Welding, Joining and Additive Manufacturing International Conference 2015

Low transformation temperature welding (LTTW) consumables have been reported to reduce the tensile residual stresses in weldments. Martensitic transformation induces compressive residual stresses and improves the fatigue resistance of welded joints. Several of these LTTW consumables have been developed at Colorado School of Mines. This research work presents the comparisons of the experimentally and Sysweld calculated measurements for distortions and residual stresses for different plate thicknesses. Of particular importance are the residual stress evolution with time graphs plotted to determine the amount of martensite required to promote compressive residual stresses and to calculate the time required to induce compressive residual stresses. The main aspect of this research is to analyze the behavior of Low Transformation Temperature Welding consumables in terms of distortion and residual stresses on various plate thicknesses. It represents a summary of work and results developed by seven research students and visiting researchers at the Colorado School of Mines.