Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
EXPLORATORY INVESTIGATION ON RESIDUAL STRESS AND DISTORTION OF 20MnCr5 CARBURIZING STEEL PROCESSED BY LASER POWDER BED FUSION
Submission Author:
Denis Lima , SP
Co-Authors:
Lucas Robatto, Ronnie Rego, Anderson Vicente Borille, José Maria Mascheroni, Arthur Raulino Kretzer
Presenter: Lucas Robatto
doi://10.26678/ABCM.COBEM2021.COB2021-0856
Abstract
New demands of the automotive transmission industry require solutions that the additive manufacturing technique of laser powder bed fusion (L-PBF) presents potential to provide. However, knowledge on the surface integrity induced by the L-PBF process is still incipient for residual stress (RS) and distortion control for transmission applications, important aspects for proper fatigue resistance and dimensional quality assurance. In this work, an exploratory investigation on the RS and distortion dependence on the hatch spacing and laser power of L-PBF with 20MnCr5 carburizing steel was conducted. RS and topography maps of L-PBF specimens processed with different parameters were obtained through X-ray diffractometry and profilometry, respectively. Larger hatch spacing was related to reduced residual stress heterogeneity and lower distortion effects, but higher FWHM of the diffraction profiles. The findings contribute for the technological maturity of L-PBF introducing new aspects to be considered in parameters optimization.
Keywords
Additive manufacturing, X-ray Diffraction, heterogeneity, topography, gears
