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An investigation into the effect of weld technique on the residual stress distribution of 3CR12 (DIN 1.4003) built-up structural sections

Författare

  • J. J. Klopper
  • R. F. Laubscher
  • Axel Steuwer
  • M. N. James

Summary, in English

This article presents an experimental investigation of thermally induced residual stresses in fabricated 3CR12 (DIN 1.4003) T-sections. 3CR12 is a weldable utility stainless steel developed to provide a superior alternative to coated carbon steels and other alloys which have a poor corrosion/abrasion resistance. Because of the difficulty and costs involved in hot-rolling stainless steel structural sections, they are usually fabricated by welding. In this investigation, full-penetration laser- and manual metal arc (MMA) joints were considered along with partial-penetrated MMA- and metal inert gas (MIG) welded joints. The residual stresses induced during welding were measured by neutron diffraction. All the sections displayed a largely tensile residual stress field around the weld that subsequently implied a compressive residual stress field in the flange regions. This was most pronounced for the MMA and MIG welds. The laser- welded sections displayed a more localized tensile residual stress field in the heat-affected zone that translated to lower average stresses in the flanges. In the latter part of this article, the effect of the weld-induced residual stress fields on the structural performance of appropriate T-section-based columns are assessed and compared. A significant difference in structural performance between the different weld techniques is predicted with the laser- welded sections displaying the highest predicted strength.

Publiceringsår

2011

Språk

Engelska

Sidor

123-132

Publikation/Tidskrift/Serie

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications

Volym

225

Issue

L3

Dokumenttyp

Artikel i tidskrift

Förlag

SAGE Publications

Ämne

  • Natural Sciences
  • Physical Sciences

Nyckelord

  • 3CR12
  • DIN 1.4003
  • welding
  • residual stress/strain
  • neutron
  • diffraction
  • stainless steel
  • T-section
  • professional ratio (factor)

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1464-4207