Strain-induced formation of a gradient nanostructured surface layer on an ultrahigh strength bearing steel

doi:10.1016/j.jmst.2017.12.012

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	Strain-induced formation of a gradient nanostructured surface layer on an ultrahigh strength bearing steel
	Zhang, L ; Wang, ZB
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2018-09-01
卷号	34 期号:9 页码:1676-1684
关键词	Gradient nanostructured Ultrahigh strength bearing steel Plastic deformation Martensite Surface mechanical rolling treatment
ISSN号	1005-0302
DOI	10.1016/j.jmst.2017.12.012
英文摘要	In the present work, an ultrahigh strength bearing steel (AISI 52100) was subjected to surface mechanical rolling treatment (SMRT) at room temperature. Microstructural observations showed that martensitic laths, twins and cementite particles in the initial microstructure underwent distinct plastic strains and were gradually refined into nanostructures. Consequently, a gradient nanostructured (GNS) surface layer with a mean grain size of similar to 24 nm at the top surface was obtained on the bearing steel, resulting in an increment of similar to 20% in the surface hardness. Analyses based on microstructural evolution, phase constitution and in-depth hardness distribution revealed a mechanically induced formation mechanism of the GNS surface layer. The multiple surface severe plastic deformation under fine lubrication and cooling during SMRT contributed to the formation of a thick hardened surface layer on the bearing steel. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000438129900027
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80000]
专题	金属研究所_中国科学院金属研究所
作者单位	1.[Zhang, L. 2.Wang, Z. B.] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.[Zhang, L.] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, L,Wang, ZB. Strain-induced formation of a gradient nanostructured surface layer on an ultrahigh strength bearing steel[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(9):1676-1684.
APA	Zhang, L,&Wang, ZB.(2018).Strain-induced formation of a gradient nanostructured surface layer on an ultrahigh strength bearing steel.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(9),1676-1684.
MLA	Zhang, L,et al."Strain-induced formation of a gradient nanostructured surface layer on an ultrahigh strength bearing steel".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.9(2018):1676-1684.