PSI - Issue 53

S. Senol et al. / Procedia Structural Integrity 53 (2024) 12–28

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Author name / Structural Integrity Procedia 00 (2019) 000–000

microstructure and machined tensile samples). The run-out at 2 x 10 6 cycles is reached at the following stress amplitudes: 124 MPa (for AB), and 212 MPa (for R, EDM, and M).

Fig. 6. Three-point bending fatigue test results displaying stress amplitude vs number of cycles for AB, R, EDM, and M conditions from this study, and as a reference, AB AlSi10Mg (Series A) from work of Beretta et al., 2020. The run-outs at 2 x 10 6 cycles for each condition are indicated with the arrows.

Fig. 7. SEM images displaying fracture surfaces of 3PBF samples with (a) AB, (b) R, (c) EDM, and (d) M surface conditions. Initiation points are shown with solid white arrows, while dashed white arrows and dashed white lines indicate the propagation and transition to the final fracture zone, respectively. The zoomed in images of the crack initiation points, indicated by red rectangles in a-d, for (e) AB, (f) R, (g) EDM, and (h) M. (i) Transition zone from (j) propagation to (k) final fracture zone, with (l) dimple formation.