Tailoring the microstructure by prior treatment to achieve 37.6 GPa?% PSE in a room-temperature quenched and partitioned steel

doi:10.1016/j.matchar.2024.114497

IMR OpenIR

	Tailoring the microstructure by prior treatment to achieve 37.6 GPa?% PSE in a room-temperature quenched and partitioned steel
	Wang, Xu 1,2; Xu, Yunbo 1; Guo, Jiapeng 1; Wang, Yuan 1; Ren, Jingyi 3; Misra, R. D. K.4
通讯作者	Xu, Yunbo(yunbo_xu@126.com)
	2024-12-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	218 页码:14
摘要	In this work, different initial microstructures, including deformed cold-rolled structure, quenched martensite, granular bainite, and lathy bainite, were intentionally designed through cold rolling and prior treatment. Meanwhile, a novel room-temperature quenching and partitioning (RT-Q&P) process was proposed to further enhance strength-ductility combination of Cu-Ni bearing Q&P. The present study aims to investigate the influences of initial microstructures on the formation kinetics of austenite, the mechanical stability of RA, microstructure evolution, and mechanical performance in Q&P steel treated by RT-Q&P process. Compared to sample without prior treatment, samples with prior treatment showed a larger austenization degree due to more nucleation sites on martensite/bainite matrix. DICTRA simulation indicates the lathy bainite matrix with low C and low Mn is more conducive to the refinement of parent austenite, thus leading to fine and dispersive TM/A. During tensile deformation, the fine and dispersive lath-structures can effectively alleviate strain localization on the interfaces which resulted from the deformability difference between the soft and hard phases, thereby delaying crack initiation and propagation. After RT-Q&P treatment, the outstanding mechanical properties with UTS of 1152 MPa, TEL of 32.6 %, YS of 754 MPa, and PSE of 37.6 GPa center dot% was achieved in sample with lathy bainite matrix, far exceeding the properties of traditional Q&P steels, which was mainly attributed to higher work-hardening ability of fine and dispersive structure and sustained TRIP effect of RA.
关键词	Prior treatment TRIP effect Mechanical properties Q&P steel RT-Q&P process
资助者	National Natural Science Foundation of China ; National Key R & D Program of China ; Key R & D Program of Shandong Province
DOI	10.1016/j.matchar.2024.114497
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51974085] ; National Natural Science Foundation of China[51674080] ; National Key R & D Program of China[2017YFB0304105] ; National Key R & D Program of China[2017YFB0304400] ; Key R & D Program of Shandong Province[2019TSLH0103]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001354537900001
出版者	ELSEVIER SCIENCE INC
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191396
专题	中国科学院金属研究所
通讯作者	Xu, Yunbo
作者单位	1.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Shenyang Aircraft Corp, Shenyang 110034, Peoples R China 4.Univ Texas El Paso, Dept Met Mat & Biomed Engn, El Paso, TX 79968 USA
推荐引用方式 GB/T 7714	Wang, Xu,Xu, Yunbo,Guo, Jiapeng,et al. Tailoring the microstructure by prior treatment to achieve 37.6 GPa?% PSE in a room-temperature quenched and partitioned steel[J]. MATERIALS CHARACTERIZATION,2024,218:14.
APA	Wang, Xu,Xu, Yunbo,Guo, Jiapeng,Wang, Yuan,Ren, Jingyi,&Misra, R. D. K..(2024).Tailoring the microstructure by prior treatment to achieve 37.6 GPa?% PSE in a room-temperature quenched and partitioned steel.MATERIALS CHARACTERIZATION,218,14.
MLA	Wang, Xu,et al."Tailoring the microstructure by prior treatment to achieve 37.6 GPa?% PSE in a room-temperature quenched and partitioned steel".MATERIALS CHARACTERIZATION 218(2024):14.