Multi-axial Analyses of Welding Stresses in High-Strength Steel Welds

Multi-axial Analyses of Welding Stresses in High-Strength Steel Welds

D. Schroepfer, K. Flohr, A. Kromm, T. Kannengiesser

Abstract. Today’s efforts for lightweight design result in a growing application of high-strength structural steels from 960 MPa. In welded structures of these steels increased demands regarding component safety and a high elastic ratio should be considered. Hence, the prevention of an evolution of high weld-induced tensile residual stresses is required. Recent studies showed that component related restraint conditions of welds are able to elevate welding induced stresses to critical values, depending on material characteristics, the welding process and parameters. This work involves multi-axial welding loads as a consequence of the superposition of local residual stresses, global reaction stresses and moments, varying the welding parameters under different restraint conditions. The global welding loads are measured via GMA-weld tests in a special testing facility and via a DIC(Digital Image Correlation)-system in a slot weld. Local transverse residual stresses were analysed by means of X-ray diffraction. The application of a less amount of weld runs due to a modified welding parameters and welds seam configurations revealed as a beneficial approach to reduce welding loads in high-strength steels.

Keywords
High-Strength Steel, Welding, Reaction Stress, X-Ray Diffraction

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: D. Schroepfer, K. Flohr, A. Kromm, T. Kannengiesser, ‘Multi-axial Analyses of Welding Stresses in High-Strength Steel Welds’, Materials Research Proceedings, Vol. 2, pp 205-210, 2017

DOI: http://dx.doi.org/10.21741/9781945291173-35

The article was published as article 35 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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