|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 Al<SUB>63</SUB>Mg<SUB>8</SUB>Si<SUB>9</SUB>Cu<SUB>10</SUB>Zn<SUB>10</SUB> (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 700<SUP>o</SUP>C. Microstructure of AlMgSiCuZn alloy consists of Si, Zn, Mg<SUB>2</SUB>Si, Q-Al<SUB>5</SUB>Cu<SUB>2</SUB>Mg<SUB>8</SUB>Si<SUB>6</SUB>, and θ-Al<SUB>2</SUB>Cu phases. By the annealing at 440<SUP>o</SUP>C, Q-phase at the vicinity of blocky Mg<SUB>2</SUB>Si 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 350<SUP>o</SUP>C 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