Effect of electric current on secondary phase dissolution and elements migration behavior of a Ni-based single crystal superalloy  

作　　者：Ying-ju Li Ce Zheng Xiao-hui Feng Qiu-yan Huang Tian-jiao Luo Yuan-sheng Yang 

机构地区：[1]Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,Liaoning,China

出　　处：《Journal of Iron and Steel Research International》2024年第12期3037-3047,共11页钢铁研究学报(英文版)

基　　金：The authors gratefully acknowledge the financial support by the National Key Research and Development Program(No.2018YFA0702900);National Science and Technology Major Project(No.J2019-VII-0002-0142);the National Natural Science Foundation of China(No.51831007).

摘　　要：The second phase dissolution and elements migration behavior of a nickel-based single crystal superalloy during solution heat treatment with direct current were investigated for simplifying and shortening the solution heat treatment of the Ni-based single crystal superalloy.The results showed that the electric current solution heat treatment improved microstructural homogenization as well as the distribution of alloying elements,especially for the refractory metal W and Mo.The microsegregation ratios for Mo and W after electric current solution heat treatment at 1230℃for 4 h are near those without electric current at 1250℃for 4 h.The electric current accelerated theγ′phase dissolution process,and theγ′phase could be completely dissolved at a lower treatment temperature or within a shorter treatment time under electric current solution heat treatment with direct current.A microcosmic current model was proposed to analyze the effect of the electric current on the solution heat treatment of the Ni-based single crystal superalloy.

关 键 词：Ni-based single crystal superalloy Electric current Solution heat treatment ELECTROMIGRATION Element segregation 

分 类 号：TG132.3[一般工业技术—材料科学与工程]