|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||Effect of Heat-treatment on Microstructure and Mechanical Properties of Sonicated Multicomponent AlMgSiCuZn Alloy
||Kwangjun Euh, Jae-Gil Jung, Eunji Baek, Jung-Moo Lee, Hyoung-Wook Kim
|On-Site Speaker (Planned)
In this study, an Al63Mg8Si9Cu10Zn10 (in wt%) alloy is fabricated with a high volume fraction of coarse secondary phases, which is higher fraction than in the conventional piston alloys. Ingots are cast in a permanent mold after an ultrasonic melt treatment for 60s at the temperature range of 750 to 700oC. Microstructure of AlMgSiCuZn alloy consists of Si, Zn, Mg2Si, Q-Al5Cu2Mg8Si6, and θ-Al2Cu phases. By the annealing at 440oC, Q-phase at the vicinity of blocky Mg2Si phase grows and the roundness of the second phases increases with respect to the annealing time. Compared with the as-cast specimen, compressive fracture stress of the annealed specimens at room temperature increases. However, maximum compressive stress at 350oC is slightly decreased by annealing. The effect of annealing on the mechanical properties of AlMgSiCuZn alloy is elucidated by means of microstructural analysis.
||Planned: Light Metals