Characterisation of T<sub>1</sub> (Al<sub>2</sub>CuLi) Precipitates in Conventional (2099-T83) and Laser Additive Manufactured (PBF-LB/M, DED-LB/M) Microstructures
Abstract The high strength and lightweight benefits of Al-Cu-Li alloys make them attractive for aerospace applications. The major strength contributing phase is the T 1 (Al 2 CuLi) phase. Although extensive reporting is known on its nucleation behaviour and structure in conventional T 1 microstructures, little is known for additive manufacturing (AM). This work focusses on the comparative characterisation of T 1 phase (structure, nucleation behaviour) in conventional (2099-T83), Powder Bed Fusion (PBF-LB/M) and Direct Energy Deposition (DED-LB/M) AA2099 microstructures. It is shown that with different AM processes and heat treatments, different T 1 microstructures are achievable.
Authors
- Iris Raffeis (ORCID: https://orcid.org/0000-0002-2846-5083)
- Narottam P. Bansal (ORCID: https://orcid.org/0000-0001-6628-0533)
- Chijioke Kenneth Akuata
- Frank Adjei-Kyeremeh (ORCID: https://orcid.org/0000-0002-5554-465X)
- S Zischke
- A. Polaczek
Institutions
- RWTH Aachen University (DE)
Publication Details
- Journal
- IOP Conference Series Materials Science and Engineering
- Published
- 2024-08-01
- DOI
- https://doi.org/10.1088/1757-899x/1310/1/012003
- Primary Topic
- Additive Manufacturing Materials and Processes
- Type
- article
- Field-Weighted Citation Impact
- 0.00