Hot Crack Formation Mechanism and Inhibition of a Novel Cobalt-Based Alloy Coating during Laser Cladding

doi:10.3390/ma17163914

IMR OpenIR

	Hot Crack Formation Mechanism and Inhibition of a Novel Cobalt-Based Alloy Coating during Laser Cladding
	Yang, Pengfei 1; Lu, Nannan2 ; Liang, Jingjing 2; Guo, Yimo 2; Zhang, Guangrui 2; Song, Xiu 1; Zhou, Yizhou 2; Sun, Xiaofeng 2; Li, Jinguo 2
通讯作者	Lu, Nannan(nnlu@imr.ac.cn) ; Li, Jinguo(jgli@imr.ac.cn)
	2024-08-01
发表期刊	MATERIALS
卷号	17 期号:16 页码:19
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.
关键词	novel cobalt-based alloy coating laser cladding process optimization hot cracking mechanism crack inhibition
资助者	China Postdoctoral Science Foundation ; Natural Science Foundation of Liaoning Province ; Fundamental Research Funds for the Central Universities, China
DOI	10.3390/ma17163914
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001305771600001
出版者	MDPI
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/189739
专题	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.