Effect of cellular recrystallization on tensile properties of a nickel-based single crystal superalloy containing Re and Ru

作     者：Zhen-xue Shi Shi-zhong Liu Xiao-dai Yue Li-jie Hu Wan-peng Yang Xiao-guang Wang Jia-rong Li 

作者机构：Science and Technology on Advanced High Temperature Structural Materials LaboratoryBeijing Institute of Aeronautical MaterialsBeijing 100095China 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2017年第24卷第10期

页      面：1059-1064页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：funded by the Assembly Pre-research Foundation Program of China(140A18040115HK51248) 

主　　题：Single crystal superalloy Cellular recrystallization Tensile property Microstructure Fracture morphology 

摘      要：A nickel-based single crystal superalloy containing Re and Ru was cast in a directional solidification *** single crystal specimens after standard heat treatment were grit blasted with different pressures and then heat treated at 1100°C for 4 hunder vacuum *** evolution of recrystallized microstructure and its effect on the tensile properties at 850 and 980°C were *** heat treatment,the cellular microstructure was observed,and the thickness of the cellular recrystallization zone increases with the increase in grit blasting *** appearance of the cellular structure undermines the tensile *** the tensile strength and elongation decrease with increasing the thickness of the cellular *** recrystallized grain boundaries can act as the channels for the crack initiation and propagation during tensile *** low bearing capacity of recrystallized layers and the local stress concentration resulting from the notch effect of cracking were the main reasons for the decrease of tensile properties.