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Reflectance Characteristics of Al Alloys Containing Si, Mg, Cu, and Lanthanide (Nd, Sm, Gd) for 3D Printing

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Abstract

To fabricate a low-reflectance aluminum alloy, we have analyzed the changes in reflectance according to the morphology, components, and composition of the aluminum alloy. We find that the larger the particle size of the powder, the lower is the reflectance. This is attributed to the fact that the larger the particle size, the greater is the amount of light absorbed into the interparticle space in the powder. In addition, the reflectance decreases with increase in the Si and Mg contents, because of the lower reflectance of the strengthening phase formed in the alloy as compared to that of aluminum. In contrast, lanthanide addition causes an increase in the reflectance, which is attributed to an increase in the electrical conductivity of the alloy.

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Acknowledgements

This work was supported by the Materials and Components Technology Development Program of MOTIE/KEIT [10077396, Development of aluminium spheroidized powder of 10 to 50 size over 320 MPa strength for additive manufacturing].

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  1. Center for Advanced Materials and Processing, Institute for Advanced Engineering, Yongin, 17180, Republic of Korea

    Gwang Mook Choi, Dae Guen Kim, Byoungyong Im & Hong Jun Chae

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  1. Gwang Mook Choi
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  2. Dae Guen Kim
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  3. Byoungyong Im
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  4. Hong Jun Chae
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Correspondence to Hong Jun Chae.

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Choi, G.M., Kim, D.G., Im, B. et al. Reflectance Characteristics of Al Alloys Containing Si, Mg, Cu, and Lanthanide (Nd, Sm, Gd) for 3D Printing. Met. Mater. Int. 25, 946–955 (2019). https://doi.org/10.1007/s12540-019-00256-9

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