PSI - Issue 42

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Rui F. Fernandes et al. / Procedia Structural Integrity 42 (2022) 1054–1060 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 4. U parameter for AB, HIP and 250ºC series

4. Conclusions This investigation focuses on the effect of heat treatment on FCG behavior of AlSi10Mg Aluminum alloy produced by LPBF. To do that, it was used CT specimens in the as built state and with two different heat treatments at 250ºC: HIP and Stress relief. The main conclusions are: The application of the heat treatments contributes to the decrease in the hardness of the material; The AB specimens has higher values of crack propagation, when compared with the treated samples for the stress ratio of R=0.05; HIP does not show better performance than the stress relief; The high resistance of heat treated samples cannot be justified by the crack closure levels, since there is no significant crack closure levels for each case. To fully address this topic some studies will be done: it will be analyzed the FCG behavior of the alloy for a stress ratio of R=0.4; It will be measured the residual stress of the material for each case. References 1706, DIN EN., 2021. Aluminium and Aluminium Alloys - Castings - Chemical Composition and Mechanical Properties. Brandão, A., Gumpinger, J., Gschweitl, M., Seyfert, C., Hofbauer, P., Ghidini, T., 2017. Fatigue Properties of Additively Manufactured AlSi10Mg-Surface Treatment Effect. Procedia Structural Integrity 7, 58 – 66. Chen, C., Ye, D., Zhang, L., Liu, J., 2018. DIC-Based Studies of the Overloading Effects on the Fatigue Crack Propagation Behavior of Ti-6Al 4V ELI Alloy. International Journal of Fatigue 112, 153 – 64. Fiocchi, J., Tuissi, A., Biffi, C., 2021. Heat Treatment of Aluminium Alloys Produced by Laser Powder Bed Fusion: A Review. Materials and Design 204. Giovanni, M., Menezes, J., Bolelli, G., Cerri, E., Castrodeza, E., 2019. Fatigue Crack Growth Behavior of a Selective Laser Melted AlSi10Mg. Engineering Fracture Mechanics 217, 106564. GmbH, EOS - Electro Optical Systems., 2014. Material Data Sheet: EOS Aluminium AlSi10Mg., 2014. Macías, J., Elangeswaran, C., Zhao, Z., Buffière, J., Hooreweder, B., Simar, A., 2021. Fatigue Crack Nucleation and Growth in Laser Powder Bed Fusion AlSi10Mg under as Built and Post-Treated Conditions. Materials and Design 210, 110084.