Topic
Butt welding
About: Butt welding is a research topic. Over the lifetime, 7153 publications have been published within this topic receiving 44467 citations.
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TL;DR: In this article, the results of extensive measurements on weld toe geometry of as-welded and TIG-dressed butt welded connections in high strength steels S460, S690 and very high strength STEels S890 and S1100 are presented.
28 citations
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26 Nov 1934
TL;DR: In arc welding, the operator may frequently be located a considerable distance from the generator which supplies current through a flexible cable to the welding electrode that is manually r, guided by the operator as discussed by the authors.
Abstract: In arc welding, the operator may frequently be located a considerable distance from the generator which supplies current through a flexible cable to the welding electrode that is manually r, guided by the operator. Most welding-current generators embody an adjustment for controlling the welding...
28 citations
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TL;DR: In this paper, the authors investigate the low-temperature fatigue crack propagation behavior of Q345qD bridge steel base material and its butt welds, and show that the crack propagation threshold for a welded joint is lower than that for fracture in the base material while the weld metal exhibits an opposite trend.
Abstract: Steel bridges fabricated with Q345qD steels face critical challenges when operating in cold regions with a low ambient temperature. This study aims to investigate, via an experimental program, the low-temperature fatigue crack propagation behavior of Q345qD bridge steel base material and its butt welds. The testing program comprises a series of Charpy impact tests and fatigue crack propagation tests at the room temperature, −20°C and −60°C. The experimental results demonstrate a reduced crack propagation rate in the base material, but an increasing crack propagation rate in the butt welds, with a decreasing ambient temperature. The base material also shows enhanced fatigue crack propagation thresholds with the decreasing temperature. The ductile-to-brittle transition temperature for fatigue is lower than that for fracture in the base material while the weld metal exhibits an opposite trend. Generally, the butt welds present higher resistance against fatigue crack propagation and larger Charpy toughness values than do the base material at all tested temperatures. The Paris-law parameters measured at the room temperature for the base material leads to a conservative assessment of the crack propagation life for a welded joint under a low ambient temperature.
28 citations
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05 Oct 1935TL;DR: In this paper, a system for controlling the welding and cutting of metals is described, which is a continuation in part of application Serial No. 542,963, filed June 8, 1931.
Abstract: " This invention relates to systems for controlling the welding and cutting of metals, and constitutes a continuation in part of application Serial No. 542,963, filed June 8, 1931. In the fusion welding of metals by means of the oxyacetylene flame or the electric arc, as in production or machine...
27 citations