Topic
Heat-affected zone
About: Heat-affected zone is a research topic. Over the lifetime, 18787 publications have been published within this topic receiving 231744 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a 3D finite element model with considering moving heat source was developed to simulate the welding temperature field, Δ t 8/5 time, welding residual stress and distortion in a typical thick plate joint performed by electro slag welding.
59 citations
TL;DR: In this paper, the acoustic patterns of resistance spot welding in a servo-based electrode actuation system were analyzed using time and frequency domain representations, and the welding processes can be significantly put into classes for their behaviour (weld formation) based on acoustic emissions.
Abstract: Acoustic emission reveals certain characteristic in resistance spot welding process as it exists due to the variation of electromagnetic ties between atomic bounds. So, the objective of this study is to analyse the acoustic patterns of resistance spot welding in a servo-based electrode actuation system. Time and frequency domains’ representations are interchangeably applied to analyse such matters as those behaviours are captured via electronics means. More than one type of weldable materials (carbon steels and stainless steels) is purposely used to analyse the dissimilarity conditions as well as the individual material’s welding processes. The interpreted waveform shows that the welding processes can be significantly put into classes for their behaviour (weld formation) based on acoustic emissions. A best weld formation will have perfect acoustic pattern, while a better one will have more than one main lobe in frequency domain. Moreover, a dissimilar weld formation will have inter-transient spike waveform, while an expulsion welding process will have a rapid drop of signal in acoustic pattern. All these observations have been revealing dissimilar characteristic of welding processes to certain degrees when the fusion process is concerned in resistance spot welding.
59 citations
TL;DR: In this article, the effect of small tool pin profiles on the microstructures and mechanical properties of 6061 aluminum alloy joints using friction stir welding (FSW) technique was investigated.
59 citations
TL;DR: In this article, the influence of submerged arc welding parameters and flux basicity index on the weld chemistry and transfer of elements manganese, silicon, carbon and sulphur has been investigated, five fluxes and different values of the welding parameters being used for study.
59 citations
TL;DR: In this article, an attempt has been made to determine the best welding process to hardface boiler grade steels based on quantitative factors (by measuring percentage of dilution) and qualitative factors (using the analytic hierarchy process [AHP]).
Abstract: Weld hardfacing techniques are employed mainly to extend or improve the service life of engineering components either by rebuilding or by fabricating in such a way as to produce a composite wall section to combat wear, erosion, corrosion, etc. In this paper, an attempt has been made to determine the best welding process to hardface boiler grade steels based on quantitative factors (by measuring percentage of dilution) and qualitative factors (using the analytic hierarchy process [AHP]). Five different welding processes including shielded metal arc welding (SMAW), gas metal arc welding (GMAW), gas tungsten arc welding (GTAW), submerged arc welding (SAW), and plasma transferred arc welding (PTAW) have been compared. Based on the quantitative and qualitative factors, the PTAW process is found to be the best method to hardface boiler grade steels.
59 citations