Process-Structure-Property Relationships for 316L Stainless Steel Fabricated by Additive Manufacturing and Its Implication for Component Engineering

Yang, N; Yee, J; Zheng, B; Gaiser, K; Reynolds, T; Clemon, L; Lu, WY; Schoenung, JM; Lavernia, EJ

Process-Structure-Property Relationships for 316L Stainless Steel Fabricated by Additive Manufacturing and Its Implication for Component Engineering

Yang, N Yee, J Zheng, B Gaiser, K Reynolds, T Clemon, L

Lu, WY Schoenung, JM Lavernia, EJ

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Publication Type:: Journal Article
Citation:: Journal of Thermal Spray Technology, 2017, 26 (4), pp. 610 - 626
Issue Date:: 2017-04-01

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Field	Value	Language
dc.contributor.author	Yang, N	en_US
dc.contributor.author	Yee, J	en_US
dc.contributor.author	Zheng, B	en_US
dc.contributor.author	Gaiser, K	en_US
dc.contributor.author	Reynolds, T	en_US
dc.contributor.author	Clemon, L https://orcid.org/0000-0003-3808-7749	en_US
dc.contributor.author	Lu, WY	en_US
dc.contributor.author	Schoenung, JM	en_US
dc.contributor.author	Lavernia, EJ	en_US
dc.date.issued	2017-04-01	en_US
dc.identifier.citation	Journal of Thermal Spray Technology, 2017, 26 (4), pp. 610 - 626	en_US
dc.identifier.issn	1059-9630	en_US
dc.identifier.uri	http://hdl.handle.net/10453/125395
dc.description.abstract	© 2016, ASM International. We investigate the process-structure-property relationships for 316L stainless steel prototyping utilizing 3-D laser engineered net shaping (LENS), a commercial direct energy deposition additive manufacturing process. The study concluded that the resultant physical metallurgy of 3-D LENS 316L prototypes is dictated by the interactive metallurgical reactions, during instantaneous powder feeding/melting, molten metal flow and liquid metal solidification. The study also showed 3-D LENS manufacturing is capable of building high strength and ductile 316L prototypes due to its fine cellular spacing from fast solidification cooling, and the well-fused epitaxial interfaces at metal flow trails and interpass boundaries. However, without further LENS process control and optimization, the deposits are vulnerable to localized hardness variation attributed to heterogeneous microstructure, i.e., the interpass heat-affected zone (HAZ) from repetitive thermal heating during successive layer depositions. Most significantly, the current deposits exhibit anisotropic tensile behavior, i.e., lower strain and/or premature interpass delamination parallel to build direction (axial). This anisotropic behavior is attributed to the presence of interpass HAZ, which coexists with flying feedstock inclusions and porosity from incomplete molten metal fusion. The current observations and findings contribute to the scientific basis for future process control and optimization necessary for material property control and defect mitigation.	en_US
dc.relation.ispartof	Journal of Thermal Spray Technology	en_US
dc.relation.isbasedon	10.1007/s11666-016-0480-y	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Materials	en_US
dc.title	Process-Structure-Property Relationships for 316L Stainless Steel Fabricated by Additive Manufacturing and Its Implication for Component Engineering	en_US
dc.type	Journal Article
utslib.citation.volume	4	en_US
utslib.citation.volume	26	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0913 Mechanical Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	closed_access	*
pubs.issue	4	en_US
pubs.publication-status	Published	en_US
pubs.volume	26	en_US

Abstract:

© 2016, ASM International. We investigate the process-structure-property relationships for 316L stainless steel prototyping utilizing 3-D laser engineered net shaping (LENS), a commercial direct energy deposition additive manufacturing process. The study concluded that the resultant physical metallurgy of 3-D LENS 316L prototypes is dictated by the interactive metallurgical reactions, during instantaneous powder feeding/melting, molten metal flow and liquid metal solidification. The study also showed 3-D LENS manufacturing is capable of building high strength and ductile 316L prototypes due to its fine cellular spacing from fast solidification cooling, and the well-fused epitaxial interfaces at metal flow trails and interpass boundaries. However, without further LENS process control and optimization, the deposits are vulnerable to localized hardness variation attributed to heterogeneous microstructure, i.e., the interpass heat-affected zone (HAZ) from repetitive thermal heating during successive layer depositions. Most significantly, the current deposits exhibit anisotropic tensile behavior, i.e., lower strain and/or premature interpass delamination parallel to build direction (axial). This anisotropic behavior is attributed to the presence of interpass HAZ, which coexists with flying feedstock inclusions and porosity from incomplete molten metal fusion. The current observations and findings contribute to the scientific basis for future process control and optimization necessary for material property control and defect mitigation.

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http://hdl.handle.net/10453/125395