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Effect of Processing Parameters on Tensile Properties and Microstructure of Selective Laser Melted AlSi10Mg Alloy

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Abstract

Selective laser melting (SLM) technology is one of the commonly used technologies in metal additive manufacturing. In this study, AlSi10Mg powder was used as the raw material to form 9 groups of specimens with different combinations of laser power and scanning speeds through the SLM process. Tensile testing, density testing, XRD, LSCM, SEM and EDS analysis were performed to indicate the effects of laser power and scanning speed on density, microstructure and tensile properties of SLM AlSi10Mg alloys were studied. The results show that increasing the laser power and reducing the scanning speed within a certain range can improve the continuity of the formed specimens, and significantly reduce the porosity. For parameter combinations with the same energy density, when laser power and scanning speed are simultaneously increased, the laser power has a dominant effect on increasing the temperature inside the molten pool, leading to more uniform melting of the powder. This can improve both the density and internal porosity distribution, and furthermore produce more precise and uniform microstructures. The relative density and tensile strength of the specimens formed at 225 W/1625 mm/s are 3.6 and 16.5% higher than 135 W/975 mm/s, respectively.

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Data Availability

The data that support the findings of this study are available from the corresponding author, Bing Yang, upon reasonable request.

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Acknowledgments

The authors thank Ke Lv, Ben Xu, Shuancheng Wang and Qiang Fang for assistance with the experiment. In particular, the authors would like to thank Zhangmei Hu, Xiaoke Zheng and Jue Wang at Analysis and Testing Center of Southwest Jiaotong University for their assistance with XRD, SEM and EDS test.

Funding

This work was supported by the National Natural Science Foundation of China (52375159) and the National Railway Administration of the P. R. C (KF2023-025).

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Authors and Affiliations

  1. State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu, 610031, China

    Mian Huang, Bing Yang, Yuwei Zhou, Xinlong Guan, Yuanzhi Wang, Shoune Xiao, Guangwu Yang & Tao Zhu

  2. School of Mechanical Engineering, Sichuan University, Chengdu, 610065, China

    Zhen Liao

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  1. Mian Huang
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Contributions

Mian Huang was responsible for conceptualization, methodology, experimentation, data curation and writing—original draft. Bing Yang was involved in supervision and writing—review & editing. Yuwei Zhou took part in sample preparation, experimentation, investigation and editing. Xinlong Guan participated in sample preparation, experimentation and editing. Yuanzhi Wang contributed to sample preparation and experimentation. Zhen Liao assisted with conceptualization and supervision. Shoune Xiao helped with language modification and writing—review. Guangwu Yang and Tao Zhu did supervision and writing—review.

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Correspondence to Bing Yang.

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Huang, M., Yang, B., Zhou, Y. et al. Effect of Processing Parameters on Tensile Properties and Microstructure of Selective Laser Melted AlSi10Mg Alloy. J. of Materi Eng and Perform (2024). https://doi.org/10.1007/s11665-024-09536-x

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  • DOI: https://doi.org/10.1007/s11665-024-09536-x

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