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Additive Manufacturing of Al-12Si Alloy Via Pulsed Selective Laser Melting

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Abstract

Additive manufacturing (AM) of metallic materials is experiencing a research and commercialization craze in almost all industrial sectors. However, to date, AM has been limited to a small numbers of alloys. With respect to aluminum, two alloys received some attention: Al-12Si and Al-10Si-1Mg. In both cases, fully dense components have been achieved using a continuous-wave selective laser melting system. In this article, a new approach of selective laser melting using a pulsed-laser source as opposed to a continuous-wave laser is proposed. Pulse selective laser melting (P-SLM) would allow for greater control over the heat input and thus further optimization possibilities of the microstructure. P-SLM was demonstrated using the Al-12Si system. Si refinement below 200 nm was achieved throughout the component. Density up to 95% and high hardness of above 135 HV were obtained. The solidification mechanism is also explained.

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Acknowledgement

The authors would like to thank AUTO21 (Grant C502-CPM) for financial support of this research.

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Authors and Affiliations

  1. Department of Mining and Materials Engineering, McGill University, Montreal, QC, H3A 0C5, Canada

    R. Chou, J. Milligan, M. Paliwal & M. Brochu

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  1. R. Chou
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  2. J. Milligan
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  3. M. Paliwal
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  4. M. Brochu
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Correspondence to M. Brochu.

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Chou, R., Milligan, J., Paliwal, M. et al. Additive Manufacturing of Al-12Si Alloy Via Pulsed Selective Laser Melting. JOM 67, 590–596 (2015). https://doi.org/10.1007/s11837-014-1272-9

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  • DOI: https://doi.org/10.1007/s11837-014-1272-9

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