Influence of Weld Repair by Gouging on the Residual Stresses in High Strength Steels

Influence of Weld Repair by Gouging on the Residual Stresses in High Strength Steels

A. Kromm, R. Schasse, P. Xu, T. Mente, T. Kannengiesser

Abstract. Carbon arc-air gouging is a common technology when repairing defects in welded structures. Often this technique is applied in repeated cycles even on the same location of the joint. Due to the multiple heat input by gouging and subsequent re-welding, the residual stresses are strongly influenced. This can become crucial when microstructure and mechanical properties are adversely affected by multiple weld reparations. Knowledge about the relation of gouging and residual stresses is scarce but important when high strength steels, which are sensitive to residual stresses, are processed. The present study shows the effect of repair welding on a high strength steel structural element. The weld and the heat affected zone were subjected to multiple thermal cycles by gouging and subsequent repair welding. The residual stresses were determined by X-ray diffraction at different positions along the joint. The results showed that the residual stress level has increased by the repair cycles. This is most pronounced for the heat affected zone. Adapted welding procedures may prevent detrimental residual stress distributions.

Keywords
Repair Welding, Weld Residual Stress, Carbon Arc-Air Gouging

Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: A. Kromm, R. Schasse, P. Xu, T. Mente, T. Kannengiesser, ‘Influence of Weld Repair by Gouging on the Residual Stresses in High Strength Steels’, Materials Research Proceedings, Vol. 2, pp 169-174, 2017

DOI: https://dx.doi.org/10.21741/9781945291173-29

The article was published as article 29 of the book Residual Stresses 2016

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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