Analysis of Welding Zinc Coated Steel Sheets in Zero Gap Configuration by 3D Simulations and High Speed Imaging

Modelling of thermal fluid dynamics for fusion welding

“…The laser experiences multi-A c c e p t e d M a n u s c r i p t ple reflections before the beam escapes the cavity (Svenungsson et al, 2015), however as a first approximation the laser heat source can be provided by a three-dimensional (3D) Gaussian distribution. Geiger et al (2009) and Koch et al (2011) have successfully simulated periodic keyhole oscillations using a volume of fluid (VOF) approach. Similarly Otto et al (2011) has used the VOF method to assess the dynamics of several laser based processes including full penetration welding.…”

“…Geiger et al (2009) and Koch et al (2011) have successfully simulated periodic keyhole oscillations using a volume of fluid (VOF) approach. Similarly Otto et al (2011) has used the VOF method to assess the dynamics of several laser based processes including full penetration welding. Lee et al (2002) established a two dimensional model of a stationary laser weld using a thermal fluid flow calculation using the VOF method to demonstrate that protrusion occurs on the keyhole wall provoking keyhole collapse and void formation at the bottom of the weld during partial penetration welding.…”

Effects of laser ablation coating removal (LACR) on a steel substrate: Part 1: Surface profile, microstructure, hardness, and adhesion

“…25 Vickers microhardness values from cross-sectioned samples were obtained at a depth of 70 μm from the top surface (lased), middle (bulk material), and approximately 70 μm from the bottom surface (abrasive blasted) regions of the specimen. The reason for taking the measurements at a finite depth is that the indentation has a finite size and the volume of material, which interacts with the indenter, is even larger.…”