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Towards the understanding of rare earth microalloying on the improvement of thermal stability of intragranular austenite and mechanical property of TRIP steels

文献类型：期刊论文

作者Liu, Peng1,2; Yang, Chaoyun1; Hou, Xiaodong3,4; Zheng, Chengwu1,2; Luan, Yikun1,2; Chen, Honglei5; Ma, Guangcai5; Li, Dianzhong1,2
刊名MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期2024-11-01
卷号914页码:8
关键词TRIP steel Rare earth elements Intragranular austenite Dislocation Core-shell structure
ISSN号0921-5093
DOI10.1016/j.msea.2024.147135
通讯作者Luan, Yikun(ykluan@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn)
英文摘要Existing sites of dissolved rare earth (RE) atoms have not been accurately identified owning to their extremely low solid-solubility in steels, leaving behind the ambiguity of RE-microalloying on microstructure tailoring and performance optimizing for a few decades. Here, RE clusters are directly observed inside ferrite of TRIP steels, causing solute-drag effect on dislocation movement. RE addition can also enhance the solubility of V in austenite, leading to more precipitations of carbides inside austenite. The austenite-ferrite boundaries assisted by these carbides provide strong pinning effect on dislocation motion from ferrite to austenite, thereby forming the unique core-shell structure of dislocations within intragranular austenite. The dislocation shell offers additional diffusion channels for C/Mn partition and restricts volume expansion of austenite cores, hence increasing the thermal stability of intragranular austenite and optimizing the strength-ductility balance of TRIP steels.
资助项目National Natural Science Foundation of China[52321001] ; National Natural Science Foundation of China[52101165] ; National Natural Science Foundation of China[52031013] ; National Natural Science Foundation of China[52071322] ; Key Research Program of the Chinese Academy of Sciences[ZDRW-CN-2021-3]
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001300622400001
出版者ELSEVIER SCIENCE SA
资助机构National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences
源URL  
专题金属研究所_中国科学院金属研究所
通讯作者Luan, Yikun; Li, Dianzhong
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Natl Inst Metrol, Div Mech & Acoust, Beijing 100013, Peoples R China
4.NIM, Shenzhen Inst Technol Innovat, Shenzhen 518107, Peoples R China
5.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Peng,Yang, Chaoyun,Hou, Xiaodong,et al. Towards the understanding of rare earth microalloying on the improvement of thermal stability of intragranular austenite and mechanical property of TRIP steels[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,914:8.
APA Liu, Peng.,Yang, Chaoyun.,Hou, Xiaodong.,Zheng, Chengwu.,Luan, Yikun.,...&Li, Dianzhong.(2024).Towards the understanding of rare earth microalloying on the improvement of thermal stability of intragranular austenite and mechanical property of TRIP steels.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,914,8.
MLA Liu, Peng,et al."Towards the understanding of rare earth microalloying on the improvement of thermal stability of intragranular austenite and mechanical property of TRIP steels".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 914(2024):8.

入库方式： OAI收割

来源：金属研究所

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