Spatter reduction by multi-beam illumination in laser powder-bed fusion

Modulation of laser radiation is a promising approach to increase the process speed in laser powder-bed fusion. However, with an increased buildup rate, the preservation of product quality must be guaranteed. For this purpose, we investigated spatter generation with single-beam and multi-beam distri...

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Autores principales:	Marcel Slodczyk, Alexander Ilin, Thomas Kiedrowski, Thomas Bareth, Vasily Ploshikhin
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Laser powder-bed fusion Multi-beams Process monitoring Spatters Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/efdd1667061643ef9dc9a54db8912fbd
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spelling	oai:doaj.org-article:efdd1667061643ef9dc9a54db8912fbd2021-11-10T04:17:28ZSpatter reduction by multi-beam illumination in laser powder-bed fusion0264-127510.1016/j.matdes.2021.110206https://doaj.org/article/efdd1667061643ef9dc9a54db8912fbd2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521007619https://doaj.org/toc/0264-1275Modulation of laser radiation is a promising approach to increase the process speed in laser powder-bed fusion. However, with an increased buildup rate, the preservation of product quality must be guaranteed. For this purpose, we investigated spatter generation with single-beam and multi-beam distributions for single tracks and printed objects. The investigation with a coaxial high-speed camera to capture thermal radiation of spatters and an off-axis high-speed camera for a qualitative observation of the melt pool led to a better understanding of spatter generation. The results showed dependency of power and scan velocity on the number of spatters. Furthermore, we showed that the application of multi-beams preserves the number of spatters per track at higher applied power. Due to the wide melt pools and fewer required hatches, the total number of spatters in a generated part was significantly reduced. In addition, by means of high-speed recordings, it was shown that melt pools with high volume have a higher stability against impurities of the powder bed and spatters. Finally, the application of multi-beam illumination led to a higher buildup rate with reduced spatter particles.Marcel SlodczykAlexander IlinThomas KiedrowskiThomas BarethVasily PloshikhinElsevierarticleLaser powder-bed fusionMulti-beamsProcess monitoringSpattersMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110206- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Laser powder-bed fusion Multi-beams Process monitoring Spatters Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Laser powder-bed fusion Multi-beams Process monitoring Spatters Materials of engineering and construction. Mechanics of materials TA401-492 Marcel Slodczyk Alexander Ilin Thomas Kiedrowski Thomas Bareth Vasily Ploshikhin Spatter reduction by multi-beam illumination in laser powder-bed fusion
description	Modulation of laser radiation is a promising approach to increase the process speed in laser powder-bed fusion. However, with an increased buildup rate, the preservation of product quality must be guaranteed. For this purpose, we investigated spatter generation with single-beam and multi-beam distributions for single tracks and printed objects. The investigation with a coaxial high-speed camera to capture thermal radiation of spatters and an off-axis high-speed camera for a qualitative observation of the melt pool led to a better understanding of spatter generation. The results showed dependency of power and scan velocity on the number of spatters. Furthermore, we showed that the application of multi-beams preserves the number of spatters per track at higher applied power. Due to the wide melt pools and fewer required hatches, the total number of spatters in a generated part was significantly reduced. In addition, by means of high-speed recordings, it was shown that melt pools with high volume have a higher stability against impurities of the powder bed and spatters. Finally, the application of multi-beam illumination led to a higher buildup rate with reduced spatter particles.
format	article
author	Marcel Slodczyk Alexander Ilin Thomas Kiedrowski Thomas Bareth Vasily Ploshikhin
author_facet	Marcel Slodczyk Alexander Ilin Thomas Kiedrowski Thomas Bareth Vasily Ploshikhin
author_sort	Marcel Slodczyk
title	Spatter reduction by multi-beam illumination in laser powder-bed fusion
title_short	Spatter reduction by multi-beam illumination in laser powder-bed fusion
title_full	Spatter reduction by multi-beam illumination in laser powder-bed fusion
title_fullStr	Spatter reduction by multi-beam illumination in laser powder-bed fusion
title_full_unstemmed	Spatter reduction by multi-beam illumination in laser powder-bed fusion
title_sort	spatter reduction by multi-beam illumination in laser powder-bed fusion
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/efdd1667061643ef9dc9a54db8912fbd
work_keys_str_mv	AT marcelslodczyk spatterreductionbymultibeamilluminationinlaserpowderbedfusion AT alexanderilin spatterreductionbymultibeamilluminationinlaserpowderbedfusion AT thomaskiedrowski spatterreductionbymultibeamilluminationinlaserpowderbedfusion AT thomasbareth spatterreductionbymultibeamilluminationinlaserpowderbedfusion AT vasilyploshikhin spatterreductionbymultibeamilluminationinlaserpowderbedfusion
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Spatter reduction by multi-beam illumination in laser powder-bed fusion

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