Evaluation of through-thickness residual stresses in conventional and narrow grooved stainless steel welds

Author:

Taraphdar PK1ORCID,Mahapatra MM1,Pradhan AK1,Singh PK2,Sharma Kamal2,Kumar Suranjit2

Affiliation:

1. School of Mechanical Sciences, Indian Institute of Technology, Bhubaneswar, Odisha, India

2. Bhabha Atomic Research Centre, Mumbai, Maharashtra, India

Abstract

Thick AISI 304L stainless steel plates were welded using the gas metal arc welding process, and through-thickness residual stresses were evaluated by finite element simulation and the deep hole drilling technique. 3D moving heat source-based thermo-mechanical models were implemented to evaluate through-thickness residual stresses. The effects of the weld groove geometries and external restraints on the pattern of through-thickness residual stresses were studied. The maximum magnitude of locked-in residual stresses was recorded beneath the top surface, at a depth of around 6 mm. In comparison to conventional weld groove, the narrow weld groove configuration exhibited a 20–40% reduction in peak residual stresses. A significant rise in residual stresses was observed in constrained welds. The effect of the yield strength of the filler material on the evaluation of the through-thickness residual stress distribution in the course of finite element modeling was illustrated. The evolution of through-thickness residual stresses was also assessed concerning each weld pass.

Funder

Board of Research in Nuclear Sciences

Publisher

SAGE Publications

Subject

Mechanical Engineering,General Materials Science

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