Vapor-induced flow and its impact on powder entrainment in laser powder bed fusion
文献类型：期刊论文
| 作者 | Li ZY(李志永); Yu G(虞钢) ; He XL(何秀丽); Gan, Zhengtao; Liu, WingKam
|
| 刊名 | MATERIALS TODAY COMMUNICATIONS
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 36页码:106669 |
| 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 |
| 英文摘要 | 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. |
| 分类号 | 二类 |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001042909400001 |
| 资助机构 | National Natural Science Foundation of China [12202448] ; Chinese Scholarship Council (CSC) ; US NSF [CMMI-1934367] |
| 其他责任者 | 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. |
| 源URL | [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.{Gan, Zhengtao} Univ Texas El Paso, Dept Aerosp & Mech Engn, El Paso, TX 79968 USA 2.{Li, Zhiyong} Northwestern Univ, Dept Mech Engn, Evanston, IL 60201 USA 3.{Li, Zhiyong, Yu, Gang, He, Xiuli} Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 4.{Yu, Gang} Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 5.{Li, Zhiyong} Cranfield Univ, Welding & Addit Mfg Ctr, Cranfield MK43 0AL, Beds, England 6.{Yu, Gang, He, Xiuli} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 7.{Gan, Zhengtao, Liu, Wing Kam} 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. |
入库方式： OAI收割
来源：力学研究所
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