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.
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TL;DR: In this article, the authors employed a 400-W Nd:YAG pulsed laser and 600-W continuous wave fiber laser welding to weld a 2-mm thick Hastelloy X plates.
55 citations
TL;DR: Tensile results suggested that the laser welding process had improved the weld strength even without any weld preheat treatment and also the fractography of the tensile fractured samples showed the ductile mode of failure.
55 citations
TL;DR: In this paper, the effects of various welding conditions on penetration and defect formation were investigated, and the authors clarified their welding phenomena and developed the procedure of defect formation in order to develop the defect formation procedure.
Abstract: The objectives of this research are to investigate the effects of various welding conditions on penetration and defect formation, to clarify their welding phenomena and to develop the procedure of ...
55 citations
TL;DR: A numerical model of spot pulsed current GTA welding for partially and fully penetrated weld pools is presented in this article, where heat transfer and fluid flow in the weld pool driven by the combination of electromagnetic force, buoyancy force, surface tension gradient and latent heat are included in the model.
55 citations
15 Jun 2006-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, the microstructure evolution characterizations of the joints were investigated by means of OM, SEM, XRD, TEM and the tensile strengths of the joint were tested.
Abstract: Dissimilar weld joints in Ti3Al/TC4 were welded using the electron beam (EB) process. The microstructure evolution characterizations of the joints was investigated by means of OM, SEM, XRD, TEM and the tensile strengths of the joints were tested. The microstructure of the weld metal of every joint was identical. The structures were characterized by martensite, appearing coarse equiaxed grains. There existed grain coarsening and martensitic transformation in Ti3Al/HAZ and TC4/HAZ. With the increase of heat input, the grain size was significantly raised, yet the composition of the weld metal was independent of heat input. The highest tensile strength of the joints can reach 831 MPa, equaled almost to 92% of that of Ti3Al-based alloy.
55 citations