Improvement of fatigue performance of laser powder bed fusion fabricated IN625 and IN718 superalloys via shot peening

This study aims at investigating the possibility of fabricating IN625 and IN718 Ni-based superalloys with acceptable room temperature fatigue lives using the laser powder bed fusion (LPBF) process. For this purpose, several test coupons were printed and compared in terms of (i) density, (ii) tensile strength, (iii) surface roughness, and (iv) residual stress to find the optimum sets of process parameters utilized to print fatigue test …