Effect of process atmosphere on microstructure, melt pool, texture, precipitate characteristics, and mechanical properties of laser powder bed fusion Fe-12Cr-6Al
SCOPUS
- Title
- Effect of process atmosphere on microstructure, melt pool, texture, precipitate characteristics, and mechanical properties of laser powder bed fusion Fe-12Cr-6Al
- Authors
- Cakmak, Omer; Chung, Seong Gyu; Lee, Seung-Hoon; Koo, JiHoe; Yeom, Hwasung; Cho, Jung-Wook
- Date Issued
- 2024-07
- Publisher
- Elsevier
- Abstract
- This study investigates the impact of atmospheres (Ar and N2) on Fe-12Cr-6Al alloy fabricated using laser powder bed fusion (L-PBF) in terms of melt pool shape/size, microstructure, precipitate characteristics, and mechanical properties. The sample built in the N2 atmosphere exhibited lower porosity, wider melt pools, and no Al2O3 agglomeration. Oxygen content decreased from 0.012 to 0.0045 (wt.%), and nitrogen content increased from 0.013 to 0.02 (wt.%). The Ar-printed sample had a yield strength (YS) of 232 ± 15 MPa, ultimate tensile strength (UTS) of 286 ± 10 MPa, and total elongation (TE) of 6.4 ± 1.3 %, while the N2-printed sample showed significant improvements of the mechanical properties: YS of 315 ± 11 MPa, UTS of 401 ± 11 MPa, and TE of 7.8 ± 1.1 %. Therefore, N2 might be considered to replace Ar as a cost-effective shielding gas for FeCrAl alloys, with improved properties. © 2024
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/123459
- DOI
- 10.1016/j.addlet.2024.100219
- ISSN
- 2772-3690
- Article Type
- Article
- Citation
- Additive Manufacturing Letters, vol. 10, page. 100219, 2024-07
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