2026 Majeed TPMS Heat Treatment Dynamic Loading

Triply periodic minimal surfaces (TPMS), specifically fabricated from Inconel 718 (In718), are advantageous for components in aerospace, automotive, and energy sectors due to their exceptional physical characteristics. While TPMS structures have been explored for their mechanical performance under quasi-static compression, their behavior under dynamic loading has not been sufficiently studied. This research aim was to evaluate the mechanical properties of additively manufactured TPMS under both quasi-static and dynamic conditions; for this, suitable processing parameters were identified. Multiple-step heat treatments were applied to the TPMS structures, and various tests were conducted using a universal testing machine at different loading velocities. Additionally, the microstructure was analyzed through scanning electron microscopy (SEM), comparing as-built and heat-treated samples to assess the impact of heat treatment on mechanical properties. Results indicated a remarkable enhancement in the microstructure following treatment, with substantial improvements observed in mechanical strength upon dynamic loading conditions. The elastic modulus of the diamond TPMS increased by 541%, and energy absorption properties almost doubled under impact loading compared to quasi-static conditions. Overall, the heat treatment process significantly improved the mechanical performance of TPMS structures.