Study of energy density on mechanical properties of laser additively manufactured AlSi10Mg alloy

Wei Luo; Jizhuang Hui; Junjie Wang; Zhiqiang Yan; Xu Guo; Zhiguang Xu

doi:10.1117/12.3025413

28 February 2024 Study of energy density on mechanical properties of laser additively manufactured AlSi10Mg alloy

Wei Luo, Jizhuang Hui, Junjie Wang, Zhiqiang Yan, Xu Guo, Zhiguang Xu

Proceedings Volume 13071, International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2023); 1307103 (2024) https://doi.org/10.1117/12.3025413
Event: International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2023), 2023, Shenyang, China

Abstract

Selective laser melting (SLM) technology is widely used in additive manufacturing of three-dimensional complex parts, but its high temperature gradient produces residual stresses on the components, which significantly affects the quality of the components. A 3D finite element model (FEM) of AlSi10Mg is built to simulate the SLM forming process, and evolution of residual stresses are analysed, as well as the effects of different exposure times and laser powers on residual stresses. The outcomes demonstrate that the distribution of residual stresses is characterised by periodicity, and the stresses in the scanning channel and between adjacent scanning channels, and at the lap of the melt pool are obviously larger than those in other regions. The residual tensile stress enhances with the magnify of laser power, however when the laser power maximise to a certain value, the remelting effect is significantly enhanced, and the residual stress is better released. The longer the exposure time is, the more uniform the heating of the melted area, the slower the cooling rate, and the gradual reduction of residual stress to ensure the processing quality.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Wei Luo, Jizhuang Hui, Junjie Wang, Zhiqiang Yan, Xu Guo, and Zhiguang Xu "Study of energy density on mechanical properties of laser additively manufactured AlSi10Mg alloy", Proc. SPIE 13071, International Conference on Mechatronic Engineering and Artificial Intelligence (MEAI 2023), 1307103 (28 February 2024); https://doi.org/10.1117/12.3025413

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