Research on flow stress of spray formed 70Si30Al alloy under hot compression deformation  

作　　者：WEI Yanguang XIONG Baiqing ZHANG Yong＇an LIU Hongwei ZHU Baohong WANG feng 

机构地区：[1]State Key Laboratory for Fabrication ＆ Processing of Non-ferrous Metals, Beijing General Research Institute for Non-ferrous Metals, Beijing 100088,China

出　　处：《Rare Metals》2006年第6期665-670,共6页稀有金属（英文版）

基　　金：This work was financially supported by the National Basic Research Program of China (No. G20000672).

摘　　要：The flow stress of spray formed 70Si30Al alloy was studied by hot compression on a Gleeble- 1500 test machine. The experimental results indicated that the flow stress depends on the strain rate and the deformation temperature. The flow stress increases with an increase in strain rate at a given deformation temperature. The flow stress decreases with the deformation temperature increasing at a given strain rate. The relational expression among the flow stress, the swain rate, and the deformation temperature satisfies the Arrhenius equation. The deformation activation energy of 70Si30Al alloy during hot deformation is 866.27 kJ/mol from the Arrhenius equation.The flow stress of spray formed 70Si30Al alloy was studied by hot compression on a Gleeble- 1500 test machine. The experimental results indicated that the flow stress depends on the strain rate and the deformation temperature. The flow stress increases with an increase in strain rate at a given deformation temperature. The flow stress decreases with the deformation temperature increasing at a given strain rate. The relational expression among the flow stress, the swain rate, and the deformation temperature satisfies the Arrhenius equation. The deformation activation energy of 70Si30Al alloy during hot deformation is 866.27 kJ/mol from the Arrhenius equation.

关 键 词：70Si30Al alloy spray forming flow stress hot compression An＇henius equation 

分 类 号：TG11[金属学及工艺—物理冶金]