On the γ' precipitates of the normal and inverse Portevin-Le Chatelier effect in a wrought Ni-base superalloy  

作　　者：Xinguang Wang Guoming Han Chuanyong Cui Shuai Guan Jinguo Li Guichen Hou Yizhou Zhou Xiaofeng Sun 

机构地区：[1]Institute of Metal Research, Chinese Academy of Sciences

出　　处：《Journal of Materials Science & Technology》2019年第1期84-87,共4页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51601192,51671188,51671189and 11332010);the High Technology Research and Development Program of China(No.2014AA041701)

摘　　要：The Portevin-Le Chatelier(PLC) effects in a wrought Ni-base superalloy with different γ' precipitates contents have been investigated. Detailed analysis on the serration type of the tensile curves indicates that the γ' precipitates have a decisive influence on the transformation from normal to inverse PLC behavior, which is rarely proposed in other works. It is considered that the γ' precipitates play the same role in PLC effect as temperature and strain rate for the investigated wrought Ni-base superalloy.The Portevin-Le Chatelier(PLC) effects in a wrought Ni-base superalloy with different γ' precipitates contents have been investigated. Detailed analysis on the serration type of the tensile curves indicates that the γ' precipitates have a decisive influence on the transformation from normal to inverse PLC behavior, which is rarely proposed in other works. It is considered that the γ' precipitates play the same role in PLC effect as temperature and strain rate for the investigated wrought Ni-base superalloy.

关 键 词：NORMAL and INVERSE PLC effec γ’ PRECIPITATES Dynamic STRAIN aging Critical STRAIN WROUGHT Ni-base superalloy 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TG316[金属学及工艺—金属材料]