A novel post-processing approach towards improving hole accuracy and surface integrity in laser powder bed fusion of IN625

Laser powder bed fusion (LPBF) has been widely used to manufacture intricate geometries that would otherwise be costly to conventionally manufacture due to the complexity of design and the hard-to-machine nature of Ni-based superalloys such as IN625. However, the advantage of LPBF is opposed by the formation of high tensile residual stresses (RS), poor surface quality, and dimensional accuracy, which would require several post-processes to …