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A model based investigation into the promise of using pulsed GRAW for weld repairs
Luleå tekniska universitet.
School of Engineering, University of Exeter.
1993 (English)In: International trends in welding science and technology: proceedings of the 3rd International Conference on Trends in Welding Research, Gatlinburg, Tennessee, USA, June 1-5, 1992 / [ed] S.A. David; J.M. Vitek, Materials Park, Ohio: ASM International, 1993, p. 399-404Conference paper, Published paper (Refereed)
Abstract [en]

Pulsed GTAW is shown to have certain advantages which can make it competitive to other "temper-bead" procedures developed in the past for in situ weld repairs. Low pulse frequencies and low welding speeds are shown to be required for obtaining the necessary degree of microstructural refinement for such applications. This conclusion is drawn from a model based analysis experimental data from pulsed GTRAW weldments on a AT steel. Relating the model to the experimental results was possible only after the heat flow model was calibrated with the experimental data obtained from a metallograhic characterisation of the pulsed welds and partially from dilatometric measurements during thermal cycle simulation. This phenomenological or "inverse modelling" procedure of estimating the physical constants in the heat flow model was made easier and more "well-conditioned" because transient information about the thermal cycles and phase transformations could be inferred from the pulsed weldments and the weld simulation trials.

Place, publisher, year, edition, pages
Materials Park, Ohio: ASM International, 1993. p. 399-404
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-35313Local ID: 9ccc5970-0899-11de-9f31-000ea68e967bISBN: 0-87170-476-5 (print)OAI: oai:DiVA.org:ltu-35313DiVA, id: diva2:1008566
Conference
International Conference on Trends in Welding Research : 01/06/1992 - 05/06/1992
Note

Godkänd; 1993; 20090304 (andbra)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-02-06Bibliographically approved

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CiteExportLink to record
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  • apa
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