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摘要
The microstructure and the hardness of cast magnesium alloy Mg - 9% Li - 6% Al are studied after a treatment for solid solution at 300, 350, and 450A degrees C for 0.5 - 5 h. The phase composition of the alloy is represented by alpha-Mg, beta-Li, thin-plate and faceted particles of an AlLi phase, and particles of a MgLi2Al theta-phase. The theta-phase dissolves in the matrix in the initial stage of the solution treatment, which causes growth in the hardness of the alloy. At a temperature above 350A degrees C the AlLi phase dissolves giving way to short rod-like precipitates of a theta-phase, which remain steady in the process of solution treatment. The hardness of the alloy deceases in this stage for this reason.
- 出版日期2018-3
- 单位哈尔滨工程大学
