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Thixoforming of AI7075 Alloy with High Solid Fraction
Amir Bolouri(아미르 볼루리),Chang Hyun Jang(장창현),Mohammad Shahmirl(모하메드 샤미리),Chung Gil Kang(강충길) 한국소성가공학회 2011 한국소성가공학회 학술대회 논문집 Vol.2011 No.10
Aluminum 7075 alloy has been used as the feedstock for thixoforming in order to investigate the thixoformability of the alloy at high solid fratcions. Strain induced melting activation (SIMA) route has been employed to prepare the alloy to behave as the thixotropic material when reheated into the semisolid state. The results of reheating experiments at 590℃, 600℃ and 610℃ corresponding to high slid fractions (above 0.75) are presented. The reheating experiments were conducted for various holding times: 10min, 15min and 20min. According to the microstructure was achieved. Thixforming experimental at 590℃ failed. At 610℃, the optimum forming condition obtained for 300kN and 400kN at 0.75m/s ram speed.