Abstract Scope |
Laser Powder Bed Fusion (LBPF) AlSi10Mg is used in the aerospace and automotive industries for its refined microstructure and ductility compared to cast alloys. However, LPBF processes can inherently lead to defects that may act as fatigue crack initiators, such as lack of fusion, balling, and keyhole porosity. This work focuses on the analysis of high cycle fatigue (HCF) endurance of AlSi10Mg under expected service time and temperature. For this study, AlSi10Mg specimens were printed on an EOS M290 LPBF system and heat-treated by stress relief (SR1) and HIP+T6, as per ASTM 3318. Specimens were subsequently artificially aged at 350°F for 0, 10, 100, and 1000 hours. HCF as per E466 was conducted to determine the endurance of the specimens at various stress levels. A comparison of the results from the effect of the extended thermal aging on the endurance of the heat-treated specimens is presented. |