Journal ArticleDOI
Effect of pulsed ultrasonic on arc acoustic binding in pulsed ultrasonic wave-assisted pulsed gas tungsten arc welding
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In this paper, the effect of pulsed ultrasonic wave-assisted pulsed gas tungsten arc welding was investigated and the results indicated that arc contraction degree, weld pool oscillation, and weld penetration were remarkably enhanced by applying pulsed Ultrasonic.Abstract:
This paper investigated the effect of pulsed ultrasonic on the microstructure and mechanical properties of weld joints using novel pulsed ultrasonic wave-assisted pulsed gas tungsten arc welding. The principle of proposed method was to apply pulsed ultrasonic to the welding process during background current. The results indicated that arc contraction degree, weld pool oscillation, and weld penetration were remarkably enhanced by applying pulsed ultrasonic. The microstructure refined by pulsed ultrasonic was much finer than those refined by continuous ultrasonic due to the more stable ultrasonic field in arc zone and consequent stronger fluid flow in weld pool. Furthermore, tensile strength of the joints with pulsed ultrasonic was significantly improved compared with that of the joints with no and continuous ultrasonic.read more
Citations
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Enhanced arc-acoustic interaction by stepped-plate radiator in ultrasonic wave-assisted GTAW
TL;DR: In this article, the performance of the stepped-plate radiator configuration with varying height and diameter was compared through different physical and welding experiments, and the authors verified the maximum acoustic pressure in arc burning zone, consistent with experiments that the maximum constriction degree of welding arc indeed exists in practice.
Journal ArticleDOI
Investigation of acoustic radiator affecting bubble-acoustic interaction in ultrasonic wave-assisted UWW at shallow water
TL;DR: In this article, an acoustic radiator with a concave surface has been designed in order to investigate the effect of curvature radius on the bubble-acoustic interaction and the results indicated that stable bubble can be more easily achieved in U-UWW because it minimizes the extent of undesirable bubble evolution occurring in an erratic and time-varying behavior.
Journal ArticleDOI
Weld structure of low-carbon structural steel formed by ultrasonic-assisted laser welding
TL;DR: In this article, the authors examined the structure of a welded joint of low-carbon structural steel A 516-55 formed by melting under laser irradiation and by subsequent melt solidification.
Journal ArticleDOI
Effect of ultrasonic vibration of molten pool on microstructure and mechanical properties of Ti-6Al-4V joints prepared via CMT + P welding
TL;DR: In this article, a tungsten needle with ultrasonic vibration was inserted into the front side of weld pool to stir the molten pool, thereby refining the grains and improving the tensile properties of weld joint.
References
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Journal ArticleDOI
Grain refining by ultrasonic stirring of the weld pool
Tao Yuan,Sindo Kou,Z. Luo +2 more
TL;DR: In this paper, an ultrasonic grain refining method was proposed to improve the mechanical properties and solidification-cracking resistance of arc welds of Mg alloys AZ31 Mg and AZ91 Mg.
Journal ArticleDOI
Keyhole gas tungsten arc welding of AISI 316L stainless steel
TL;DR: In this paper, a keyhole gas tungsten arc welding (K-TIG) was used to weld AISI 316L stainless steel of mid-thickness.
Journal ArticleDOI
Improvement of mechanical properties of ferritic stainless steel weld metal by ultrasonic vibration
TL;DR: In this article, the authors investigated the effect of ultrasonic vibration on the solidification microstructure and mechanical properties of the weld metal of ferritic stainless steel by introducing directly ultrasonic vibrations into the weld molten pool using ultrasonically vibrating filler metal.
Journal ArticleDOI
Improving arc joining of Al to steel and Al to stainless steel
TL;DR: In this paper, an Al-Mg alloy was joined to 304 stainless steel using a Zn-15Al filler metal with a noncorrosive flux core, and the weld solidification microstructure was explained based on the Al-Zn−Mg phase diagram.