期刊
ADDITIVE MANUFACTURING
卷 36, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.addma.2020.101467
关键词
Additive manufacturing; Direct energy deposition; Ti-based alloys; Powder blend; Anisotropy
资金
- KAIST GCORE (Global Center for Open Research with Enterprise) - Ministry of Science and ICT [N11200010]
- National Research Foundation of Korea (NRF) [NRF-2019R1A2C1002165]
- National Research Foundation of Korea [N11200010] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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