Vapor-induced flow and its impact on powder entrainment in laser powder bed fusion

doi:10.1016/j.mtcomm.2023.106669

IMECH-IR > 宽域飞行工程科学与应用中心

	Vapor-induced flow and its impact on powder entrainment in laser powder bed fusion
	Li ZY(李志永); Yu G(虞钢); He XL(何秀丽); Gan, Zhengtao ; Liu, WingKam
发表期刊	MATERIALS TODAY COMMUNICATIONS
	2023-08-01
卷号	36 页码:106669
摘要	A 2D axisymmetric transient Thermal-Fluid-Evaporation model coupled with melt pool dynamics and gas kinetics is developed to study the formation mechanisms of vapor-induced flow and the resulting powder entrainment in powder bed fusion using laser beam (PBF-LB) for 316 L powders. The interactions between keyhole formation inside the melt pool, vapor plume flow, and vapor-induced shielding gas flow are investigated. Vapor plume flow results in powder spattering with much higher speed, while vapor-induced gas flow significantly contributes to powder denudation with lower speed. It is also reported that powder spattering is stronger in 1 atm argon than that in 1 atm helium because the drag force for spattering is 2.72 times larger in 1 atm argon, but powder denudation becomes greater in 1 atm helium as the ratio of drag force for denudation in 1 atm argon to that in 1 atm helium is only 0.582. Furthermore, the vapor plume results in more spatters with the decrease of ambient pressure from 1 atm to 0.05 atm in argon because the plume is diluted faster with a twofold wider plume head and the two times higher peak velocity as a result of the pressure drop-induced significant reduction of viscosity restriction. A larger divergency angle in 0.05 atm argon is also recorded at the same time for the weaker restriction and faster dilution. In combination with in-situ observations, the proposed model provides insights into the vapor-induced flow, and its impact on powder entrainment under different gas types and ambient pressures.
关键词	Numerical modeling Powder spattering and denudation 3D printing and additive manufacturing Vapor plume flow Vapor-induced gas flow
DOI	10.1016/j.mtcomm.2023.106669
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001042909400001
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
项目资助者	National Natural Science Foundation of China [12202448] ; Chinese Scholarship Council (CSC) ; US NSF [CMMI-1934367]
论文分区	二类
力学所作者排名	1
RpAuthor	He, XL (corresponding author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. ; Gan, ZT ; Liu, WK (corresponding author), Northwestern Univ, Dept Mech Engn, Evanston, IL 60201 USA.
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/92550
专题	宽域飞行工程科学与应用中心
作者单位	1.{Li, Zhiyong, Yu, Gang, He, Xiuli} Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.{Yu, Gang} Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 3.{Li, Zhiyong} Cranfield Univ, Welding & Addit Mfg Ctr, Cranfield MK43 0AL, Beds, England 4.{Yu, Gang, He, Xiuli} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 5.{Gan, Zhengtao, Liu, Wing Kam} Northwestern Univ, Dept Mech Engn, Evanston, IL 60201 USA 6.{Gan, Zhengtao} Univ Texas El Paso, Dept Aerosp & Mech Engn, El Paso, TX 79968 USA 7.{Li, Zhiyong} Northwestern Univ, Dept Mech Engn, Evanston, IL 60201 USA
推荐引用方式 GB/T 7714	Li ZY,Yu G,He XL,et al. Vapor-induced flow and its impact on powder entrainment in laser powder bed fusion[J]. MATERIALS TODAY COMMUNICATIONS,2023,36:106669.
APA	李志永,虞钢,何秀丽,Gan, Zhengtao,&Liu, WingKam.(2023).Vapor-induced flow and its impact on powder entrainment in laser powder bed fusion.MATERIALS TODAY COMMUNICATIONS,36,106669.
MLA	李志永,et al."Vapor-induced flow and its impact on powder entrainment in laser powder bed fusion".MATERIALS TODAY COMMUNICATIONS 36(2023):106669.

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