Hot Crack Formation Mechanism and Inhibition of a Novel Cobalt-Based Alloy Coating during Laser Cladding
文献类型：期刊论文
| 作者 | Yang, Pengfei1; Lu, Nannan2; Liang, Jingjing2; Guo, Yimo2; Zhang, Guangrui2; Song, Xiu1; Zhou, Yizhou2; Sun, Xiaofeng2; Li, Jinguo2 |
| 刊名 | MATERIALS
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 17期号:16页码:19 |
| 关键词 | novel cobalt-based alloy coating laser cladding process optimization hot cracking mechanism crack inhibition |
| DOI | 10.3390/ma17163914 |
| 通讯作者 | Lu, Nannan(nnlu@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn) |
| 英文摘要 | Laser cladding provides advanced surface treatment capabilities for enhancing the properties of components. However, its effectiveness is often challenged by the formation of hot cracks during the cladding process. This study focuses on the formation mechanism and inhibition of hot cracks in a novel cobalt-based alloy (K688) coating applied to 304LN stainless steel via laser cladding. The results indicate that hot crack formation is influenced by liquid film stability, the stress concentration, and precipitation phases. Most hot cracks were found at 25 degrees-45 degrees high-angle grain boundaries (HAGBs) due to the high energy of these grain boundaries, which stabilize the liquid film. A flat-top beam, compared to a Gaussian beam, creates a melt pool with a lower temperature gradient and more mitigatory fluid flow, reducing thermal stresses within the coating and the fraction of crack-sensitive, high-angle grain boundaries (S-HAGBs). Finally, crack formation was significantly inhibited by utilizing a flat-top laser beam to optimize the process parameters. These findings provide a technical foundation for achieving high-quality laser cladding of dissimilar materials, offering insights into optimizing process parameters to prevent hot crack formation. |
| 资助项目 | China Postdoctoral Science Foundation ; Natural Science Foundation of Liaoning Province[2022-MS-113] ; Fundamental Research Funds for the Central Universities, China[N2302005] ; [2022M723211] |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001305771600001 |
| 出版者 | MDPI |
| 资助机构 | China Postdoctoral Science Foundation ; Natural Science Foundation of Liaoning Province ; Fundamental Research Funds for the Central Universities, China |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Lu, Nannan; Li, Jinguo |
| 作者单位 | 1.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Pengfei,Lu, Nannan,Liang, Jingjing,et al. Hot Crack Formation Mechanism and Inhibition of a Novel Cobalt-Based Alloy Coating during Laser Cladding[J]. MATERIALS,2024,17(16):19. |
| APA | Yang, Pengfei.,Lu, Nannan.,Liang, Jingjing.,Guo, Yimo.,Zhang, Guangrui.,...&Li, Jinguo.(2024).Hot Crack Formation Mechanism and Inhibition of a Novel Cobalt-Based Alloy Coating during Laser Cladding.MATERIALS,17(16),19. |
| MLA | Yang, Pengfei,et al."Hot Crack Formation Mechanism and Inhibition of a Novel Cobalt-Based Alloy Coating during Laser Cladding".MATERIALS 17.16(2024):19. |
入库方式： OAI收割
来源：金属研究所
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