PSI - Issue 83

Sze Pei Tan et al. / Procedia Structural Integrity 83 (2026) 28–40

39

Fig. 10. Fracture surface of the CT specimen from top view .

5. Conclusion This study explored the mechanical behavior of AlSi10Mg that is fabricated by DMLS under tensile and fatigue loading in both the as-built and T6 heat-treated conditions. The results show that heat treatment significantly increases the mechanical performance of the AlSi10Mg. The UTS increased from 280.4 MPa to 310.2 MPa in the A-built condition after T6 treatment, while the elongation improved significantly from 4.3% to 14.7%, indicating a significant increase in ductility. Fatigue life testing further confirmed the beneficial effect of heat treatment, with heat-treated specimens exhibiting improved fatigue resistance compared to the as-built condition under equivalent loading levels. The combined improvement in strength, ductility, and cyclic stability indicates that post-T6 processing plays a critical role in optimizing the structural performance of DMLS-fabricated AlSi10Mg. Overall, the findings provide baseline mechanical data for the tensile and fatigue life behavior of Additively Manufactured AlSi10Mg and support its application in lightweight engineering components. Future study will focus on the fatigue crack growth and microstructure analysis of the DMLS fabricated sample. Acknowledgements The author would like to acknowledge the Malaysian Ministry of Higher Education, under the Fundamental Research Grant Scheme (FRGS/1/2023/TK10/UMP/02/7, university reference RDU230104), and Universiti Malaysia Pahang Al-Sultan Abdullah (PGRS220386) for financial support. References [1] Lim, C. W. J., Le, K. Q., Lu, Q., and Wong, C. H., “An Overview of 3-D Printing in Manufacturing, Aerospace, and Automotive Industries” IEEE Potentials 35, no. 4 18–22 (2016): . doi: 10.1109/MPOT.2016.2540098. [2] Rahman, M. M. and Ramzan, A., “ADDITIVE MANUFACTURING AND 3D PRINTING FOR AEROSPACE AND AUTOMOTIVE INDUSTRIES” Spectrum of Engineering Sciences 1241–1259 (2025): . doi: 10.5281/zenodo.16477032. [3] Shaari, M. S., Ariffin, A. K., Takahashi, A., Abdullah, S., Kikuchi, M., and Akramin, M. R. M., “Fatigue crack growth analysis on square prismatic with embedded cracks under tension loading” Journal of Mechanical Engineering and Sciences 11, no. 1 2511–2526 (2017): . doi: 10.15282/jmes.11.1.2017.10.0231. [4] Raus, A. A., Wahab, M. S., Ibrahim, M., Kamarudin, K., Ahmed, A., and Shamsudin, S., “Mechanical and physical properties of AlSi10Mg processed through selective laser melting” AIP Conference Proceedings 1831, no. 1 20027 (2017): . doi: 10.1063/1.4981168. [5] Kunisetti, P. and Prasad, B. S., “A detailed study on optimizing DMLS process parameters to enhance AlSi10Mg metal component properties” Journal of Engineering and Applied Science 71, no. 1 177 (2024): . doi: 10.1186/s44147-024-00514-7. [6] Cabrini, M. et al. , “Effect of heat treatment on corrosion resistance of DMLS AlSi10Mg alloy” Electrochimica Acta 206 346–355 (2016): . doi: https://doi.org/10.1016/j.electacta.2016.04.157. [7] Yan, Q., Song, B., and Shi, Y., “Comparative study of performance comparison of AlSi10Mg alloy prepared by selective laser melting and casting” Journal of Materials Science and Technology 41 199–208 (2020): . doi: 10.1016/j.jmst.2019.08.049. [8] Read, N., Wang, W., Essa, K., and Attallah, M. M., “Selective laser melting of AlSi10Mg alloy: Process optimisation and mechanical