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- W3037312097 abstract "Abstract Owing to the high optical reflectivity of copper, silver, and gold in the infrared region, high laser power is required for laser-based additive manufacturing (L-AM). This increases the risk of damaging the laser optics due to sustained back-reflections and renders L-AM of reflective metals an unsustainable technology. To tackle this issue, a novel, industrially upscalable powder surface modification method is proposed and validated using a CuCr1 alloy. The surface of CuCr1 powder is modified by the outward diffusion of chromium in a nitrogen atmosphere, forming a rim around the powder particles. This doubled the optical absorption of the powder. Consequently, a mere 20% of the laser energy is required to process the surface-modified powder by laser powder bed fusion compared to the virgin CuCr1 powder. The fabricated parts demonstrate a very high thermal conductivity of 370 ± 15 W/(m·K) and tensile strength of 439 ± 19 MPa, after applying a suitable post-heat treatment." @default.
- W3037312097 created "2020-07-02" @default.
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- W3037312097 date "2020-10-01" @default.
- W3037312097 modified "2023-10-10" @default.
- W3037312097 title "Surface Modified Copper Alloy Powder for Reliable Laser-based Additive Manufacturing" @default.
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- W3037312097 doi "https://doi.org/10.1016/j.addma.2020.101418" @default.
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