Topic
Filler metal
About: Filler metal is a research topic. Over the lifetime, 11152 publications have been published within this topic receiving 86590 citations.
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TL;DR: In this article, a research investigation has been undertaken to identify the various stages and variation of welding parameters in friction taper plug welding (FTPW) process and to explore their effects on the performance and properties of the welds.
35 citations
Patent•
22 Jul 1995
TL;DR: A welding process in which laser radiation is trained on the seam area between two sheet-metal workpieces, one of which has an edge projecting above the other, is described in this paper.
Abstract: A welding process in which laser radiation is trained on the seam area fod between two sheet-metal workpieces, one of which has an edge projecting above the other In addition, the arc is guided along this edge to melt the edge and contribute molten metal to the pool formed by the laser
35 citations
TL;DR: In this paper, a space-time finite element method (FEM) is proposed to solve the transient convection-diffusion thermal equation of welds, which is suitable for the thermal analysis in the weld pool or/and weld joint region including starting and stopping transients.
35 citations
TL;DR: In this article, the effect of BN content, brazing temperature and time on the microstructure and mechanical properties of the brazed joints was investigated, and the results showed that a continuous reaction layer formed adjacent to the SiO 2 -BN ceramic and Ti plate, whose thickness played a key role in the bonding properties.
35 citations
Journal Article•
TL;DR: In this paper, a hot-cracking mitigation technique for gas tungsten arc welding (GTAW) of high-strength aluminum alloy 2024 is presented, which incorporates a trailing heat sink (an intense cooling source) with respect to the welding torch.
Abstract: A hot-cracking mitigation technique for gas tungsten arc welding (GTAW) of high-strength aluminum alloy 2024 is presented. The proposed welding technique incorporates a trailing heat sink (an intense cooling source) with respect to the welding torch. The development of the mitigation technique was based on both detailed welding process simulation using advanced finite element techniques and systematic laboratory experiments. The finite element methods were used to investigate the detailed thermomechanical behavior of the weld metal that undergoes the brittle temperature range (BTR) during welding. As expected, a tensile deformation zone within the material BTR region was identified behind the weld pool under conventional GTA welding process conventional GTA welding process conditions for the aluminum alloy studied. To mitigate hot cracking, the tensile zone behind the weld pool must be eliminated or reduce to a satisfactory level if the weld metal hot ductility cannot be further improved. With detailed computational modeling, it was found that by the introduction of a trailing heat sink at some distance behind the welding arc, the tensile strain rate with respect to temperature in the zone encompassing the BTR region can be significantly reduced. A series of parametric studies were also conducted to derive optimal processmore » parameters for the trailing heat sink. The experimental results confirmed the effectiveness of the trailing heat sink technique. With a proper implementation of the trailing heat sink method, hot cracking can be completely eliminated in welding aluminum alloy 2024 (AA 2024).« less
35 citations