Laser Powder Bed Fusion Additive Manufacturing of Highly Conductive Parts Made of Optically Absorptive Carburized CuCr1 Powder
| Autor: | Etienne Brodu, Kim Vanmeensel, Brecht Van Hooreweder, Pushkar Dhekne, Jan Van Humbeeck, Jean-Pierre Kruth, Suraj Dinkar Jadhav, Sasan Dadbakhsh |
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| Rok vydání: | 2021 |
| Předmět: |
Fabrication
Materials science Additive manufacturing chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Thermal conductivity law lcsh:TA401-492 General Materials Science Laser power scaling Composite material Absorption (electromagnetic radiation) Electrical conductor Selective laser melting Carburized CuCr1 powder Mechanical Engineering 021001 nanoscience & nanotechnology Laser Copper 0104 chemical sciences Metal matrix composite chemistry Mechanics of Materials Laser powder bed fusion lcsh:Materials of engineering and construction. Mechanics of materials Copper reflectivity 0210 nano-technology Layer (electronics) |
| Zdroj: | Materials & Design, Vol 198, Iss, Pp 109369-(2021) |
| Popis: | Fabrication of fully dense and highly conductive copper alloy parts via laser-based additive manufacturing (L-AM) is challenging due to the high optical reflectivity and high thermal conductivity. To overcome this, the use of optically absorptive surface-modified copper powders is being evaluated in the laser powder bed fusion (LPBF) process. Although the surface-modified powders exhibit high optical absorption at room temperature, not all of them allow the fabrication of fully dense parts at a laser power below 500 W. Accordingly, this article proposes the use of optically absorptive carburized CuCr1 powder for the consistent fabrication of copper parts. Moreover, a densification mechanism of parts is discussed to explain the distinct LPBF processing behavior of different surface-modified powders, such as carburized CuCr1 and carbon mixed CuCr1 powders, albeit having similar room temperature optical absorption. This investigation clearly outlines the advantage of a firmly bonded modified layer present on the surface of the carburized CuCr1 powder over a loosely attached carbon nanoparticle layer present in the carbon-mixed CuCr1 powder. Apart from the successful fabrication of CuCr1 parts, fabricated parts are subjected to two different post-heat treatments, and it is shown that the final properties can be customized by applying tailored post-heat treatments. ispartof: Materials & Design vol:198 status: published |
| Databáze: | OpenAIRE |
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