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 paper, the authors used infrared joining of Ti-48Al-2Nb-2Cr alloy for brazing filler metal at the temperature range of 1100∼1200°C for 30∼60 s in a flowing argon environment.
40 citations
TL;DR: In this article, an attempt has been made to refine the fusion zone grains by applying pulsed current welding technique, which leads to relatively finer and more equi-axed grain structure in gas tungsten arc (GTA) and gas metal arc welding (GMA) welds.
40 citations
Patent•
02 May 2013TL;DR: An aluminum alloy brazing sheet is used for inexpensively braze aluminum in a nitrogen gas furnace without using flux and a toxic element as discussed by the authors, which makes it possible to inexpensively bead aluminum in an inert gas atmosphere.
Abstract: An aluminum alloy brazing sheet makes it possible to inexpensively braze aluminum in a nitrogen gas furnace without using flux and a toxic element The aluminum alloy brazing sheet is used for brazing aluminum in an inert gas atmosphere without using flux, and includes a core material and a filler metal, one side or each side of the core material being clad with the filler metal, the core material being formed of an aluminum alloy that includes 02 to 13 mass % of Mg, and the filler metal including 6 to 13 mass % of Si and 0004 to 01 mass % of Li, with the balance being aluminum and unavoidable impurities
40 citations
15 Jul 2015-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effect of brazing temperature on the interfacial microstructure and mechanical properties of ZrO2/TiAl joints were investigated, and the results indicated that the representative micro-structure of the joint was TiAl alloy.
Abstract: Reliable brazing of ZrO2 ceramic and TiAl alloy was achieved using inactive AgCu filler metal. The effect of brazing temperature on the interfacial microstructure and mechanical properties of ZrO2/TiAl joints were investigated. The results indicated that the representative microstructure of the joint was TiAl alloy/γ-TiAl/AlCuTi/AlCu2Ti/Ag(s,s)+AlCu2Ti+AlCu4/Cu3Ti3O+TiO/ZrO2 ceramic. With increasing brazing temperature, the thickness of reaction zone adjacent to TiAl substrate and continuous reaction layers next to ZrO2 ceramic increased obviously. In addition, the AlCu2Ti particle phase coarsened and aggregated in brazing seam at higher temperature. The Ti and Al dissolved from TiAl substrate have an enormous effect on microstructure evolution of ZrO2/TiAl joints and the mechanism is discussed. The maximum average shear strength reached 48.4 MPa when brazed at 880 °C for 10 min.
40 citations
TL;DR: In this paper, an on-line coaxial monitoring system with an auxiliary illuminant was built for the fiber laser welding of galvanized steel; images of the weld pool were taken during the welding process.
Abstract: In the laser welding process, weld defects are often caused by many factors, such as variations in the laser power, welding speed and gaps between two workpieces. In an auto-welding system, the on-line monitoring of the welding quality is very important in avoiding weld defects. In this paper, an on-line coaxial monitoring system with an auxiliary illuminant was built for the fibre laser welding of galvanised steel; images of the weld pool were taken during the welding process. Profiles of the weld pool and the keyhole were obtained by processing the images using the region-growing algorithm and the Canny algorithm. In this research, we used the on-line monitored weld pool width to monitor the weld surface width. The weld penetration status was divided into the three categories of incompletely penetrated, moderately penetrated and over-penetrated using the value of d (diameter at the bottom of the keyhole)/D (diameter at the top of the keyhole). Thus, the weld width and weld penetration status of fibre laser welding can be monitored on-line.
40 citations