanical property

ISSN 1672-7029
CN 43-1423/U

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