Phase-field modelling of spinodal decomposition with G-phase precipitation during ageing

作     者：SHI JiaQing SHEN Yao SHI JiaQing;SHEN Yao

作者机构：The State Key Lab of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2021年第64卷第12期

页      面：2568-2576页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：the National Key Research and Development Program of China(Grant No.2017YFB0702201) 

主　　题：ferrite DSSs spinodal decomposition G-phase phase-field model 

摘      要：The duplex stainless steels(DSSs)are susceptible to thermal ageing embrittlement due to the spinodal decomposition and Gphase precipitation in the ferritic *** study presents a ternary(Fe-Cr-Ni)phase-field model for the simulation of spinodal decomposition with concurrent G-phase *** Cahn-Hilliard equations and one Ginzburg-Landau equation are used in the model to describe the diffusion of Cr,Ni,and the growth of G-phase,*** model is able to generate a spinodally-interconnected structure with G-phase particles near theα-α′interfaces,similar to experimental *** kinetic synergy between spinodal decomposition and G-phase precipitation is *** simulation results indicate that Gphase can enhance the evolution of spinodal decomposition by occupying the volume where the decomposition could otherwise occur,and that the system’s elastic strain energy is largely contributed by G-phase rather than spinodal *** results would help in better understanding the states of the materials for plant structural integrity assessment and life management.