Results 21 to 30 of about 908 (188)

Achieving polycrystalline transformation and microstructural segregation reduction of nickel-based single crystal super-alloys by ultrasonic pulse arc welding

open access: yesJournal of Materials Research and Technology, 2023
The sub-grains coarsening and low melting point eutectic are the internal causes of cracking of single crystal super-alloys in welding. Aiming to overcome two internal causes, in this paper, the effect of ultrasonic pulse arc welding on the grains, sub ...
Yajie Wang   +7 more
doaj   +1 more source

Using Taguchi method to optimize welding pool of dissimilar laser welded components [PDF]

open access: yes, 2008
In the present work CO2 continuous laser welding process was successfully applied and optimized for joining a dissimilar AISI 316 stainless steel and AISI 1009 low carbon steel plates. Laser power, welding speed, and defocusing distance combinations were
Anawa, E., Olabi, Abdul-Ghani
core   +1 more source

Technology of thermal welding with ultrasonic weld joint treatment as applied to NPP formworks

open access: yesNuclear Energy and Technology, 2017
Increasing the strength, reliability and durability of welded structures is an important problem in welding engineering. A significant influence is exerted by residual stresses.
S.I. Minin
doaj   +1 more source

Mechanism and Influencing Factors of Frictional Energy Dissipation in Multilayer Ultrasonic Welding

open access: yesShanghai Jiaotong Daxue xuebao, 2022
In multilayer ultrasonic welding, the sonotrode presses on metal sheets and drives the sheets to produce ultrasonic vibration. Then, each contact interface generates heat, produces plastic deformation, and forms solid-state bonding.
MA Zunnong, ZHANG Yansong, ZHAO Yixi
doaj   +1 more source

Investigation on welding defects of alloys using TIG and MIG welding

open access: yesHybrid Advances, 2023
This study is to look at the welding procedures of tungsten inert gas (TIG) and metal inert gas (MIG). This study focuses on welding flaws with different types of welding joints for AISI-1020 mild steel when welding with tungsten inert gas (TIG) and ...
Syed Rashedul Haque
doaj   +1 more source

The Effect of Ultrasonic Energy on Joint Characterization in Ultrasonic Spot Welding Multilayer Tabs Used in Lithium-ion Battery Manufacturing [PDF]

open access: yesMATEC Web of Conferences, 2019
Lithium-ion battery for electric vehicles contains a large number of battery tabs with multiple and thin sheets. Dissimilar metals are often used for different electrodes, for example, the copper and nickel are often used for negative electrode and the ...
Ma Z.N., Zhang Y.S.
doaj   +1 more source

Effect of Arc Behaviour and Metal Transfer Process on Aluminium Welds during Ultrasonic Frequency Pulsed GMAW

open access: yesCrystals, 2022
In order to study the influence of a novel current waveform control method of ultrasonic-frequency pulse (UFP) on arc behaviour, metal transfer process and the welds formation, monitoring system and image processing algorithms were employed for ...
Hao Zheng   +3 more
doaj   +1 more source

Study on ultrasonic regulation of the welding performance and defects of 7A52 aluminum alloy plate

open access: yesAIP Advances, 2022
The welding performance and defects of thick aluminum alloy plates with medium and high strength are always a hot research topic. In this study, ultrasonic technology was used to regulate the properties and defects of welded joints of a 7A52 aluminum ...
Peng Yin   +4 more
doaj   +1 more source

The Effect of Power Ultrasound on Microstructure Evolution During the Transient Liquid Stage of Ultrasonic-Promoted TLP Bonding SiCp/Al MMCs [PDF]

open access: yesArchives of Metallurgy and Materials, 2022
Ultrasound-promoted transient liquid phase bonding (U-TLP) is a high quality, high efficiency, and low-cost method for fast bonding of difficult-wetting materials in the atmospheric environment.
Changzhuang Zhou   +5 more
doaj   +1 more source

Influence of Single-Sided Ultrasonic Assistance on the Double-Sided Welding Forming Quality of Q355 Thin Plates

open access: yesMetals
To solve the problems of large deformation and poor welding quality commonly observed during the double-sided welding of Q355 thin plates, this study systematically investigated the effects of single-sided ultrasonic-assisted welding on the weld ...
Peng Yin   +5 more
doaj   +1 more source

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