The precipitation and effect of topologically close-packed phases in Ni-based single crystal superalloys  

作　　者：Jinguo Li Jingxia Sun Jinlai Liu Xiaofeng Sun 

机构地区：[1]Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China

出　　处：《Journal of Materials Science & Technology》2024年第6期149-169,共21页材料科学技术（英文版）

基　　金：financially supported by the National Science and Technology Major Project(No.2019-VII-0019-0161);Science Center for Gas Turbine Project(No.P2021-A-Ⅳ-001-002);National Key Research and Development Program of China under Grant(No.2017YFA0700704);National Natural Science Foundation of China(No.51971214).

摘　　要：The precipitation of topologically close-packed(TCP)phases is the result of microstructure instabilities of Ni-based superalloys.This review seeks to comprehensively collate all the available information on TCP phases in SX superalloys based on the latest findings.First,the thermodynamics and kinetics of the TCP phase precipitation are introduced.Meanwhile,the morphology,composition and orientation of TCP phases and their sequential transformation are summarized in detail.Further,the factors affecting the precipitation of these phases are sorted out.Besides,the proposed damage mechanisms of TCP phases are listed.Finally,several control and prediction methods of the TCP phase precipitation are reviewed,so the alloy designer can better balance the relationship between microstructure stabilities and properties of the superalloy.

关 键 词：Ni-based superalloys Topologically close packed(TCP)phases PRECIPITATION Microstructure stability PROPERTIES 

分 类 号：TG132.3[一般工业技术—材料科学与工程]