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김영우,황영하,임용진,김도향,홍준표,Kim, Y.W.,Kwang, Y.H.,Lim, Y.J.,Kim, D.H.,Hong, C.P. 한국열처리공학회 1998 熱處理工學會誌 Vol.11 No.1
The softening behavior of squeeze cast Mg-Li-Al and Mg-Li-Al-Zr alloys have been investigated. The highest hardness values of Mg-Li-Al and Mg-Li-Al-Zr alloys were obtained after solution treatment at $400^{\circ}C$ for 1 hour. The hardness value, however, decreased as the aging temperature and time increased. Microstructural and calorometric analyses showed that quenched-microstructure changed from primary (${\alpha}$ and ${\beta}$)+secondary ${\alpha}$ to primary(${\alpha}$ and ${\beta}$)+secondary ${\alpha}+{\theta}$ after aging. The softening during aging was due to the coarsening of ${\theta}$ precipitates.
김영우,황영하,임용진,김도향,홍준표 ( Y . W . Kim,Y . H . Kwang,Y . J . Lim,D . H . Kim,C . P . Hong ) 한국열처리공학회 1998 熱處理工學會誌 Vol.11 No.1
The softening behavior of squeeze cast Mg-Li-Al and Mg-Li-Al-Zr alloys have been investigated. The highest hardness values of Mg-Li-Al and Mg-Li-Al-Zr alloys were obtained after solution treatment at 400℃ for 1 hour. The hardness value, however, decreased as the aging temperature and time increased. Microstructural and calorometric analyses showed that quenched-microstructure changed from primary (α and β)+secondary α to primary(α and β)+secondary α+θ after aging. The softening during aging was due to the coarsening of θ precipitates.