Microstructure and mechanical properties of porous Ni alloy fabricated by laser 3D printing
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摘要: 采用3D打印激光熔化技术制备了多孔镍基合金,并对其显微组织构成和压缩力学性能进行了分析。研究结果表明,采用3D打印激光熔化技术制备的多孔镍合金,孔隙率为14.68%~18.97%、抗压强度为461~535 MPa,其微观组织主要呈现γ-Ni枝晶,压缩断口为撕裂式枝晶断裂。
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关键词:
- 3D打印激光熔化技术 /
- 多孔镍合金 /
- 压缩性能 /
- 枝晶断裂
Abstract: In this paper, porous nickel-based alloys are produced using 3D printing laser melting technique. Microstructure and compressive mechanical properties of porous nickel-base alloys are studied. The results show that the porosity of the porous nickel alloy is 14.68%-18.97%, and the compressive strength is 461-535 MPa. The microstructure of porous nickel-based alloys is composed of γ-Ni dendrite. The SEM of compression fracture surface show that the fracture mode is the tearing dendrite fracture. -
图 2 激光加工截面示意图
Figure 2. Schematic section diagram of porous Ni alloy by laser processing
图 4 激光扫描多孔镍合金表面形貌特征
Figure 4. Microstructure photos of sample surface of porous Ni alloy prepared by laser 3D printing
表 2 不同功率参数多孔镍合金的平均孔径和孔隙率
Table 2. Average pore size and porosity of porous nickel alloy in different laser powers
功率参数/W 平均孔径/mm 孔隙率/% 100 0.40 14.68 110 0.42 18.96 120 0.50 18.97 
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