Welding in the World
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Heat input control in horizontal lap joint welding through active wire preheating in GMAW-P
Welding in the World - Tập 68 Số 4 - Trang 893-904 - 2024
Micro-Magnetic Evaluation of Micro-Residual Stresses of the IInd and IIIrd Orders
Welding in the World - Tập 56 - Trang 29-34 - 2013
Micro-residual stresses (MRS) of the IInd and IIIrd orders play an important role in the fracture mechanical analysis of thermally-cycled materials and thus in lifetime analysis of such affected components. In multi-phase materials there can exist two kinds of MRS: thermally-induced MRS of the IInd order and coherent MRS of the IIIrd order. The first appear when individual material phases exhibit ......
Experimental simulation of dissimilar weld metal of high manganese steels by arc melting technique
Welding in the World - Tập 61 - Trang 249-256 - 2017
This paper presents an arc melting technique that allows simulating dissimilar weld metal of high manganese steels with ferritic and martensitic steel grades. The objective of this initial study was to conceive a melting technique that produces dissimilar metal welds using a GTA process in a water-cooled copper crucible under welding adequate cooling conditions and with homogeneous mixing. For thi......
Experimental study of arc bubble growth and detachment from underwater wet FCAW
Welding in the World - Tập 63 - Trang 1747-1759 - 2019
The bubble around the arc burning zone, defined as arc bubble, is the key factor to affect the process stability and joint quality in underwater wet welding. In this study, visual sensing of the bubble growth and detachment based on a high-speed camera in conjunction with a dysprosium lamp was realized. The extracted boundaries of a growing arc bubble were obtained via an image processing of the c......
Health and Safety in Fabrication and Repair of Welded Components: Aspects, Impacts and Compliance with Regulations
Welding in the World - Tập 53 Số 5 - Trang 28-34 - 2009
The evaluation of the aspects of health and safety of welding fabrication and repair activities is rather complex, because of the great number of disciplines involved. An attempt at classification of these aspects will be proposed, dividing them into physical aspects — including radiation, heat, noise, electrical dangers, electromagnetic fields and work environment conditions, and chemical aspects......
Microstructure and mechanical properties characterization of aged and repair welded Alloy 617M
Welding in the World - Tập 67 - Trang 1155-1168 - 2023
A chemistry-controlled variant of nickel-based Alloy 617 (UNS N06617) designated as Alloy 617M is the candidate structural material for superheater header and tubing and high pressure and intermediate pressure steam turbines for Indian advanced ultra-supercritical (AUSC) coal-fired thermal power plant mission program. This study evaluates the effect of ageing due to service exposure on microstruct......
Factors influencing the fiber orientation in welding of fiber-reinforced thermoplastics
Welding in the World - Tập 62 - Trang 997-1012 - 2018
In welding of fiber-reinforced thermoplastics, the welding pressure initiates squeeze flow of melt into the weld bead. This leads to reorientation of fibers into the flow direction. Therefore, the fibers in the weld are mainly oriented perpendicular to the joining direction. Since this is mostly identical to the load direction, the reinforcing effect of fibers is not effective in the weld because ......
Effect of welding parameters on the microstructure and mechanical properties of the friction-welded dissimilar joints of AA6063 alloy and faying surface-tapered AISI304L alloy
Welding in the World - Tập 64 - Trang 483-499 - 2020
Mechanical bonding between dissimilar metals is challenged due to the differences in their properties. In this paper, the influence of tapering in friction welding (FW) between AA6063 and AISI304L and the effect of welding parameters are investigated to obtain quality joints. Different experiments were carried out for this study with main influencing parameters such as upset pressure (UP), frictio......
Effect of electromagnetic stirring on microstructure formation in 12%Ni steel ESW weld metal
Welding in the World - Tập 67 - Trang 141-149 - 2022
Liquefied natural gas (LNG) has recently received much attention worldwide because of environmental concerns. In general, users and fabricators use high-cost welding materials such as Ni-based weld metals. For highly efficient welding and lower cost welding materials, our research group are developing 12%Ni steel weld metals for electroslag welding (ESW). However, it has reported that the Charpy i......
The effect of thermomechanical welding on the microstructure and mechanical properties of S700MC steel welds
Welding in the World - - Trang 1-17 - 2024
Grain refinement by plastic deformation during conventional TIG welding can help to compensate for the loss of mechanical properties of welded joints. The thermomechanical welding (TMW) tests were performed on S700MC steel with different combinations of TIG arc energy and high frequency hammering over three target cooling times (t8/5 = 5s, 15s, and 25s). Additionally, the effect of initial microst......
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