材料科学
高温合金
微观结构
真空感应熔炼
极限抗拉强度
冶金
合金
压痕硬度
粒径
碳化物
镍
粉末冶金
金属粉末
粒子(生态学)
复合材料
金属
化学工程
工程类
地质学
海洋学
作者
Wuming Jia,Xueting Chen,Mingwei Wei,Jing Liang,Changsheng Liu,Jinguo Li
标识
DOI:10.1080/00325899.2018.1546921
摘要
Nickel-based K417G superalloy powder is the main material used in laser additive manufacturing (LAM) of aerospace engine turbine blades. In this study, K417G powder was prepared by the vacuum induction melting gas atomisation method (VIGA). Powder characteristics and microstructure were measured, and the properties of fabricated samples were studied. The results show that the powder mean particle size D50 was 74 μm, flowability was 16.6 s/50 g, apparent density was 4.78 g cm–3, and the oxygen content of the powder was 0.015%. Powder and LAM sample microstructure consisted of γ, γ′, and carbide. The average microhardness was 410 HV, tensile strength was 1080 MPa, yield strength was 828 MPa and elongation was 13.52%. K417G superalloy powder prepared by VIGA method has potential for application in laser additive manufacturing.
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