Deformation Localization and Shear Fracture of a Rapidly Solidified Al-Fe-V-Si Alloy at Elevated Temperature  

作　　者：Yongbo XU 

机构地区：[1]Shenyang National Laboratory for Materials Sciences, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110016, China

出　　处：《Journal of Materials Science & Technology》2007年第2期237-241,共5页材料科学技术（英文版）

基　　金：This research was supported by the National Natural Science Foundation of China （No. 59371039）；Professors E.A.Starke,Jr and R.P. Gangloff of University of Virginia is greatly appreciated.

摘　　要：The tensile and fatigue behavior of a dispersoid strengthened, powder metallurgy Al-Fe-V-Si alloy at ambient and elevated temperatures was investigated. The results show that the strength and ductility of the alloy decrease significantly with increasing temperature and decreasing strain rate. Micro-structural examinations reveal that this change in mechanical behavior with increasing temperature is related to the mode of deformation of the alloy. Further observations show that localized shear deformation is responsible for the losses in both strength and ductility of the alloy at elevated temperature.The tensile and fatigue behavior of a dispersoid strengthened, powder metallurgy Al-Fe-V-Si alloy at ambient and elevated temperatures was investigated. The results show that the strength and ductility of the alloy decrease significantly with increasing temperature and decreasing strain rate. Micro-structural examinations reveal that this change in mechanical behavior with increasing temperature is related to the mode of deformation of the alloy. Further observations show that localized shear deformation is responsible for the losses in both strength and ductility of the alloy at elevated temperature.

关 键 词：Al-Fe-V-Si alloy DISPERSOIDS Localized shear deformation Shear fracture Dislocations 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TF125.22[金属学及工艺—金属材料]