Abstract
Due to the small freezing range of eutectic alloys, the Cotac-type alloys might be viable alternatives to conventional Ni-based superalloys when processed through additive manufacturing. Laser-pass assessment reveals that both Cotac-74 and Cotac-744 display improved cracking resistance when compared to the conventional Ni-based superalloy CM247LC. During laser powder bed fusion Cotac-74 displayed the highest cracking resistance, with no microcracking detected in the as-built or heat-treated microstructure. The promising results presented for Cotac-74 highlight the possible use of this alloy for the additive manufacturing of high-temperature aerospace components.
Original language | English |
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Title of host publication | Superalloys 2024 |
Publisher | Springer Cham |
Chapter | 80 |
Pages | 860-870 |
ISBN (Electronic) | 978-3-031-63937-1 |
ISBN (Print) | 978-3-031-63936-4 |
DOIs | |
Publication status | Published - 21 Aug 2024 |
Keywords
- nickel alloys
- laser methods
- electron microscopy
- in-situ composites
- additive manufacturing
- other