PSI - Issue 83

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 83 (2026) 28–40

© 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the ESIAM26 organizers Keywords: Additive manufacturing; DMLS; Fatigue test; Fatigue crack growth analysis; Surface cracks Abstract Direct metal laser sintering (DMLS) has become a promising additive manufacturing (AM) technique to fabricate the aluminum alloy components with complex geometry for lightweight engineering applications. However, the mechanical properties in the as- built condition require additional post processing to improve overall mechanical performance. This study investigates the mechanical characteristics of AlSi10Mg specimen fabricated by DMLS under tensile and fatigue loading. As built specimen and heat-treated specimen were subjected to tensile and fatigue life testing to obtain the mechanical properties. The tensile testing results show that the heat treatment improved both strength and ductility by increasing the ultimate tensile strength from 280.4 MPa to 310.2 MPa and the elongation increases from 4.3% to 14.7%. On the other hand, fatigue testing results show the promising improvement in fatigue resistance for heat treated specimen as compared to as-built specimen. This finding provides a preliminary insight into the mechanical characteristics of DLMS fabricated AlSi10Mg for engineering applications and highlights the need for further comprehensive investigations. The fourth European Conference on the Structural Integrity of Additively Manufactured Materials (ESIAM26) Investigation of Mechanical Characteristics of DMLS-Fabricated AlSi10Mg under Tensile and Fatigue Loading Sze Pei Tan a , Abdulla All Noman a , Mohd Akramin Mohd Romlay a , M.J. Mohammad Fikry b , Abdulnaser M. Alshoaibi c , Nasrul Azuan Alang a , Mohd Shamil Shaari a* a Faculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang Al-Sultan Abdullah 26600, UMPSA Pekan, Pahang, Malaysia b Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima City, Hiroshima, 739 8527, Japan c Department of Mechanical Engineering, College of Engineering and Computer Sciences, Jazan University, Jazan 45142, Saudi Arabia

* Corresponding author. Tel.: +609-424-6200 E-mail address: *shamil@umpsa.edu.my

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the ESIAM26 organizers 10.1016/j.prostr.2026.07.004