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539324 
Journal Article 
Effect of deformation temperature and strain rate on semi-solid deformation behavior of spray-formed Al-70%Si alloys 
Zhang, D; Yang, B; Zhang, JS; Zhang, YA; Xiong, BQ 
2005 
1 
Transactions of Nonferrous Metals Society of China
ISSN: 1003-6326 
15 
5 
1125-1129 
English 
Spray-formed Al-70%Si(mass fraction) alloys were deformed by compression in the semi-solid state. The effects of the deformation temperature, strain rate and the microstructure were studied. Two strain rates(1s(-1) and 0.1 s(-1)) and six deformation temperatures (600 degrees C, 720 degrees C, 780 degrees C, 900 degrees C, 1000 degrees C and 1100 degrees C) were chosen. The stress-strain curve exhibits a peak at low strain and then decreases to a plateau before it starts to increase again as the strain increases. The stress required for deformation at lower strain rate and at higher deformation temperatures is less than those at higher strain rate and at lower deformation temperatures. Four mechanisms of semisolid deformation can be used to explain the different behaviors of the stress-strain curves under different conditions. 
Al-70%Si alloy; semi-solid state; stress-strain curve; state; pb