Microstructure, Mechanical Properties and Residual Stress of Selective Laser Melted AlSi10Mg
- 30 Downloads
AlSi10Mg processed by selective laser melting (SLM) is common in various industries because of its complex structure and high performance. The microstructure, residual stress and mechanical properties restrict its application, while they are affected by the scanning path type and preheating temperature. In this work, to investigate the properties of selective laser melted AlSi10Mg alloys and gain better performance results, the microstructure and mechanical tests are performed at several preheating temperatures based on the uniformity and chessboard scanning strategy. It is found that the selective laser melted AlSi10Mg parts fabricated in the chessboard scanning path have better mechanical properties than those fabricated in the uniformity scanning path. Furthermore, a higher preheating temperature can induce less residual stress due to the enhanced Al crystal faces. Finally, analyses of the microstructures, mechanical and residual stress provide a valuable suggestion that the combination of the range of preheating temperature and the scanning path can improve the performance of selective laser melted AlSi10Mg.
KeywordsAlSi10Mg mechanical properties microstructure residual stress selective laser melting
The authors would like to acknowledge the support of Shanghai Sailing Program (No. 18YF1418400).
- 1.U. Tradowsky, J. White, R.M. Ward, N. Read, W. Reimers, and M.M. Attallah, Selective Laser Melting of AlSi10Mg: Influence of Post-processing on the Microstructural and Tensile Properties Development, Mater. Des., 2016, 105, p 212–222. https://doi.org/10.1016/j.matdes.2016.05.066 CrossRefGoogle Scholar
- 8.K. Kempen, L. Thijs, E. Yasa, M. Badrossamay, W. Verheecke, and J.P. Kruth. Process Optimization and Microstructural Analysis for Selective Laser Melting of AlSi10Mg. Solid Freeform Fabrication Symposium, Austin, TX, USA, 2011.Google Scholar
- 10.D. Gu, H. Wang, F. Chang, D. Dai, P. Yuan, Y. Hagedorn, and W. Meiners, Selective Laser Melting Additive Manufacturing of TiC/AlSi10Mg Bulk-Form Nanocomposites with Tailored Microstructures and Properties, Phys. Procedia, 2014, 56(56), p 108–116. https://doi.org/10.1016/j.phpro.2014.08.153 CrossRefGoogle Scholar
- 14.W. Li, S. Li, J. Liu, A. Zhang, Y. Zhou, Q. Wei, C. Yan, and Y. Shi, Effect of Heat Treatment on AlSi10Mg Alloy Fabricated by Selective Laser Melting: Microstructure Evolution, Mechanical Properties and Fracture Mechanism, Mater. Sci. Eng. A, 2016, 663, p 116–125. https://doi.org/10.1016/j.msea.2016.03.088 CrossRefGoogle Scholar
- 18.M. Zhang, C. Liu, X. Shi, X. Chen, C. Chen, J. Zuo, J. Lu, and S. Ma, Residual Stress, Defects and Grain Morphology of Ti-6Al-4V Alloy Produced by Ultrasonic Impact Treatment Assisted Selective Laser Melting, Appl. Sci., 2016, 6(11), p 304–310. https://doi.org/10.3390/app6110304 CrossRefGoogle Scholar