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