Laser beam welding (LBW) is one of the most important manufacturing processes used for joining of materials. It is also a remarkably complicated, nonlinear operation involving extremely high temperatures. Since its invention more than two decades ago, laser beam welding has been more of an art than a science. Laser welding of austenitic stainless steel AISI 304 the candidate material of this re...

This thesis presents the Order of Magnitude Scaling methodology and uses it to determine the con guration and dominant forces in the weld pool during high productivity arc welding. This methodology was developed to consistently address problems for which experimental and mathematical treatment is di cult, yet the governing equations and some general characteristics are known. The results genera...

A well-designed deposition path is one of the basic prerequisites for successful fabrication a component by based additive manufacturing processes. Three main approaches are currently used to determine path. First, these general templates that applied entire geometry. Nevertheless, this approach suffers from poor adaptability Second, they algorithms where it necessary divide geometry into sub-p...

this paper presents a finite element analysis and its related experimental test of corrugated steel web beams subjected to fatigue loading. a particular focus in this study was set on the fatigue failure arising from the web-to-flange welded joint of the corrugated steel web beam. a detailed three-dimensional finite element model which explicitly includes the geometry of the web-to-flange welds...

Cracking of laser hybrid welding of eccentric fillet joints has been studied for stainless steel. Laser hybrid welding enables narrow deep welds with freedom for shaping the upper weld geometry. The significance of geometrical aspects like weld toe radius, weld surface topography and lack of fusion on fatigue cracking is discussed. Constant amplitude four point bending tests, S/N-curve, topogra...

Tungsten Inert Gas (TIG) welding is otherwise known as the Arc soldering (GTAW) process which when significant levels of weld quality or high precision are required, to represent an advanced arc process. However impact factors on this form important for its produced in single-pass welding. In investigation, autogenous was performed a carbon mild steel plate with four parametric variables. High ...

A three-dimensional (3D) finite element (FE) model is applied to predict the temperature evolution in the laser welding of galvanized high-strength steels in a zero-gap lap joint configuration. A rotary Gaussian volumetric heat source model is introduced to simulate the laser energy input. The temperature data measured by thermocouples are used to verify the boundary conditions of the thermal m...