| 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
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| Source Publication | JOURNAL OF LASER APPLICATIONS
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| 2013-02-01 | |
| Volume | 25Issue:1Pages:012003/1-012003/6 |
| ISSN | 1042-346X |
| Abstract | 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. |
| Keyword | Laser Dispersed Alloying Fatigue Resistance Residual Stress Ductile Cast Iron |
| Subject Area | 固体力学 ; 疲劳与断裂力学 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000320189600003 |
| Funding Organization | Chinese Postdoctoral Science Fund [20070410522]; Ministry of Science and Technology of the P. R. China [2009BAG12A01-B10-2] |
| Department | MAMYAG激光毛化技术 |
| Classification | Q3 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46873 |
| Collection | 先进制造工艺力学实验室 |
| Corresponding Author | Li, ZY (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| Recommended Citation 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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