Exceptional cryogenic-to-ambient impact toughness of a low carbon micro-alloyed steel with a multi-heterogeneous structure

doi:10.1016/j.actamat.2024.120019

IMR OpenIR

	Exceptional cryogenic-to-ambient impact toughness of a low carbon micro-alloyed steel with a multi-heterogeneous structure
	Xu, Xiaoning 1; Kumar, Punit 2,3; Cao, Ruqing 4; Ye, Qibin 1; Chu, Yuexin 1,5; Tian, Yong 1; Li, Yi 4; Ritchie, Robert O.2,3
通讯作者	Tian, Yong(tianyong@ral.neu.edu.cn) ; Li, Yi(liyi@imr.ac.cn) ; Ritchie, Robert O.(roritchie@lbl.gov)
	2024-08-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	274 页码:15
摘要	A low-carbon micro-alloyed (LCMA) steel with a body-centered cubic (bcc) crystal structure suitable for extremely low temperatures was developed by overcoming the intrinsic ductile-to-brittle transition in bcc alloys at cryogenic temperatures. The excellent cryogenic-to-ambient impact toughness in the LCMA rolled plate results from its heterogeneous microstructure, which gradually changes from bamboo-like ultrafine grains (- 1.1 mu m) on the surface to relatively equiaxed coarse grains in the core (- 3.4 mu m), accompanied by a distinct texture gradient variation. The heterostructured LCMA steel displays a cryogenic impact toughness of -200 J/cm2 at 77 K, which is 24 times higher than the coarse-grained LCMA steel. Such high impact toughness of heterostructured LCMA arises from the coordinated deformation mechanisms over different length-scales coupled with delamination toughening. At 77 K, the heterostructured steel plate deforms by forming cellular sub-structures at the core to the surface, which refines the microstructure and promotes hetero-deformation induced (HDI) hardening to improve intrinsic toughening. Moreover, the subsequent delamination process induces extrinsic toughening by shielding and blunting the cracks, with the local plane-stress conditions induced by delamination promoting ductile fracture of the coarse grains in the core regions. This low alloy steel with its heterogeneous microstructure exhibits extraordinary impact toughness at cryogenic temperatures highlights the possibility of materials design strategies for sustainable development.
关键词	Heterogeneous structure Low carbon micro-alloyed steel Rolling Impact toughness Toughening mechanism
资助者	LiaoNing Revitalization Talents Program ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division
DOI	10.1016/j.actamat.2024.120019
收录类别	SCI
语种	英语
资助项目	LiaoNing Revitalization Talents Program[XLYC2007036] ; National Key Research and Development Program of China[2017YFB0702003] ; National Natural Science Foundation of China[51471165] ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division[DE-AC02-05- CH11231]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001244748900001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/187126
专题	中国科学院金属研究所
通讯作者	Tian, Yong; Li, Yi; Ritchie, Robert O.
作者单位	1.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang, Peoples R China 2.Univ Calif, Dept Mat Sci & Engn, Berkeley, CA 94720 USA 3.Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China 5.Liaoning Acad Mat, Inst Mat Plainificat, 280 Chuangxin Rd, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Xu, Xiaoning,Kumar, Punit,Cao, Ruqing,et al. Exceptional cryogenic-to-ambient impact toughness of a low carbon micro-alloyed steel with a multi-heterogeneous structure[J]. ACTA MATERIALIA,2024,274:15.
APA	Xu, Xiaoning.,Kumar, Punit.,Cao, Ruqing.,Ye, Qibin.,Chu, Yuexin.,...&Ritchie, Robert O..(2024).Exceptional cryogenic-to-ambient impact toughness of a low carbon micro-alloyed steel with a multi-heterogeneous structure.ACTA MATERIALIA,274,15.
MLA	Xu, Xiaoning,et al."Exceptional cryogenic-to-ambient impact toughness of a low carbon micro-alloyed steel with a multi-heterogeneous structure".ACTA MATERIALIA 274(2024):15.