Additive manufacturing of titanium-base alloys with equiaxed microstructures using powder blends

被引：59

作者：

Choi, Gwanghyo ^{[1
]}

Choi, Won Seok ^{[1
]}

Han, Jeongho ^{[2
]}

Choi, Pyuck-Pa ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Daejeon 34141, South Korea

[2] Hanyang Univ, Div Mat Sci & Engn, Seoul 04763, South Korea

来源：

ADDITIVE MANUFACTURING | 2020年 / 36卷

基金：

新加坡国家研究基金会;

关键词：

Additive manufacturing; Direct energy deposition; Ti-based alloys; Powder blend; Anisotropy; DIRECT LASER DEPOSITION; GRAIN-REFINEMENT; MECHANICAL-PROPERTIES; METALLIC COMPONENTS; TENSILE PROPERTIES; TI-6AL-4V; BEHAVIOR; BETA; DEFORMATION; EVOLUTION;

D O I：

10.1016/j.addma.2020.101467

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：8

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