Microplasma welding is a less expensive alternative to laser welding in dental technology. The aim of the study was to highlight discontinuities present in the microplasma welded joints of dental base metal alloys by visual analysis. Five base metal alloys designated for fixed prostheses manufacture were selected for the experiments. Using these plates, preliminary tests were conducted by micro...

Impact toughness of a gas tungsten arc welded Ti /6Al /4V alloy butt-joint was evaluated at room temperature using standard Charpy V-notch specimens. The Charpy specimens were prepared with notch roots located either in the parent metal, in the heataffected zone (HAZ), or in the weld metal. Optical metallography and Vickers microhardness test showed that the weld metal has the coarsest grains a...

Abstract The microstructure and properties of high nitrogen stainless steel welded joints under different flash currents were studied by butt welding. results show that, the welding parameters have obvious influence on joint structure mechanical properties. is organized into symmetrical distribution, grains obtained in interface area are small, mostly pearlite ferrite. With increase current, gr...

Butt-welded joints are common in many industries. The fatigue behavior of such depends on numerous factors, e.g. load level, local weld geometry, or parent material strength. To make things worse, these factors often interact, yet mutual influence can hardly be quantified by multivariate studies, i.e. varying one factor at a time out due to the large number required tests and statistical nature...

It is well known that the residual stress of the friction-stir-welded joint affects the fatigue strength and life, and the corrosion performance. In this paper, a three-dimensional finite element model is established to study the thermal history and stress evolution in the butt welding of aluminium alloy 6061-T6, which will comprehensively provide insight into the friction-stir-welding process....

This work studies the Voce–Chaboche (V–C) material model parameter optimization for high-strength steel welded joints subjected to cyclic loading. The parameters of each zone in a S690 butt-welded joint were determined using an algorithm based on Newton trust region (NTR) method and accumulated true strain parameter. fitted stress–strain histories from uniaxial strain-controlled tests. To valid...