The Formation of Humps and Ripples During Selective Laser Melting of 316l Stainless Steel

doi:10.1007/s11837-019-03987-7

	The Formation of Humps and Ripples During Selective Laser Melting of 316l Stainless Steel
	Tang, Pingmei 2; Wang, Sen 1; Duan, Huamei 2; Long, Mujun 2; Li, Yandong 3; Fan, Shuqian 1; Chen, Dengfu 2
刊名	JOM
	2020-03-01
卷号	72 期号:3 页码:1128-1137
ISSN号	1047-4838
DOI	10.1007/s11837-019-03987-7
通讯作者	Tang, Pingmei(Tpingmei@163.com)
英文摘要	Humps and ripples are typical surface morphologies obtained in the selective laser melting processes and have an important influence on the surface quality of the fabricated parts. In this study, a three-dimensional powder-scale model is presented to investigate the molten behavior and the resulting hump and ripple formation processes. The results showed that a periodic separation of the molten pool and the associated solidification shrinkage of the molten liquid owing to the surface tension caused the periodic humps on the scan track at a low input energy density. Obtaining a continuous molten pool with an extended duration of the liquidus molten pool and a large flow intensity was conducive to alleviating the humps. Additionally, the molten pool had periodic oscillations due to the recoil pressure that occurred at high input energy densities. The periodic oscillation behavior was responsible for the periodic change of the flow direction of molten liquids at the rear of the molten pool, which caused the periodic formation of ripples during the printing process. Moreover, the surface morphology of the scan track and the dimensions of the molten pool were obtained experimentally. The results were in accordance with the calculated results, which verified the reliability of the model.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000515408600015
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10620]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Tang, Pingmei
作者单位	1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 2.Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China 3.Yangtze Normal Univ, Key Lab Extraordinary Bond Engn & Adv Mat Technol, Chongqing 408000, Peoples R China
推荐引用方式 GB/T 7714	Tang, Pingmei,Wang, Sen,Duan, Huamei,et al. The Formation of Humps and Ripples During Selective Laser Melting of 316l Stainless Steel[J]. JOM,2020,72(3):1128-1137.
APA	Tang, Pingmei.,Wang, Sen.,Duan, Huamei.,Long, Mujun.,Li, Yandong.,...&Chen, Dengfu.(2020).The Formation of Humps and Ripples During Selective Laser Melting of 316l Stainless Steel.JOM,72(3),1128-1137.
MLA	Tang, Pingmei,et al."The Formation of Humps and Ripples During Selective Laser Melting of 316l Stainless Steel".JOM 72.3(2020):1128-1137.