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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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/11/1717 |
| _version_ | 1797509398192455680 |
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| author | Beytullah Aydogan Himanshu Sahasrabudhe |
| author_facet | Beytullah Aydogan Himanshu Sahasrabudhe |
| author_sort | Beytullah Aydogan |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:17:08Z |
| format | Article |
| id | doaj.art-ca77399f723742738c893d9cea40b3d7 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T05:17:08Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-ca77399f723742738c893d9cea40b3d72023-11-23T00:22:30ZengMDPI AGMetals2075-47012021-10-011111171710.3390/met11111717Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive ManufacturingBeytullah Aydogan0Himanshu Sahasrabudhe1Laboratory for Advanced Manufacturing Processes (LAMP), Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824, USALaboratory for Advanced Manufacturing Processes (LAMP), Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824, USACobalt 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.https://www.mdpi.com/2075-4701/11/11/1717additive manufacturingco-based superalloysmulti-material structuresmicrostructurephase characterization |
| spellingShingle | Beytullah Aydogan Himanshu Sahasrabudhe Enabling Multi-Material Structures of Co-Based Superalloy Using Laser Directed Energy Deposition Additive Manufacturing Metals additive manufacturing co-based superalloys multi-material structures microstructure phase characterization |
| title | 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_short | 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 |
| topic | additive manufacturing co-based superalloys multi-material structures microstructure phase characterization |
| url | https://www.mdpi.com/2075-4701/11/11/1717 |
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