Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 9 No. 4 December 1999|
（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