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

Aydogan, Beytullah; Sahasrabudhe, Himanshu

doi:10.3390/met11111717

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

Abstract

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 integritymore » of the T800 alloy.« less

Authors:: Aydogan, Beytullah; Sahasrabudhe, Himanshu

Publication Date:: 2021-10-27

Sponsoring Org.:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

OSTI Identifier:: 1828082

Grant/Contract Number:: AR0001123

Resource Type:: Published Article

Journal Name:: Metals

Additional Journal Information:: Journal Name: Metals Journal Volume: 11 Journal Issue: 11; Journal ID: ISSN 2075-4701

Publisher:: MDPI AG

Country of Publication:: Switzerland

Language:: English

Citation Formats


                    Aydogan, Beytullah, and Sahasrabudhe, Himanshu. Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing.  Switzerland: N. p., 2021. 
Web.  doi:10.3390/met11111717.

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                    Aydogan, Beytullah, & Sahasrabudhe, Himanshu. Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing.  Switzerland.  https://doi.org/10.3390/met11111717

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                    Aydogan, Beytullah, and Sahasrabudhe, Himanshu. Wed .  
"Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing".  Switzerland.  https://doi.org/10.3390/met11111717.

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@article{osti_1828082,

  title        = {Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing},

  author       = {Aydogan, Beytullah and Sahasrabudhe, Himanshu},

  abstractNote = {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.},

  doi          = {10.3390/met11111717},

  journal      = {Metals},

  number       = 11,

  volume       = 11,

  place        = {Switzerland},

  year         = {2021},

  month        = {10}

}

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

Abstract

Citation Formats

Wear and corrosion performance of laser-clad low-carbon high-molybdenum Stellite alloys journal, November 2018

Additive manufacturing of Inconel 718 – Ti6Al4V bimetallic structures journal, August 2018

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Improvement of the oxidation resistance of Tribaloy T-800 alloy by the additions of yttrium and aluminium journal, March 2011

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