Cracking Behaviour of René 80-Type Superalloy During Laser-Based Directed Energy Deposition
Features of microstructure, mechanical properties, and cracking behaviour of the René 80-type superalloy manufactured by laser-based directed energy deposition (DED-LB) have been investigated. Different cracking behaviours were observed in two thin walls fabricated by DED-LB under different conditions. The defect-free thin wall was produced at low power and scanning speed, while increasing energy input during the process led to intensive cracking. Two types of cracks that developed in the René 80-type superalloy were identified: solidification hot cracking and ductility-dip cracking (DDC), caused by σ-phase particles. It was found that transition from an equiaxed structure to a columnar one increased the susceptibility to crack propagation.
Authors
- Sergey Zherebtsov (ORCID: https://orcid.org/0000-0002-1663-429X)
- Anastasiia Dmitrieva (ORCID: https://orcid.org/0000-0002-4643-6550)
- Rudolf Korsmik (ORCID: https://orcid.org/0000-0003-1591-1942)
- Nikita Stepanov
- Olga Klimova-Korsmik (ORCID: https://orcid.org/0000-0002-2619-8874)
- Ilya Astakhov (ORCID: https://orcid.org/0009-0008-5409-9997)
- N. Yurchenko (ORCID: https://orcid.org/0000-0002-6078-8325)
- M. Klimova (ORCID: https://orcid.org/0000-0002-2188-0209)
- Grigoriy Zadykyan
Institutions
- Belgorod National Research University (RU)
- State Marine Technical University of St. Petersburg (RU)
Publication Details
- Journal
- Metals
- Published
- 2024-12-13
- DOI
- https://doi.org/10.3390/met14121434
- Citations
- 3
- Primary Topic
- Additive Manufacturing Materials and Processes
- Type
- article
- Field-Weighted Citation Impact
- 0.64
Funders
- Russian Science Foundation
- Ministry of Science and Higher Education of the Russian Federation