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Showing 1 to 20 of 22 for “"Welding processes"”.
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Measurement and finite element modelling of temperatures in welding processes
Out-of-plane welding distortion has been a persistent problem in welding industries. In order to find solutions for such a problem, substantial experimental and computer modelling work on residual stresses and out-of-plane distortion analysis need to be carried out. Such computer modelling requires …
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Numerical simulation of friction welding processes: An arbitrary Lagrangian-Eulerian approach
… contact for numerical simulation of friction welding processes are described. A finite strain associative coupled thermoplasticity model is used, which is suited for the large deformations characteristic of friction welding processes, and which resolves the viscoplastic deformations in the …
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Joining aluminum alloy 5083 to type 304L stainless steel using non-welding processes
Includes bibliographical references (pages 114-118).
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Joining aluminum alloy 5083 to type 304L stainless steel using non-welding processes
Includes bibliographical references (pages 114-118).
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The fatigue of welded butt joints in low carbon steel
A survey has been made of the developments of welding processes and the literature concerned with the fatigue resistance of butt welded joints. Evident from the literature survey was the fact that a mass of experimental data was available on the fatigue properties of welds yet many fatigue failures …
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Mechanical and microstructural properties of ultra-low carbon bainitic steel weld metal
… Gas Tungsten Arc (GTA) and Gas Metal Arc (GMA) welding of Navy high strength (100 ksi) steels. In the present work, a candidate ULCB weld wire was investigated for GTA and GMA welding processes as a function of both welding power and cover gas. The strength and Charpy V-notch toughness of the …
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Optimization of Rib-To-Deck Welds for Steel Orthotropic Bridge Decks
… different weld dimensions, penetrations, and welding processes. Fatigue tests were performed to 95 full-scale single-rib deck segments in 8 specimen series fabricated with different welding processes and root gap openness. Specimens were tested under cyclic loads till failure. Three failure …
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Development of a real-time ultrasonic sensing system for automated and robotic welding
The implementation of robotic technology into welding processes is made difficult by the inherent process variables of part location, fit up, orientation and repeatability. Considering these aspects, to ensure weld reproducibility consistency and quality, advanced adaptive control techniques are …
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Online tool condition monitoring for ultrasonic metal welding via sensor fusion and machine learning
Ultrasonic metal welding (UMW) is an important manufacturing process used for joining multi-layer, thin and conductive metals. In UMW, tool wear significantly affects the weld quality and tool maintenance constitues a substantial part of production cost. Thus, tool condition monitoring (TCM) is …
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Investing in quality : identifying the true value of advanced weld inspection technology
… Due to the inherently variable nature of arc welding, non-destructive weld evaluation is critical to ensure that welding processes remain in control, and that defective parts are quarantined and repaired before being released downstream. The "conventional" ultrasonic weld inspection technology …
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Real time defect detection in welds by ultrasonic means
… to detect weld defects ultrasonically whilst welding is in progress. This system, including a flash analogue to digital converter and built-in memories to store sampled data, a peak characters extractor and a welding process controller, enabled welding processes to be controlled automatically …
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A Torque Based Power Input Model for Friction Stir Welding
… structures. The basis for these models is the welding heat input, which is fairly well understood for most arc welding processes. However, this traditional approach is not as straightforward for Friction Stir Welding (FSW). To date, there is no definitive relationship to quantify the heat input …
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Mechanical and metallurgical properties of dissimilar metal joints using novel joining techniques
… there have been significant new developments in welding processes for joining stainless steel and dissimilar metals. This is associated with the rise in interest of using stainless steel in the automotive industry from both car manufacturers and stainless steel producers. The main reason for …
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Applied modelling techniques for welding induced distortions and residual stresses
… of residual stresses and distortion induced by welding is relevant to many industries involved with the manufacture and assembly of thin plate structures. The ability to predict these unwanted effects on such structures subjected to welding processes is important to minimise costs associated …
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Exothermic flux forge welding of steel tubulars
Welding processes inevitably alter the local microstructure and in turn affect the properties. For many grades of steels that require high strength, ductility, and toughness, it is difficult to maintain this combination of properties after welding. While full part heat treatments can sometimes be …
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Modeling of Residual Stress in Thick Section Weldments
Welding processes produce residual stresses and distortion as a result of the large nonlinear thermal loading created by the arc. Cracking and lamellar tearing have been experienced just after welding and later during the intended service life. Particularly, tensile residual stresses in regions …
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Effects of Friction Stir Welding on Polymer Microstructure
… relationships between several key Friction Stir Welding process parameters and the resulting microstructural and flexural properties of the welded joint. A series of four single parameter experiments were run. The parameters investigated were pin diameter, feedrate, shoe temperature, and pressure …
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Phase transformations in welded supermartensitic stainless steels
… applications. Although easily joined by arc welding processes, the service life of the supermartensitic welded joint in corrosive environments relies to a large extent on the behaviour of the heat-affected zone (HAZ). The microstructure of the HAZ in these new materials has, until now, …
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MODELING AND TESTING OF WELDED STRUCTURAL JOINTS MACHINED WITH LASER CUTTING TECHNOLOGY
… thesis focuses on the impact of using different welding techniques on the performance and failure mechanisms of Hollow Structural Section (HSS) joints manufactured by Laser Cutting Technology (LCT). In mid-high-rise steel structures, Circular or Rectangular Hollow Structural Sections (CHS/RHS) …
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Optimisation of automated gas metal arc fillet welding
Gas Metal Arc Welding (GMAW) has been one of the most widely used industrial welding processes since around the middle of the 20th Century. However, the large number of input parameters and variables makes it extremely challenging to understand exactly what impact the variation of each of the …
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