Fatigue crack propagation in laser alloyed ductile cast iron surface

CORC > 力学研究所 > 中国科学院力学研究所 > 先进制造工艺力学重点实验室

	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
刊名	JOURNAL OF LASER APPLICATIONS
	2013-02-01
通讯作者邮箱	zyli@imech.ac.cn
卷号	25 期号:1 页码:012003/1-012003/6
关键词	Laser dispersed alloying Fatigue resistance Residual stress Ductile cast iron
ISSN号	1042-346X
通讯作者	Li, ZY (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
产权排序	[Li, Zheng-yang; Ren, Zhi-yuan; Yang, Ming-jiang] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; [Li, Zheng-yang; Zhao, Hai-yan; Gu, Yu; Zhong, Min-lin; Zhang, Bin; Zhang, Hong-jun; Liu, Wen-jin] Tsinghua Univ, Dept Mech Engn, Key Lab Adv Mfg Mat Proc Technol, Beijing 100084, Peoples R China; [Lin, Hua-qiang] CSR Qingdao Sifang Co Ltd, Natl Engn Lab Syst Integrat High Speed Train Sout, Qingdao 266111, Shandong, Peoples R China
合作状况	国内
中文摘要	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.
学科主题	疲劳与断裂力学
分类号	Q3
收录类别	SCI ; EI
资助信息	Chinese Postdoctoral Science Fund [20070410522]; Ministry of Science and Technology of the P. R. China [2009BAG12A01-B10-2]
原文出处	http://dx.doi.org/10.2351/1.4773250
语种	英语
WOS记录号	WOS:000320189600003
公开日期	2013-02-28
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/46873]
专题	力学研究所_先进制造工艺力学重点实验室
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.,...&Lin HQ.(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.