Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L

Laser powder bed fusion (LPBF) has a wide range of uses in high-tech industries, including the aerospace and biomedical fields. For LPBF, the flow of molten metal is crucial; until now, however, the flow in the melt pool has not been described thoroughly in 3D. Here, we provide full-field mapping an...

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Autores principales:	Asif Ur Rehman, Fatih Pitir, Metin Uymaz Salamci
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	multi-physics model LPBF process multiple reflection selective laser melting selective laser sintering Marangoni flow Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/040da9d0bf1046faabbc8c40f3df4261
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id	oai:doaj.org-article:040da9d0bf1046faabbc8c40f3df4261
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spelling	oai:doaj.org-article:040da9d0bf1046faabbc8c40f3df42612021-11-11T17:50:44ZFull-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L10.3390/ma142162641996-1944https://doaj.org/article/040da9d0bf1046faabbc8c40f3df42612021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6264https://doaj.org/toc/1996-1944Laser powder bed fusion (LPBF) has a wide range of uses in high-tech industries, including the aerospace and biomedical fields. For LPBF, the flow of molten metal is crucial; until now, however, the flow in the melt pool has not been described thoroughly in 3D. Here, we provide full-field mapping and flow measurement of melt pool dynamics in laser powder bed fusion, through a high-fidelity numerical model using the finite volume method. The influence of Marangoni flow, evaporation, as well as recoil pressure have been included in the model. Single-track experiments were conducted for validation. The temperature profiles at different power and speed parameters were simulated, and results were compared with experimental temperature recordings. The flow dynamics in a single track were exposed. The numerical and experimental findings revealed that even in the same melting track, the melt pool’s height and width can vary due to the strong Marangoni force. The model showed that the variation in density and volume for the same melting track was one of the critical reasons for defects. The acquired findings shed important light on laser additive manufacturing processes and pave the way for the development of robust, computational models with a high degree of reliability.Asif Ur RehmanFatih PitirMetin Uymaz SalamciMDPI AGarticlemulti-physics modelLPBF processmultiple reflectionselective laser meltingselective laser sinteringMarangoni flowTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6264, p 6264 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	multi-physics model LPBF process multiple reflection selective laser melting selective laser sintering Marangoni flow Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	multi-physics model LPBF process multiple reflection selective laser melting selective laser sintering Marangoni flow Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Asif Ur Rehman Fatih Pitir Metin Uymaz Salamci Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L
description	Laser powder bed fusion (LPBF) has a wide range of uses in high-tech industries, including the aerospace and biomedical fields. For LPBF, the flow of molten metal is crucial; until now, however, the flow in the melt pool has not been described thoroughly in 3D. Here, we provide full-field mapping and flow measurement of melt pool dynamics in laser powder bed fusion, through a high-fidelity numerical model using the finite volume method. The influence of Marangoni flow, evaporation, as well as recoil pressure have been included in the model. Single-track experiments were conducted for validation. The temperature profiles at different power and speed parameters were simulated, and results were compared with experimental temperature recordings. The flow dynamics in a single track were exposed. The numerical and experimental findings revealed that even in the same melting track, the melt pool’s height and width can vary due to the strong Marangoni force. The model showed that the variation in density and volume for the same melting track was one of the critical reasons for defects. The acquired findings shed important light on laser additive manufacturing processes and pave the way for the development of robust, computational models with a high degree of reliability.
format	article
author	Asif Ur Rehman Fatih Pitir Metin Uymaz Salamci
author_facet	Asif Ur Rehman Fatih Pitir Metin Uymaz Salamci
author_sort	Asif Ur Rehman
title	Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L
title_short	Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L
title_full	Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L
title_fullStr	Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L
title_full_unstemmed	Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L
title_sort	full-field mapping and flow quantification of melt pool dynamics in laser powder bed fusion of ss316l
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/040da9d0bf1046faabbc8c40f3df4261
work_keys_str_mv	AT asifurrehman fullfieldmappingandflowquantificationofmeltpooldynamicsinlaserpowderbedfusionofss316l AT fatihpitir fullfieldmappingandflowquantificationofmeltpooldynamicsinlaserpowderbedfusionofss316l AT metinuymazsalamci fullfieldmappingandflowquantificationofmeltpooldynamicsinlaserpowderbedfusionofss316l
_version_	1718431981469958144

Full-Field Mapping and Flow Quantification of Melt Pool Dynamics in Laser Powder Bed Fusion of SS316L

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