@misc{10498/28654,
year = {2022},
month = {11},
url = {http://hdl.handle.net/10498/28654},
abstract = {Root pass is a fundamental step in multi-pass welding. In gas metal arc welding (GMAW), the weld bead qualities depend on the process parameters, filler materials, and welder abilities. This work investigates the effect of a Nd: YAG pulsed laser as a first pass to reduce the welders' reliance on the AH36 low-alloy steel with 5.5 mm thickness. This autogenous automatable process delivers reduced thermal impact due to the concentrated high-energy source, pulse overlap, and higher penetration depth-to-power ratio than continuous lasers. The outcomes indicate that the PL as a root welding generated a small HAZ compared to the GMAW condition. In addition, the subsequent arc passes positively affected the microstructure, reducing the hardness from around 500 to 230 HV. The PL + GMAW achieved similar strength results to the GMAW, although its Charpy impact values at -50 degrees C were around 15% lower than the arc condition.},
organization = {This work was financial supported from the Program for the Promotion and Impulse of Research and Transfer of the University of Cadiz (Reference project: IRTP02_UCA).},
publisher = {MDPI},
keywords = {gas metal arc welding},
keywords = {pulse laser welding; root pass},
keywords = {AH36 steel},
keywords = {microstructure},
keywords = {mechanical properties},
title = {Low-Energy Pulsed-Laser Welding as a Root Pass in a GMAW Joint: An Investigation on the Microstructure and Mechanical Properties},
doi = {10.3390/ma15217741},
author = {Chludzinski, Mariane and Dos Santos, Rafael Eugenio and Ortega Iguña, Marta and Churiaque Bermejo, Cristina and Porrúa Lara, Manuel and Sánchez Amaya, José María},
}