Mechanical behavior and deformation mechanism of nano/ultrafine grained austenitic stainless steel at cryogenic, room, and elevated temperatures

doi:10.1016/j.msea.2025.147870

IMR OpenIR

	Mechanical behavior and deformation mechanism of nano/ultrafine grained austenitic stainless steel at cryogenic, room, and elevated temperatures
	Lei, Chengshuai 1,2; Liu, Hongwei 1; Deng, Xiangtao 2; Li, Xiaolin 3; Wang, Zhaodong 2
通讯作者	Deng, Xiangtao(dengxiangtao123@163.com) ; Li, Xiaolin(xiaolinli@nwpu.edu.cn)
	2025-03-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	925 页码:11
摘要	Nano/ultrafine-grained (Nano/UFG) austenitic stainless steel (ASS) has attracted considerable attention in recent years due to its excellent combination of ultra-high strength and good ductility. However, few studies have focused on its mechanical response at cryogenic and elevated temperatures. In this study, the mechanical properties and microstructure evolution of Nano/UFG steel during tensile testing at temperatures ranging from -60 to 100 degrees C were systematically investigated. The aim was to reveal the mechanical response of Nano/UFG steel at different temperatures and the correlation between mechanical behavior and deformation mechanism. The results show that the yield strength of Nano/UFG ASS is almost unaffected by the deformation temperature, but the ultimate tensile strength (UTS) and tensile elongation (TE) vary significantly at different temperatures. When deformed at temperatures lower than 60 degrees C, Nano/UFG ASS achieves relatively high UTS and TE due to the strong hardening caused by martensitic transformation and deformation twinning. However, when deformed at 100 degrees C, the tensile ductility decreases dramatically due to the inhibition of dislocation gliding by the small grain size. Microstructural characterization reveals that the deformation mechanism of Nano/UFG ASS is influenced by both the stacking fault energy and grain size. The dominant deformation mechanism changes from deformationinduced gamma -> alpha ' martensitic transformation at -60 degrees C to a combination of martensitic transformation and deformation twining at 20 degrees C, further to martensitic transformation at 60 degrees C, and finally to stacking faults at 100 degrees C. Additionally, the differences in the deformation mechanism between coarse-grained ASS and Nano/UFG ASS at different temperatures are also clarified.
关键词	Nano/ultrafine grained steel Stacking fault energy Deformation mechanism Deformation temperature
资助者	National Natural Science Foundation of China ; National Basic Research Program, China
DOI	10.1016/j.msea.2025.147870
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52201053] ; National Natural Science Foundation of China[52274380] ; National Natural Science Foundation of China[U23A20613] ; National Basic Research Program, China[2022YFB3705300]
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:001405336800001
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/321006/180349
专题	中国科学院金属研究所
通讯作者	Deng, Xiangtao; Li, Xiaolin
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110004, Peoples R China 3.Northwestern Polytech Univ, Ctr Adv Lubricat & Seal Mat, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
推荐引用方式 GB/T 7714	Lei, Chengshuai,Liu, Hongwei,Deng, Xiangtao,et al. Mechanical behavior and deformation mechanism of nano/ultrafine grained austenitic stainless steel at cryogenic, room, and elevated temperatures[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2025,925:11.
APA	Lei, Chengshuai,Liu, Hongwei,Deng, Xiangtao,Li, Xiaolin,&Wang, Zhaodong.(2025).Mechanical behavior and deformation mechanism of nano/ultrafine grained austenitic stainless steel at cryogenic, room, and elevated temperatures.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,925,11.
MLA	Lei, Chengshuai,et al."Mechanical behavior and deformation mechanism of nano/ultrafine grained austenitic stainless steel at cryogenic, room, and elevated temperatures".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 925(2025):11.