Residual stress distributions in laser and gas metal-arc welded high-strength steel plates

Research output: Contribution to journalArticle

  • External authors:
  • Wei Guo
  • Dave Crowther
  • Alan Thompson

Abstract

S700 is a high-strength steel recently developed by Tata Steel. This paper describes the residual stress distributions in a multi-pass gas-metal-arc weld (GMAW), a single pass autogenous laser weld (ALW) and a multi-pass ultra-narrow gap laser weld (NGLW) in 13 mm thick high-strength (S700) steel plates, as measured by X-ray diffraction and the contour method. The relationships between microstructural variation and residual stress distributions were investigated. It was found that solid-sate phase transformations from austenite to ferrite, bainite and martensite changed both the magnitude and distribution of residual stresses in the three different welded specimens. The width of the regions sustaining tensile stress in each specimen decreased in the following order: GMAW > ALW > ultra-NGLW.

Bibliographical metadata

Original languageEnglish
Pages (from-to)1449-1461
Number of pages13
JournalMaterials Science and Technology
Volume32
Issue number14
DOIs
Publication statusPublished - 27 Jun 2016