Influence of Laser Shock Peening on Wire Arc Additive Manufactured Low Carbon Steel

Abstract

This paper attempts to investigate the effect of laser shock peening on mild steel structures developed by Wire Arc Additive Manufacturing (WAAM). This process has employed in fabricating the desired samples with an argon environment which has a feed rate of 15 cm/min, 16 V, 80 A, argon flow pressure and wire diameter 1.2 mm. Nd-YAG pulsed laser source has used for the shock peening process with the wavelength of 532 nm and power of 2 W. The optical microscope images represent microstructure of the surface before and after laser shock peened samples. The sample shows uniform grain refinement and reduced pores level after laser shock peening. Further X-ray diffraction has used for analyzing the confirmation of crystalline phase and structures in detail. © 2019, Springer Nature Singapore Pte Ltd.