Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing

Cobalt superalloys such as Tribaloys are widely used in environments that involve high temperatures, corrosion, and wear degradation. Additive manufacturing (AM) processes have been investigated for fabricating Co-based alloys due to design flexibility and efficient materials usage. AM processes are...

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Autores principales:	Beytullah Aydogan, Himanshu Sahasrabudhe
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	additive manufacturing co-based superalloys multi-material structures microstructure phase characterization Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/ca77399f723742738c893d9cea40b3d7
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spelling	oai:doaj.org-article:ca77399f723742738c893d9cea40b3d72021-11-25T18:21:27ZEnabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing10.3390/met111117172075-4701https://doaj.org/article/ca77399f723742738c893d9cea40b3d72021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1717https://doaj.org/toc/2075-4701Cobalt superalloys such as Tribaloys are widely used in environments that involve high temperatures, corrosion, and wear degradation. Additive manufacturing (AM) processes have been investigated for fabricating Co-based alloys due to design flexibility and efficient materials usage. AM processes are suitable for reducing the manufacturing steps and subsequently reducing manufacturing costs by incorporating multi-materials. Laser directed energy deposition (laser DED) is a suitable AM process for fabricating Co-based alloys. T800 is one of the commercially available Tribaloys that is strengthened through Laves phases and of interest to diverse engineering fields. However, the high content of the Laves phase makes the alloy prone to brittle fracture. In this study, a Ni-20%Cr alloy was used to improve the fabricability of the T800 alloy via laser DED. Different mixture compositions (20%, 30%, 40% NiCr by weight) were investigated. The multi-material T800 + NiCr alloys were heat treated at two different temperatures. These alloy chemistries were characterized for their microstructural, phase, and mechanical properties in the as-fabricated and heat-treated conditions. SEM and XRD characterization indicated the stabilization of ductile phases and homogenization of the Laves phases after laser DED fabrication and heat treatment. In conclusion, the NiCr addition improved the fabricability and structural integrity of the T800 alloy.Beytullah AydoganHimanshu SahasrabudheMDPI AGarticleadditive manufacturingco-based superalloysmulti-material structuresmicrostructurephase characterizationMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1717, p 1717 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	additive manufacturing co-based superalloys multi-material structures microstructure phase characterization Mining engineering. Metallurgy TN1-997
spellingShingle	additive manufacturing co-based superalloys multi-material structures microstructure phase characterization Mining engineering. Metallurgy TN1-997 Beytullah Aydogan Himanshu Sahasrabudhe Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing
description	Cobalt superalloys such as Tribaloys are widely used in environments that involve high temperatures, corrosion, and wear degradation. Additive manufacturing (AM) processes have been investigated for fabricating Co-based alloys due to design flexibility and efficient materials usage. AM processes are suitable for reducing the manufacturing steps and subsequently reducing manufacturing costs by incorporating multi-materials. Laser directed energy deposition (laser DED) is a suitable AM process for fabricating Co-based alloys. T800 is one of the commercially available Tribaloys that is strengthened through Laves phases and of interest to diverse engineering fields. However, the high content of the Laves phase makes the alloy prone to brittle fracture. In this study, a Ni-20%Cr alloy was used to improve the fabricability of the T800 alloy via laser DED. Different mixture compositions (20%, 30%, 40% NiCr by weight) were investigated. The multi-material T800 + NiCr alloys were heat treated at two different temperatures. These alloy chemistries were characterized for their microstructural, phase, and mechanical properties in the as-fabricated and heat-treated conditions. SEM and XRD characterization indicated the stabilization of ductile phases and homogenization of the Laves phases after laser DED fabrication and heat treatment. In conclusion, the NiCr addition improved the fabricability and structural integrity of the T800 alloy.
format	article
author	Beytullah Aydogan Himanshu Sahasrabudhe
author_facet	Beytullah Aydogan Himanshu Sahasrabudhe
author_sort	Beytullah Aydogan
title	Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing
title_short	Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing
title_full	Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing
title_fullStr	Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing
title_full_unstemmed	Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing
title_sort	enabling multi-material structures of co-based superalloy using laser directed energy deposition additive manufacturing
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ca77399f723742738c893d9cea40b3d7
work_keys_str_mv	AT beytullahaydogan enablingmultimaterialstructuresofcobasedsuperalloyusinglaserdirectedenergydepositionadditivemanufacturing AT himanshusahasrabudhe enablingmultimaterialstructuresofcobasedsuperalloyusinglaserdirectedenergydepositionadditivemanufacturing
_version_	1718411285350055936

Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing

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