Size effect due to contour laser scanning in 316L stainless steel produced by laser powder bed fusion

In this work, effect of sample size on mechanical properties in the net-shaped 316 L alloys produced by laser powder bed fusion (LPBF) was studied. Tensile specimens with four different geometries, having the same total cross-sectional areas but with different tension beam widths of 0.75, 1.5, 3 and...

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Autores principales:	Jaehyun Yu, Dohyung Kim, Kyeongsik Ha, Jong Bae Jeon, Dong Joo Kim, Wookjin Lee
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Additive manufacturing 316L stainless steel Laser powder bed fusion Contour scanning Size effect Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/d6f0290107c64ebab15a2512d1db4b1b
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spelling	oai:doaj.org-article:d6f0290107c64ebab15a2512d1db4b1b2021-11-20T05:06:41ZSize effect due to contour laser scanning in 316L stainless steel produced by laser powder bed fusion2238-785410.1016/j.jmrt.2021.11.034https://doaj.org/article/d6f0290107c64ebab15a2512d1db4b1b2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421013132https://doaj.org/toc/2238-7854In this work, effect of sample size on mechanical properties in the net-shaped 316 L alloys produced by laser powder bed fusion (LPBF) was studied. Tensile specimens with four different geometries, having the same total cross-sectional areas but with different tension beam widths of 0.75, 1.5, 3 and 6 mm, were produced by the LPBF and subjected to the tests. The experimental results indicated that there is a strong influence of the sample size of the mechanical properties in the as-built state. The yield strength increased and the ductility decreased pronouncedly with decreasing the sample size. Fine grain structures near the surface of the net-shaped samples due to the additional laser contour scanning is believed to be responsible to the strong sample size effect. The experiments also revealed that the sample size effect can be effectively reduced with the annealing heat treatments. The local strength of the fine-grained area near the surface was quantitatively characterized by an inverse finite element analysis. The local strength near the surface was found stronger in the direction parallel to the LPBF building direction than in the direction parallel to the LPBF transverse direction, leading to more significant size effect along this direction.Jaehyun YuDohyung KimKyeongsik HaJong Bae JeonDong Joo KimWookjin LeeElsevierarticleAdditive manufacturing316L stainless steelLaser powder bed fusionContour scanningSize effectMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5554-5568 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Additive manufacturing 316L stainless steel Laser powder bed fusion Contour scanning Size effect Mining engineering. Metallurgy TN1-997
spellingShingle	Additive manufacturing 316L stainless steel Laser powder bed fusion Contour scanning Size effect Mining engineering. Metallurgy TN1-997 Jaehyun Yu Dohyung Kim Kyeongsik Ha Jong Bae Jeon Dong Joo Kim Wookjin Lee Size effect due to contour laser scanning in 316L stainless steel produced by laser powder bed fusion
description	In this work, effect of sample size on mechanical properties in the net-shaped 316 L alloys produced by laser powder bed fusion (LPBF) was studied. Tensile specimens with four different geometries, having the same total cross-sectional areas but with different tension beam widths of 0.75, 1.5, 3 and 6 mm, were produced by the LPBF and subjected to the tests. The experimental results indicated that there is a strong influence of the sample size of the mechanical properties in the as-built state. The yield strength increased and the ductility decreased pronouncedly with decreasing the sample size. Fine grain structures near the surface of the net-shaped samples due to the additional laser contour scanning is believed to be responsible to the strong sample size effect. The experiments also revealed that the sample size effect can be effectively reduced with the annealing heat treatments. The local strength of the fine-grained area near the surface was quantitatively characterized by an inverse finite element analysis. The local strength near the surface was found stronger in the direction parallel to the LPBF building direction than in the direction parallel to the LPBF transverse direction, leading to more significant size effect along this direction.
format	article
author	Jaehyun Yu Dohyung Kim Kyeongsik Ha Jong Bae Jeon Dong Joo Kim Wookjin Lee
author_facet	Jaehyun Yu Dohyung Kim Kyeongsik Ha Jong Bae Jeon Dong Joo Kim Wookjin Lee
author_sort	Jaehyun Yu
title	Size effect due to contour laser scanning in 316L stainless steel produced by laser powder bed fusion
title_short	Size effect due to contour laser scanning in 316L stainless steel produced by laser powder bed fusion
title_full	Size effect due to contour laser scanning in 316L stainless steel produced by laser powder bed fusion
title_fullStr	Size effect due to contour laser scanning in 316L stainless steel produced by laser powder bed fusion
title_full_unstemmed	Size effect due to contour laser scanning in 316L stainless steel produced by laser powder bed fusion
title_sort	size effect due to contour laser scanning in 316l stainless steel produced by laser powder bed fusion
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d6f0290107c64ebab15a2512d1db4b1b
work_keys_str_mv	AT jaehyunyu sizeeffectduetocontourlaserscanningin316lstainlesssteelproducedbylaserpowderbedfusion AT dohyungkim sizeeffectduetocontourlaserscanningin316lstainlesssteelproducedbylaserpowderbedfusion AT kyeongsikha sizeeffectduetocontourlaserscanningin316lstainlesssteelproducedbylaserpowderbedfusion AT jongbaejeon sizeeffectduetocontourlaserscanningin316lstainlesssteelproducedbylaserpowderbedfusion AT dongjookim sizeeffectduetocontourlaserscanningin316lstainlesssteelproducedbylaserpowderbedfusion AT wookjinlee sizeeffectduetocontourlaserscanningin316lstainlesssteelproducedbylaserpowderbedfusion
_version_	1718419626215342080

Size effect due to contour laser scanning in 316L stainless steel produced by laser powder bed fusion

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