Microstructure and mechanical properties of a cast TRIP-assisted multiphase stainless steel

作     者：Meng-xin Wang Zi-xiang Wu Jing-yu He Xiang Chen Meng-xin Wang;Zi-xiang Wu;Jing-yu He;Xiang Chen

作者机构：School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory for Advanced Materials Processing TechnologyMinistry of EducationBeijing 100084China 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2024年第21卷第3期

页      面：221-228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：supported by the Inner Mongolia Autonomous Region Science and Technology Major Special Project(Grant No.2021SZD0082) 

主　　题：multiphase stainless steel mechanical properties TRIP effect reversed austenite G-phase 

摘      要：Stainless steels are used in a wide range of complex environments due to their excellent corrosion *** stainless steels can offer an excellent combination of strength,toughness and corrosion resistance due to the coexistence of different *** microstructure and mechanical properties of a novel cast multiphase stainless steel,composed of martensite,ferrite,and austenite,were investigated following appropriate heat treatment processes:solution treatment at 1,050℃ for 0.5 h followed by water quenching to room temperature,and aging treatment at 500℃ for 4 h followed by water quenching to room *** show reversed austenite is formed by diffusion of Ni element during aging process,and the enrichment of Ni atoms directly determines the mechanical stability of *** austenite with a lower Ni content undergoes a martensitic transformation during plastic *** tensile strength of the specimen exceeds 1,100 MPa and the elongation exceeds 24%after solid solution,and further increases to 1,247 MPa and 25%after aging *** enhancement is due to the TRIP effect of austenite and the precipitation of the nanoscale G-phase pinning dislocations in ferrite and martensite.