Fatigue crack propagation in laser alloyed ductile cast iron surface

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	Fatigue crack propagation in laser alloyed ductile cast iron surface
	Li ZY(李正阳); Zhao HY; Gu Y; Zhong ML; Zhang B; Zhang HJ; Liu WJ; Ren ZY(任志远); Yang MJ(杨明江); Lin HQ; Li, ZY (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
发表期刊	JOURNAL OF LASER APPLICATIONS
	2013-02-01
卷号	25 期号:1 页码:012003/1-012003/6
ISSN	1042-346X
摘要	Due to a limited dimension of the focused laser beam, multiple passes are required to treat large surface areas, which results in overlapping of laser tracks. This process increases the cracking susceptibility and is a major barrier for the wide application of the laser treatment. To avoid the formation of cracks in multiple overlapping laser tracks, a novel technique referred to as the laser dispersed alloying (LDA) has been developed. The technique consists of creating a dispersed pattern of laser alloying on the surface to be processed. This treatment enhances the fatigue resistance of the surface layer. In the present study, the microstructure, the residual stress, and the fatigue crack growth rate (FCGR) for the ductile cast iron surface formed with the LDA technique were investigated. It was found that the fatigue resistance of the ductile cast iron is markedly increased after the LDA process, due to the compressive stresses and the fine dendritic structure formed in the laser alloying zone, the excellent bond strength between the laser alloying zone and the substrate, and the martensite shell surrounding graphite nodule in the heat affected zone near the boundary of the laser alloying zone.
关键词	Laser Dispersed Alloying Fatigue Resistance Residual Stress Ductile Cast Iron
学科领域	固体力学 ; 疲劳与断裂力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000320189600003
项目资助者	Chinese Postdoctoral Science Fund [20070410522]; Ministry of Science and Technology of the P. R. China [2009BAG12A01-B10-2]
课题组名称	MAMYAG激光毛化技术
论文分区	Q3
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46873
专题	先进制造工艺力学实验室
通讯作者	Li, ZY (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li ZY,Zhao HY,Gu Y,et al. Fatigue crack propagation in laser alloyed ductile cast iron surface[J]. JOURNAL OF LASER APPLICATIONS,2013,25,1,:012003/1-012003/6.
APA	李正阳.,Zhao HY.,Gu Y.,Zhong ML.,Zhang B.,...&Li, ZY .(2013).Fatigue crack propagation in laser alloyed ductile cast iron surface.JOURNAL OF LASER APPLICATIONS,25(1),012003/1-012003/6.
MLA	李正阳,et al."Fatigue crack propagation in laser alloyed ductile cast iron surface".JOURNAL OF LASER APPLICATIONS 25.1(2013):012003/1-012003/6.

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