Finite Element Analysis of Welding Induced Residual Stresses for Duplex Stainless Steel Weld Joint using Contour Method

Author(s):

V. Vijayakumar , KINGS COLLEGE OF ENGINEERING; H. Agilan, KINGS COLLEGE OF ENGINEERING

Keywords:

Residual Stresses, Contour Method, Surface Fitting, Duplex stainless steel, FEM

Abstract:

In fusion welding, thermal cycle leads to undesirable metallurgical structure and causes residual stresses gets induced near the weld zone which plays an important role in determining the reliability of the weld joint. In this present work, the prediction of residual stresses in a welded joint has been done using Contour method. The measurements of the cross-sectional residual stress profile in a Duplex stainless steel 2205 welded with ER 2209 filler material are validated in the longitudinal direction. This method is simple in principle and easy in use. According to this method, the weld metal containing residual stresses is cut along the plane perpendicular to the weld line. The deformations occurring at the cut surfaces as a result of relaxation of the residual stresses are measured. The measured deformations are given as displacement boundary conditions to a finite element model to calculate the corresponding stresses normal to the cutting plane. This superposition principle assumes that the material behaves elastically during relaxation of residual stresses and that the cutting process does not introduce any new stresses to influence the measured displacements. It requires only one straight cut through a sample on the plane of interest, followed by measurement of the surface contour produced by relaxation of the internally stored stress field. This study indicates that the contour method is a powerful novel technique to obtain an accurate full three-dimensional map of residual stress field.

Other Details:

Manuscript Id	:	IJSTEV4I5041
Published in	:	Volume : 4, Issue : 5
Publication Date	:	01/12/2017
Page(s)	:	99-102

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