Residual Stress Measurements in Multi-Pass Welded High Strength Steel Using Energy Dispersive Synchrotron X-Ray Diffraction

Abstract:

Six pass welds were made on a 16 mm thick high strength quenched and tempered structural steel plate (S690QL1, Fe-0.16C-0.2Si-0.87Mn-0.33Cr-0.21Mo (wt.%)). Depth resolved measurements in two orthogonal directions were carried out using energy dispersive synchrotron X-ray diffraction at the ID15 beamline of the European Synchrotron Radiation Facility. The strains were calculated from the shift in the local d-spacing for four bcc planes ({200}, {211}, {220}, {310}). The planar stresses were calculated from the biaxial Hooke’s law, using the diffraction elastic constants of the individual planes. A two dimensional cross-sectional residual stress map with a depth resolution of 2 mm was obtained. Transverse compressive stresses were found at the weld toes and root. Transverse tensile stresses were present in the middle of the plate. Longitudinal tensile stresses concentrated along the fusion line. This work describes the procedures to obtain the depth resolved residual stress map and the generated results provide necessary information to validate thermal mechanical finite element model of multi-pass welding.

• Periodical: Advanced Materials Research (Volume 922)
• Pages: 177-182
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.922.177
• Online since: May 2014
• Authors: H. Gao*, R.M. Huizenga, R.K. Dutta, M. Amirthalingam, M.J.M. Hermans, T. Buslaps, I.M. Richardson
• Keywords: Energy Dispersive Synchrotron Diffraction, Multi-Pass Welding, Residual Stress

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