Investigation on Mechanical Properties and Energy Absorption Capabilities of AlSi10Mg Triply Periodic Minimal Surface Sheet Structures Fabricated via Selective Laser Melting

Porous structures of aluminum alloys have many potential applications in the aerospace industry and heat exchangers. However, traditional manufacturing techniques face challenges in fabricating these structures. Selective laser melting (SLM) can be considered an appropriate alternative for this purp...

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Veröffentlicht in:Journal of materials engineering and performance 2022-11, Vol.31 (11), p.9110-9121
Hauptverfasser: Sun, Qidong, Sun, Jie, Guo, Kai, Liu, Jiangwei
Format: Artikel
Sprache:eng
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Zusammenfassung:Porous structures of aluminum alloys have many potential applications in the aerospace industry and heat exchangers. However, traditional manufacturing techniques face challenges in fabricating these structures. Selective laser melting (SLM) can be considered an appropriate alternative for this purpose due to its suitable sophistication and accuracy. Herein, the effects of heat treatment on the mechanical properties and energy absorption capabilities of three triply periodic minimal surface (TPMS) structures were investigated using compression tests. After heat treatment, their ultimate elongation increased by more than 120% (from 8.07 to 18.45%). The results also indicate that heat treatment improved the plasticity and energy absorption capability of TPMS structures fabricated via SLM. The compression fracture morphology of samples revealed that the fracture mechanism of TPMS porous structure changed from brittle-to-ductile fracture after a solution treatment of 2 h at 530°C, following which water quenching and artificial aging were performed for 6 h at 170°C. The energy absorption capabilities of the TPMS structures were optimized using heat treatment. After heat treatment, the energy absorption capabilities of the three TPMS structures (Schwarz P, Gyroid, and Schwarz D) at a strain of 50% were 2.76, 8.79, and 16.41 MJ/m 3 , respectively. Meanwhile, their respective maximum energy absorption efficiencies were 43.5, 47.0, and 51.5%.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-022-06883-5