Additive manufacturing of titanium-base alloys with equiaxed microstructures using powder blends
- Authors
- Choi, Gwanghyo; Choi, Won Seok; Han, Jeongho; Choi, Pyuck-Pa
- Issue Date
- Dec-2020
- Publisher
- ELSEVIER
- Keywords
- Additive manufacturing; Direct energy deposition; Ti-based alloys; Powder blend; Anisotropy
- Citation
- ADDITIVE MANUFACTURING, v.36, pp.1 - 8
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADDITIVE MANUFACTURING
- Volume
- 36
- Start Page
- 1
- End Page
- 8
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/1682
- DOI
- 10.1016/j.addma.2020.101467
- ISSN
- 2214-8604
- Abstract
- The microstructures and tensile properties of additively manufactured Ti-base alloys were investigated. Ti-6A14V and Co-Cr-Mo alloy powders were blended and used for directed energy deposition of bulk samples containing 5 and 10 wt% Co. The Ti-6Al-4V and 5 wto% Co samples exhibited an a phase at ji grain boundaries, which caused a significant reduction and anisotropy of the tensile ductility. A single-phase beta microstructure exhibiting equiaxed grains with a grain size of 36 1m, random texture, and isotropic tensile properties was obtained for the as-deposited 10 wt% Co sample. These phenomena could be ascribed to the high Co content and the resulting enhanced stability of the ji phase and the constitutional supercooling of the melt-pool.
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