Effects of deposition sequence on microstructural evolution in additively manufactured Cu-Cr-Nb alloy / superalloy bimetallic structures
Although Cu-Cr-Nb alloys / superalloys bimetallic components for liquid rocket engine applications have been fabricated using additive manufacturing, a detailed understanding of their process-structure relation is currently lacking. To bridge this gap, GRCop-42 / Alloy 718 bimetallic structures were...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Additive Manufacturing Letters |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772369023000324 |
| _version_ | 1797800904914632704 |
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| author | A.D. Iams T.J. Lienert D.A. Otazu M. Ramoni |
| author_facet | A.D. Iams T.J. Lienert D.A. Otazu M. Ramoni |
| author_sort | A.D. Iams |
| collection | DOAJ |
| description | Although Cu-Cr-Nb alloys / superalloys bimetallic components for liquid rocket engine applications have been fabricated using additive manufacturing, a detailed understanding of their process-structure relation is currently lacking. To bridge this gap, GRCop-42 / Alloy 718 bimetallic structures were fabricated with two different deposition sequences, using powder feedstock with a laser-based directed energy deposition process. The deposition sequence resulted in significant variations in precipitate morphology, composition, and crystal structure within the GRCop-42, particularly at locations near the interface. When Alloy 718 was deposited first, dilution and convective mixing resulted in elevated Ni and Fe levels within the GRCop-42 deposit, which contributed to the formation of C14 (Cr, Ni, Fe)2Nb Laves and α-Cr phases. The anticipated C15 Cr2Nb precipitates were observed within the GRCop-42 material when the deposition sequence was reversed. |
| first_indexed | 2024-03-13T04:42:16Z |
| format | Article |
| id | doaj.art-4a979005be694b3ea064637f2f1cf3f7 |
| institution | Directory Open Access Journal |
| issn | 2772-3690 |
| language | English |
| last_indexed | 2024-03-13T04:42:16Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Additive Manufacturing Letters |
| spelling | doaj.art-4a979005be694b3ea064637f2f1cf3f72023-06-19T04:30:34ZengElsevierAdditive Manufacturing Letters2772-36902023-07-016100151Effects of deposition sequence on microstructural evolution in additively manufactured Cu-Cr-Nb alloy / superalloy bimetallic structuresA.D. Iams0T.J. Lienert1D.A. Otazu2M. Ramoni3National Institute of Standards and Technology (NIST), Gaithersburg, MD 20899, USA; Theiss Research, La Jolla, CA 92037, USA; Corresponding author.Optomec, Inc, Albuquerque, NM 87109, USARocket Lab USA, Inc., Long Beach, CA 90808, USANavajo Technical University, Crownpoint, NM 87313, USAAlthough Cu-Cr-Nb alloys / superalloys bimetallic components for liquid rocket engine applications have been fabricated using additive manufacturing, a detailed understanding of their process-structure relation is currently lacking. To bridge this gap, GRCop-42 / Alloy 718 bimetallic structures were fabricated with two different deposition sequences, using powder feedstock with a laser-based directed energy deposition process. The deposition sequence resulted in significant variations in precipitate morphology, composition, and crystal structure within the GRCop-42, particularly at locations near the interface. When Alloy 718 was deposited first, dilution and convective mixing resulted in elevated Ni and Fe levels within the GRCop-42 deposit, which contributed to the formation of C14 (Cr, Ni, Fe)2Nb Laves and α-Cr phases. The anticipated C15 Cr2Nb precipitates were observed within the GRCop-42 material when the deposition sequence was reversed.http://www.sciencedirect.com/science/article/pii/S2772369023000324Additive manufacturingLaser-based directed energy depositionCombustion chamberGRCop-42Laves phase |
| spellingShingle | A.D. Iams T.J. Lienert D.A. Otazu M. Ramoni Effects of deposition sequence on microstructural evolution in additively manufactured Cu-Cr-Nb alloy / superalloy bimetallic structures Additive Manufacturing Letters Additive manufacturing Laser-based directed energy deposition Combustion chamber GRCop-42 Laves phase |
| title | Effects of deposition sequence on microstructural evolution in additively manufactured Cu-Cr-Nb alloy / superalloy bimetallic structures |
| title_full | Effects of deposition sequence on microstructural evolution in additively manufactured Cu-Cr-Nb alloy / superalloy bimetallic structures |
| title_fullStr | Effects of deposition sequence on microstructural evolution in additively manufactured Cu-Cr-Nb alloy / superalloy bimetallic structures |
| title_full_unstemmed | Effects of deposition sequence on microstructural evolution in additively manufactured Cu-Cr-Nb alloy / superalloy bimetallic structures |
| title_short | Effects of deposition sequence on microstructural evolution in additively manufactured Cu-Cr-Nb alloy / superalloy bimetallic structures |
| title_sort | effects of deposition sequence on microstructural evolution in additively manufactured cu cr nb alloy superalloy bimetallic structures |
| topic | Additive manufacturing Laser-based directed energy deposition Combustion chamber GRCop-42 Laves phase |
| url | http://www.sciencedirect.com/science/article/pii/S2772369023000324 |
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