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Article
Microstructure and Mechanical Properties of Dissimilar Double-Side Friction Stir Welds Between Medium-Thick 6061-T6 Aluminum and Pure Copper Plates
It is difficult to achieve Al/Cu dissimilar welds with good mechanical properties for medium-thick plates due to the inherent high heat generation rate at the shoulder-workpiece contact interface in convention...
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Article
Effect of leading ultrasonic vibrations on the welding forces of friction stir lap welding
Influence of leading ultrasonic vibrations on the process forces in the friction stir lap welding of AA 6061-T6 with and without ultrasonic vibrations is investigated at varied welding speeds. The axial force,...
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Article
A Meshless Finite Difference Method Based on Polynomial Interpolation
The finite difference (FD) formula plays an important role in the meshless methods for the numerical solution of partial differential equations. It can be created by polynomial interpolation, however, this ide...
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Article
Effect of ultrasonic vibration on welding load, macrostructure, and mechanical properties of Al/Mg alloy joints fabricated by friction stir lap welding
An initial study is proposed in order to evaluate the outcomes of ultrasonic vibration in friction stir welding of Al and Mg alloys for lap configuration. A novel ultrasonic assembly is designed and developed ...
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Article
Analysis of welding load reduction in ultrasonic vibration-enhanced friction stir welding
A novel process variant of friction stir welding (FSW), i.e., ultrasonic vibration-enhanced FSW (UVeFSW), has been developed to improve the joint quality and lower the welding loads. To elucidate the underlyin...
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Article
Numerical analysis of heat transfer and fluid flow characteristics and their influence on bead defects formation in oscillating laser-GMA hybrid welding of lap joints
In this study, the accuracy of the model developed for oscillating laser-GMA hybrid welding has been improved by integrating more experimentally measured parameters, such as the droplet velocity, transient arc...
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Article
Analysis of the dynamic performance of a complex ultrasonic horn for application in friction stir welding
Simple and complex ultrasonic horns used in ultrasonic vibration-assisted friction stir welding are designed and analyzed using the finite element method. Modal analysis of the designs shows that the computed ...
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Article
Effects of process parameters on weld bead defects in oscillating laser-GMA hybrid welding of lap joints
The oscillating laser-GMA hybrid welding tests with lap joint configuration were conducted to observe the behaviour of welding arc, metal transfer and weld pool. Temperature distribution in the resultant lap j...
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Article
Effects of DCK knockdown on proliferation, apoptosis and tumorigenicity in vivo of cervical cancer HeLa cells
The present study explored the effect that deoxycytidine kinase (DCK) knockdown had on proliferation, apoptosis and tumorigenicity in vivo of cervical cancer HeLa cells. Human cervical cancer HeLa cells that had ...
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Article
Transient variation of arc heat flux and pressure distribution on keyhole wall in PAW
A mathematical model of plasma arc welding is developed to numerically simulate the transient variation of plasma arc heat flux and pressure distribution on the curved keyhole wall. As the keyhole evolves from...
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Article
Deletion of G-protein-coupled receptor 55 promotes obesity by reducing physical activity
Cannabinoid receptor 1 (CB1) is the best-characterized cannabinoid receptor, and CB1 antagonists are used in clinical trials to treat obesity. Because of the wide range of CB1 functions, the side effects of CB...
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Chapter and Conference Paper
Modeling and Simulation of High Efficiency Welding Processes
Nowdays manufacturing industry needs further research and development of high efficiency welding processes. To meet this challenge, keyhole plasma arc welding and laser-gas metal arc hybrid welding are demande...
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Article
Map** forested wetlands in the Great Zhan River Basin through integrating optical, radar, and topographical data classification techniques
Knowledge of the spatial extent of forested wetlands is essential to many studies including wetland functioning assessment, greenhouse gas flux estimation, and wildlife suitable habitat identification. For dis...
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Article
Analysis of heat transfer and material flow in reverse dual-rotation friction stir welding
Reverse dual-rotation friction stir welding (RDR-FSW) is a novel variant of conventional FSW process. The key feature is that the tool pin and the assisted shoulder rotate reversely and independently during th...
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Article
Open AccessDecline of Yangtze River water and sediment discharge: Impact from natural and anthropogenic changes
The increasing impact of both climatic change and human activities on global river systems necessitates an increasing need to identify and quantify the various drivers and their impacts on fluvial water and se...
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Article
Dynamic variation of keyhole exit and its inclination in plasma arc welding
The dynamic behavior of keyhole in plasma arc welding determines the weld quality. In this study, the keyhole images are observed during the process, and both the keyhole geometry and its position relative to ...
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Article
Numerical simulation of plasma arc welding with keyhole-dependent heat source and arc pressure distribution
A three-dimensional and transient model with keyhole geometry-dependent heat source and arc pressure distribution is developed for plasma arc welding process. The influence of the keyhole evolution on heat flu...
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Article
Numerical analysis of heat generation and temperature field in reverse dual-rotation friction stir welding
A 3D model is developed for numerical analysis for heat generation, temperature field, and material flow in reverse dual-rotation friction stir welding (RDR-FSW) process. The reverse rotation of the assisted s...
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Article
Modeling the Material Flow and Heat Transfer in Reverse Dual-Rotation Friction Stir Welding
Reverse dual-rotation friction stir welding (RDR-FSW) is a novel modification of conventional friction stir welding (FSW) process. During the RDR-FSW process, the tool pin and the assisted shoulder are separat...
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Article
Experimental sensing of the keyhole exit deviation from the torch axis in plasma arc welding
Sensing the dynamic behavior of the keyhole is of great significance to control and ensure the process quality and the resultant weld quality in plasma arc welding (PAW). Usually, the keyhole size is used as t...
