Determination of stacking fault energies in a high-Nb TiAl alloy at 298 K and 1273 K

作     者：XipingSong LinCao YanliWang JunpinLin GuoliangChen 

作者机构：StateKeyLaboratoryforAdvancedMetalsandMaterialsUniversityofScienceandTechnologyBeijingBeijing100083China ScienceandEngineeringSchoolUniversityofScienceandTechnologyBeijingBeijing100083China 

出 版 物：《Journal of University of Science and Technology Beijing》 (北京科技大学学报（英文版）)

年 卷 期：2004年第11卷第1期

页      面：35-38页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0703[理学-化学] 0802[工学-机械工程] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：The work was financial supported by the National Natural Science Foundation of China (No.59895151) 

主　　题：stacking fault energy TiAl alloy temperature dislocation 

摘      要：The stacking fault energies of Ti-46Al-8.5Nb-0.2W alloy at 298 K and 1273 Kwere determined. The principle for the determination of the stacking fault energies is based on thefact that the stacking fault energy and the elastic interaction energy acting on the dissociatedpartial dislocations are equal. After the compress deformations with the strain of 0.2% at 298 K and1273 K, and water quench to maintain the dislocation structures deformed at 1273 K, thedissociation distances between two partial dislocations were determined by weak beam transmissionelectron microscopy (WBTEM) technique. Based on these dissociation distances and the correspondingcalculation method, the stacking fault energies were determined to be 77-81 mJ/m^2 at 298 K and tobe 57-60mJ/m^2 at 1273 K respectively.