Sulfur-induced transitions of thermal behavior and flow dynamics in laser powder bed fusion of 316L powders

doi:10.1016/j.tsep.2023.102072

CORC > 力学研究所 > 中国科学院力学研究所 > 宽域飞行工程科学与应用中心

	Sulfur-induced transitions of thermal behavior and flow dynamics in laser powder bed fusion of 316L powders
	Li, Zhiyong 3,5; He, Xiuli 3,5; Li, Shaoxia 3,5; Kan, Xinfeng 2; Yin, Yanjun 1; Yu, Gang 3,4,5
刊名	THERMAL SCIENCE AND ENGINEERING PROGRESS
	2023-10-01
卷号	45 页码:21
关键词	Melt pool dynamics Thermal behavior Fluid flow Surface-active element Laser powder bed fusion 3D printing and additive manufacturing
ISSN号	2451-9049
DOI	10.1016/j.tsep.2023.102072
通讯作者	He, Xiuli(xlhe@imech.ac.cn) ; Yu, Gang(gyu@imech.ac.cn)
英文摘要	A three-dimensional (3D) powder-scale model is developed to analyze the melt pool dynamics in laser powder bed fusion (L-PBF) of 316L powders considering the transition of melt pool dynamics induced by sulfur element. In sulfur-free situation, thermal behavior and fluid flow are modeled involving 3D details. In sulfur-considered situation, sulfur-effect on melt pool dynamics is simulated with the surface tension described by the function of local temperature and the sulfur content. It is concluded that heat transfer is dominated by convection flow, and surface tension is the most important driving force. When the sulfur-effect is absent, surface tension increases from center to the periphery, inducing a centrally outward Marangoni convection. In the situation of 0.03% sulfur, surface tension first increases then decreases from center to the boundary, resulting in the novel flow pattern of combined outward-inward flow. Probing the underlying physical details induced by sulfur-effect, it makes melt pool dynamics more complex with more vortexes, and the sulfur-induced backward branch flow at the transverse view is benefit for the reduction of surface roughness. Furthermore, more vortexes, more branch flow, and more mixing positions of branch flow (MPBF) are observed in the sulfur-considered situation, which induces the increasing flow complexity, the drop of temperature gradient and driving force, as well as the decreasing flow intensity. Moreover, the variation of sulfur content leads to significant transitions of thermal behavior, driving force, and dynamic characteristics. Fundamental conclusions contribute significantly to the comprehensive understanding of the physical process in L-PBF of 316L powders.
资助项目	National Natural Science Foundation of China[12202448] ; Chinese Scholarship Council (CSC)
WOS关键词	FLUID-FLOW ; METALLIC COMPONENTS ; PHASE-CHANGE ; CONVECTION ; HEAT ; POROSITY ; DENUDATION ; TRANSPORT
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
语种	英语
WOS记录号	WOS:001106538900001
资助机构	National Natural Science Foundation of China ; Chinese Scholarship Council (CSC)
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93581]
专题	宽域飞行工程科学与应用中心
通讯作者	He, Xiuli; Yu, Gang
作者单位	1.Changzhou Inst Technol, Changzhou 213032, Jiangsu, Peoples R China 2.Jiangsu Univ Sci & Technol, Zhenjiang 212100, Jiangsu, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Univ Chinese Acad Sci, China Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhiyong,He, Xiuli,Li, Shaoxia,et al. Sulfur-induced transitions of thermal behavior and flow dynamics in laser powder bed fusion of 316L powders[J]. THERMAL SCIENCE AND ENGINEERING PROGRESS,2023,45:21.
APA	Li, Zhiyong,He, Xiuli,Li, Shaoxia,Kan, Xinfeng,Yin, Yanjun,&Yu, Gang.(2023).Sulfur-induced transitions of thermal behavior and flow dynamics in laser powder bed fusion of 316L powders.THERMAL SCIENCE AND ENGINEERING PROGRESS,45,21.
MLA	Li, Zhiyong,et al."Sulfur-induced transitions of thermal behavior and flow dynamics in laser powder bed fusion of 316L powders".THERMAL SCIENCE AND ENGINEERING PROGRESS 45(2023):21.