Surface Polishing of Laser Powder Bed Fused Superalloy Components by Magnetic Post-treatment

2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP) Pub Date : 2020-11-09 DOI:10.1109/NAP51477.2020.9309600

D. Lesyk, V. Dzhemelinskyi, B. Mordyuk, S. Martínez, O. Stamann, A. Lamikiz

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引用次数: 6

Abstract

The laser powder bed fusion (LPBF) process is one of an additive manufacturing method for the production of complexly shaped parts, which suffer from a rough surface, excessive residual porosity, and tensile residual stress in the near-surface layer. The magnetic polishing can be applied to improve the surface characteristics of complexly shaped and small-sized LPBF-built parts. This paper focuses on a study of the effect of magnetic treatment on the surface roughness, porosity, and hardness of Inconel 718 alloy parts printed by LPBF. The defects on the surface were also analyzed. Results indicated that applied magnetic polishing leads to a decrease in the surface roughness. The spherical or ellipsoidal balls and partially melted powder particles were successfully removed from the treated surface by magnetic treatment. The surface hardness was increased by about 20% in comparison with that of the LPBF-built specimen (32.2 HRC}$_{\mathbf{10}}$).

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磁后处理激光粉末床熔合高温合金部件表面抛光

激光粉末床熔合(LPBF)工艺是一种用于生产复杂形状零件的增材制造方法，这些零件存在表面粗糙、残余孔隙过多和近表层残余拉伸应力等问题。磁抛光可用于改善形状复杂、尺寸小的lpbf零件的表面特性。研究了磁处理对LPBF列印Inconel 718合金零件表面粗糙度、孔隙率和硬度的影响。对表面缺陷进行了分析。结果表明，磁抛光使表面粗糙度降低。通过磁处理成功地将球形或椭球和部分熔化的粉末颗粒从处理表面去除。与lpbf构建的试样相比，表面硬度提高了约20% (32.2 HRC}$_{\mathbf{10}}$)。

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2020 IEEE 10th International Conference Nanomaterials: Applications & Properties (NAP)

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