Acceptability of Residual Stresses Measurement Methods of Butt Weldments and Repairs

Abstract

The joints made by fusion of materials are exposed to the influence of residual stresses induced by welding thermal cycles. Residual stresses were measured on butt welded plates made of NIOMOL 490K, before and after reparation. The objective of this paper is to compare three methods of residual stress measurement (hole-drilling method, x-ray diffraction and directional effective permeability) induced by two welding processes (Submerge Arc Welding and Transferred Ionized Molten Energy) of V-butt welded plates. The residual stresses values are higher after reparation than before reparation of welded joints