Abstract
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.
基金项目
National Science and Technology Major Project(2019-VII-0019-0161)
Science Center for Gas Turbine Project(P2021-A-IV-001-002)
National Key Research and Development Program of China(2017YFA0700704)
National Natural Science Foundation of China(51971214)
NETL
NSTL
万方数据