Effect of Process Parameters and Layer Thickness on the Quality and Performance of Ti-6Al-4V Fabricated by Selective Laser Melting

To improve the quality of thick powder bed and realize the matching of thick powder bed and thin powder bed in the later stage, the influence of process parameters for the single-track, multi-layer fabrication, relative density, surface quality, defect, remelting, and boundary optimization performan...

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Autores principales:	Yanlong Jing, Peng Wang, Xiaoling Yan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	selective laser melting Ti-6Al-4V forming quality layer thickness Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/d3d4df4599d94e36967a3d036a9b16a9
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spelling	oai:doaj.org-article:d3d4df4599d94e36967a3d036a9b16a92021-11-25T17:16:01ZEffect of Process Parameters and Layer Thickness on the Quality and Performance of Ti-6Al-4V Fabricated by Selective Laser Melting10.3390/coatings111113232079-6412https://doaj.org/article/d3d4df4599d94e36967a3d036a9b16a92021-10-01T00:00:00Zhttps://www.mdpi.com/2079-6412/11/11/1323https://doaj.org/toc/2079-6412To improve the quality of thick powder bed and realize the matching of thick powder bed and thin powder bed in the later stage, the influence of process parameters for the single-track, multi-layer fabrication, relative density, surface quality, defect, remelting, and boundary optimization performance of different layer thicknesses of Ti-6Al-4V fabricated by selective laser melting were investigated. It is more conducive to the stable forming of single-track when the point distance is half the diameter of the laser beam, and the exposure time is appropriately extended. The thin powder bed needs the corresponding point distance and exposure time under the laser power of 280–380 W to obtain high-density specimens. The thick powder bed needs to be able to ensure the formation of high-quality specimens under the smaller point distance and longer exposure time under higher laser power of 380 W. Both thick powder bed and thin powder bed will cause un-melted defects between molten pools, spheroidization defects caused by splashing, and microporous defects. The remelting process can significantly improve the surface quality of the formed specimen, but the surface quality of the thick powder bed is worse than that of the thin powder bed. The boundary quality of thick powder bed is worse than that of thin powder bed, and the boundary shape has a greater influence on the quality of the SLM forming boundary. Different strategies should be adopted to form the boundary of different shapes. Increasing the boundary count and increasing the laser power are more conducive to the improvement of boundary quality.Yanlong JingPeng WangXiaoling YanMDPI AGarticleselective laser meltingTi-6Al-4Vforming qualitylayer thicknessEngineering (General). Civil engineering (General)TA1-2040ENCoatings, Vol 11, Iss 1323, p 1323 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	selective laser melting Ti-6Al-4V forming quality layer thickness Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	selective laser melting Ti-6Al-4V forming quality layer thickness Engineering (General). Civil engineering (General) TA1-2040 Yanlong Jing Peng Wang Xiaoling Yan Effect of Process Parameters and Layer Thickness on the Quality and Performance of Ti-6Al-4V Fabricated by Selective Laser Melting
description	To improve the quality of thick powder bed and realize the matching of thick powder bed and thin powder bed in the later stage, the influence of process parameters for the single-track, multi-layer fabrication, relative density, surface quality, defect, remelting, and boundary optimization performance of different layer thicknesses of Ti-6Al-4V fabricated by selective laser melting were investigated. It is more conducive to the stable forming of single-track when the point distance is half the diameter of the laser beam, and the exposure time is appropriately extended. The thin powder bed needs the corresponding point distance and exposure time under the laser power of 280–380 W to obtain high-density specimens. The thick powder bed needs to be able to ensure the formation of high-quality specimens under the smaller point distance and longer exposure time under higher laser power of 380 W. Both thick powder bed and thin powder bed will cause un-melted defects between molten pools, spheroidization defects caused by splashing, and microporous defects. The remelting process can significantly improve the surface quality of the formed specimen, but the surface quality of the thick powder bed is worse than that of the thin powder bed. The boundary quality of thick powder bed is worse than that of thin powder bed, and the boundary shape has a greater influence on the quality of the SLM forming boundary. Different strategies should be adopted to form the boundary of different shapes. Increasing the boundary count and increasing the laser power are more conducive to the improvement of boundary quality.
format	article
author	Yanlong Jing Peng Wang Xiaoling Yan
author_facet	Yanlong Jing Peng Wang Xiaoling Yan
author_sort	Yanlong Jing
title	Effect of Process Parameters and Layer Thickness on the Quality and Performance of Ti-6Al-4V Fabricated by Selective Laser Melting
title_short	Effect of Process Parameters and Layer Thickness on the Quality and Performance of Ti-6Al-4V Fabricated by Selective Laser Melting
title_full	Effect of Process Parameters and Layer Thickness on the Quality and Performance of Ti-6Al-4V Fabricated by Selective Laser Melting
title_fullStr	Effect of Process Parameters and Layer Thickness on the Quality and Performance of Ti-6Al-4V Fabricated by Selective Laser Melting
title_full_unstemmed	Effect of Process Parameters and Layer Thickness on the Quality and Performance of Ti-6Al-4V Fabricated by Selective Laser Melting
title_sort	effect of process parameters and layer thickness on the quality and performance of ti-6al-4v fabricated by selective laser melting
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d3d4df4599d94e36967a3d036a9b16a9
work_keys_str_mv	AT yanlongjing effectofprocessparametersandlayerthicknessonthequalityandperformanceofti6al4vfabricatedbyselectivelasermelting AT pengwang effectofprocessparametersandlayerthicknessonthequalityandperformanceofti6al4vfabricatedbyselectivelasermelting AT xiaolingyan effectofprocessparametersandlayerthicknessonthequalityandperformanceofti6al4vfabricatedbyselectivelasermelting
_version_	1718412560046227456

Effect of Process Parameters and Layer Thickness on the Quality and Performance of Ti-6Al-4V Fabricated by Selective Laser Melting

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