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

doi:10.1016/j.msea.2024.147135

IMR OpenIR

	Towards the understanding of rare earth microalloying on the improvement of thermal stability of intragranular austenite and mechanical property of TRIP steels
	Liu, Peng 1,2; Yang, Chaoyun 1; Hou, Xiaodong 3,4; Zheng, Chengwu 1,2; Luan, Yikun 1,2; Chen, Honglei 5; Ma, Guangcai 5; Li, Dianzhong 1,2
通讯作者	Luan, Yikun(ykluan@imr.ac.cn) ; Li, Dianzhong(dzli@imr.ac.cn)
	2024-11-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	914 页码:8
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.
关键词	TRIP steel Rare earth elements Intragranular austenite Dislocation Core-shell structure
资助者	National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences
DOI	10.1016/j.msea.2024.147135
收录类别	SCI
语种	英语
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
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001300622400001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/189365
专题	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.