Surface strengthening behaviors of four structural steels processed by surface spinning strengthening

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	Surface strengthening behaviors of four structural steels processed by surface spinning strengthening
	Ren, C. X.; Wang, Q.; Zhang, Z. J.; Zhang, P.; Zhang, Z. F.; Wang, Q; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
刊名	ELSEVIER SCIENCE SA
	2017-09-17
卷号	704 页码:262-273
关键词	Structural Steel Yield Strength Surface Spinning Strengthening (3s) Microhardness Gradient Microstructure
ISSN号	0921-5093
英文摘要	Surface strengthening is an effective method to improve the service life of some important engineering components. In this study, four structural steels with different yield strength were treated by surface spinning strengthening (3S) technology, which created a hardened layer in the surface layer by applying the shear stress and compressive stress. As a result, the grains in the surface layers were refined to different dimensions with the increase of the depth to the surface, and the grains in the topmost surface layer were refined to nano-scale. The microhardness in the hardened layer increases dramatically due to the grain refinement and strain strengthening. Furthermore, an exponential-type microhardness model for the hardened layer was proposed to characterize the surface strengthening behaviors of the four structural steels with different yield strength. Especially, in the model, some parameters related to the nature of the hardened layer, including Hv(M)/Hv(m) (maximum microhardness increment ratio), lambda (thickness of the hardened layer), R (surface strengthening exponent) and E (surface strengthening energy) were analyzed on the basis of the microstructure and microhardness evolution in the hardened layer. Results show that with the increase of the yield strength, Hv(M)/Hv(m), lambda and E/Hv(m) are decreasing, while R is increasing. The metal with a low yield strength is easy to obtain a thicker hardened layer and a better surface strengthening effect, i.e., higher surface strengthening energy and lower surface strengthening exponent.; Surface strengthening is an effective method to improve the service life of some important engineering components. In this study, four structural steels with different yield strength were treated by surface spinning strengthening (3S) technology, which created a hardened layer in the surface layer by applying the shear stress and compressive stress. As a result, the grains in the surface layers were refined to different dimensions with the increase of the depth to the surface, and the grains in the topmost surface layer were refined to nano-scale. The microhardness in the hardened layer increases dramatically due to the grain refinement and strain strengthening. Furthermore, an exponential-type microhardness model for the hardened layer was proposed to characterize the surface strengthening behaviors of the four structural steels with different yield strength. Especially, in the model, some parameters related to the nature of the hardened layer, including Hv(M)/Hv(m) (maximum microhardness increment ratio), lambda (thickness of the hardened layer), R (surface strengthening exponent) and E (surface strengthening energy) were analyzed on the basis of the microstructure and microhardness evolution in the hardened layer. Results show that with the increase of the yield strength, Hv(M)/Hv(m), lambda and E/Hv(m) are decreasing, while R is increasing. The metal with a low yield strength is easy to obtain a thicker hardened layer and a better surface strengthening effect, i.e., higher surface strengthening energy and lower surface strengthening exponent.
学科主题	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
资助机构	National Natural Science Foundation of China (NSFC) [51331007, U1664253]
公开日期	2018-01-10
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79092]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Q; Zhang, ZF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Ren, C. X.,Wang, Q.,Zhang, Z. J.,et al. Surface strengthening behaviors of four structural steels processed by surface spinning strengthening[J]. ELSEVIER SCIENCE SA,2017,704:262-273.
APA	Ren, C. X..,Wang, Q..,Zhang, Z. J..,Zhang, P..,Zhang, Z. F..,...&Zhang, ZF .(2017).Surface strengthening behaviors of four structural steels processed by surface spinning strengthening.ELSEVIER SCIENCE SA,704,262-273.
MLA	Ren, C. X.,et al."Surface strengthening behaviors of four structural steels processed by surface spinning strengthening".ELSEVIER SCIENCE SA 704(2017):262-273.