Cost-Aware Design and Fabrication of New Support Structures in Laser Powder Bed Fusion: Microstructure and Metallurgical Properties

This study investigates the effect of support structures on the properties of Inconel 718 (i.e., IN718) parts produced by the laser powder bed fusion (LPBF) additive manufacturing process. Specifically, the effects of support structure shape (i.e., pin-type, angled-type, cone-type) and geometry (i.e...

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Autores principales:	Bharath Bhushan Ravichander, Sourabh Thakare, Aditya Ganesh-Ram, Behzad Farhang, Manjunath Hanumantha, Yiran Yang, Narges Shayesteh Moghaddam, Amirhesam Amerinatanzi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	laser powder bed fusion Inconel 718 support structure Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/b647d1ab0e884751ac2156f6668f3945
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spelling	oai:doaj.org-article:b647d1ab0e884751ac2156f6668f39452021-11-11T15:11:37ZCost-Aware Design and Fabrication of New Support Structures in Laser Powder Bed Fusion: Microstructure and Metallurgical Properties10.3390/app1121101272076-3417https://doaj.org/article/b647d1ab0e884751ac2156f6668f39452021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10127https://doaj.org/toc/2076-3417This study investigates the effect of support structures on the properties of Inconel 718 (i.e., IN718) parts produced by the laser powder bed fusion (LPBF) additive manufacturing process. Specifically, the effects of support structure shape (i.e., pin-type, angled-type, cone-type) and geometry (i.e., support wall thickness, and gap) on their composition, hardness, microstructure, and material/time consumption are investigated and compared to the conventionally fabricated Inconel 718. From the microstructural analysis, the deepest melt pools appeared to be formed in the sample fabricated on top of the pin-type support structure having a relatively low wall thickness. The XRD results conveyed that a proper selection of geometrical variables for designing support structure results in elevated levels of the strengthening phases of IN718. The sample fabricated on top of the pin-type support structure showed the highest Vickers hardness value of 460.5 HV, which was even higher than what was reported for the heat-treated wrought Inconel 718 (355–385 HV). Moreover, for the thinner support wall thickness, an improvement in the hardness value of the fabricated samples was observed. This study urges a reconsideration of the common approach of selecting supports for additive manufacturing of samples when a higher quality of the as-fabricated parts is desired.Bharath Bhushan RavichanderSourabh ThakareAditya Ganesh-RamBehzad FarhangManjunath HanumanthaYiran YangNarges Shayesteh MoghaddamAmirhesam AmerinatanziMDPI AGarticlelaser powder bed fusionInconel 718support structureTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10127, p 10127 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	laser powder bed fusion Inconel 718 support structure Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	laser powder bed fusion Inconel 718 support structure Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Bharath Bhushan Ravichander Sourabh Thakare Aditya Ganesh-Ram Behzad Farhang Manjunath Hanumantha Yiran Yang Narges Shayesteh Moghaddam Amirhesam Amerinatanzi Cost-Aware Design and Fabrication of New Support Structures in Laser Powder Bed Fusion: Microstructure and Metallurgical Properties
description	This study investigates the effect of support structures on the properties of Inconel 718 (i.e., IN718) parts produced by the laser powder bed fusion (LPBF) additive manufacturing process. Specifically, the effects of support structure shape (i.e., pin-type, angled-type, cone-type) and geometry (i.e., support wall thickness, and gap) on their composition, hardness, microstructure, and material/time consumption are investigated and compared to the conventionally fabricated Inconel 718. From the microstructural analysis, the deepest melt pools appeared to be formed in the sample fabricated on top of the pin-type support structure having a relatively low wall thickness. The XRD results conveyed that a proper selection of geometrical variables for designing support structure results in elevated levels of the strengthening phases of IN718. The sample fabricated on top of the pin-type support structure showed the highest Vickers hardness value of 460.5 HV, which was even higher than what was reported for the heat-treated wrought Inconel 718 (355–385 HV). Moreover, for the thinner support wall thickness, an improvement in the hardness value of the fabricated samples was observed. This study urges a reconsideration of the common approach of selecting supports for additive manufacturing of samples when a higher quality of the as-fabricated parts is desired.
format	article
author	Bharath Bhushan Ravichander Sourabh Thakare Aditya Ganesh-Ram Behzad Farhang Manjunath Hanumantha Yiran Yang Narges Shayesteh Moghaddam Amirhesam Amerinatanzi
author_facet	Bharath Bhushan Ravichander Sourabh Thakare Aditya Ganesh-Ram Behzad Farhang Manjunath Hanumantha Yiran Yang Narges Shayesteh Moghaddam Amirhesam Amerinatanzi
author_sort	Bharath Bhushan Ravichander
title	Cost-Aware Design and Fabrication of New Support Structures in Laser Powder Bed Fusion: Microstructure and Metallurgical Properties
title_short	Cost-Aware Design and Fabrication of New Support Structures in Laser Powder Bed Fusion: Microstructure and Metallurgical Properties
title_full	Cost-Aware Design and Fabrication of New Support Structures in Laser Powder Bed Fusion: Microstructure and Metallurgical Properties
title_fullStr	Cost-Aware Design and Fabrication of New Support Structures in Laser Powder Bed Fusion: Microstructure and Metallurgical Properties
title_full_unstemmed	Cost-Aware Design and Fabrication of New Support Structures in Laser Powder Bed Fusion: Microstructure and Metallurgical Properties
title_sort	cost-aware design and fabrication of new support structures in laser powder bed fusion: microstructure and metallurgical properties
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b647d1ab0e884751ac2156f6668f3945
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Cost-Aware Design and Fabrication of New Support Structures in Laser Powder Bed Fusion: Microstructure and Metallurgical Properties

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