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Arc welding

About: Arc welding is a research topic. Over the lifetime, 25393 publications have been published within this topic receiving 168182 citations.


Papers
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Book ChapterDOI
01 Jan 2011
TL;DR: In this paper, the design of the parts taking the complex process behaviour of the arc welding process into account is discussed, and the FEM is used to predict temperature and stress distributions to minimize part distortions.
Abstract: Additive Layer Manufacture (ALM) is a technique whereby freeform structures are produced by building up material in layers. RUAM (Ready-to-Use Additive Layer Manufacturing) is an innovative concept for building large scale metal ready-to-use parts. The design for RUAM has several process steps: the geometric design of the parts taking the complex process behaviour of the arc welding process into account; FEM to predict temperature and stress distributions to minimise part distortions; and efficient robot tool path design. This paper covers these essential design steps from a technical as well as practical point of view.

42 citations

Journal Article
TL;DR: In this paper, a new Ferrite Number prediction model, called ORFN (Oak Ridge Ferrite number), was developed, which quantitatively takes account of cooling rate effects on the ferrite number for the first time.
Abstract: A new Ferrite Number prediction model, ORFN (Oak Ridge Ferrite Number), was developed in Part 1 of this study (Welding Journal, January 2003) and, in this contribution, the model predictions are evaluated and compared with predictions of other models. The ORFN quantitatively takes account of cooling rate effects on the Ferrite Number for the first time. It is shown the new ORFN model presents very good agreement with experimental data and is significantly more accurate than existing constitution diagrams or recently developed composition-only neural network models. The model is equally valid for austenitic stainless steels and duplex stainless steels. Furthermore, the model is applicable to both conventional arc welding conditions as well as high cooling rate conditions prevalent during high energy beam welding, such as laser beam welding, and high-speed arc welding.

42 citations

Journal ArticleDOI
TL;DR: In this paper, a new technique is presented for the analysis of welding process emission spectra to accurately estimate in real-time the plasma electronic temperature, through the emission lines from multiple atomic species, may be used to monitor possible perturbations during the welding process.
Abstract: A new technique is presented in this paper for the analysis of welding process emission spectra to accurately estimate in real-time the plasma electronic temperature. The estimation of the electronic temperature of the plasma, through the analysis of the emission lines from multiple atomic species, may be used to monitor possible perturbations during the welding process. Unlike traditional techniques, which usually involve peak fitting to Voigt functions using the Levenberg-Marquardt recursive method, sub-pixel algorithms are used to more accurately estimate the central wavelength of the peaks. Three different sub-pixel algorithms will be analysed and compared, and it will be shown that the LPO (linear phase operator) sub-pixel algorithm is a better solution within the proposed system. Experimental tests during TIG-welding using a fibre optic to capture the arc light, together with a low cost CCD-based spectrometer, show that some typical defects associated with perturbations in the electron temperature can be easily detected and identified with this technique. A typical processing time for multiple peak analysis is less than 20 ms running on a conventional PC.

42 citations

Journal ArticleDOI
TL;DR: In this article, the laser power utilized in the welding process was estimated using the experimental results and the dimensionless parameter model for laser welding; and also the energy balance equation model was studied.
Abstract: Laser welding of thin sheets of AISI 304 stainless steel was carried out with high power CW CO2 laser. The laser power utilized in the welding process was estimated using the experimental results and the dimensionless parameter model for laser welding; and also the energy balance equation model. Variation of laser welding efficiency with welding speed and mode of welding was studied. Welding efficiency was high for high-speed conduction welding of thin sheets and also in keyhole welding process at high laser powers. Effect of pre-oxidization of the surface and powder as filler material on laser power coupling is also reported. The paper also discusses effect of microstructure on the cracking susceptibility of laser welds.

42 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202396
2022186
2021303
2020685
2019807
2018922