Journal
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
Volume 86, Issue 1, Pages 13-19Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijpvp.2008.11.010
Keywords
Residual stress; Neutron diffraction; Welding; Stress measurement; Stainless steel
Funding
- UK Science and Technology Facilities Council
- British Energy Generation Limited
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The distribution of residual stress in three orthogonal directions has been measured within a Type 316L austenitic stainless steel bead-on-plate weld specimen. Neutron diffraction was employed using the ENGIN-X instrument, located at the ISIS spallation facility of the Rutherford Appleton Laboratory. UK. A stress-free lattice parameter reference value was determined from a small cube, extracted from a far corner of the plate. A high magnitude of tensile residual stress was found along the weld bead in the longitudinal and transverse directions. The distributions of stress along through-thickness lines at the weld bead nominal start and stop locations and at the mid-length position showed an almost identical stress variation. However, a map of measured residual strain in the transverse direction beneath the weld bead revealed a concentration of strain located several millimetres before the nominal weld stop position where through-wall stress profiles were measured. (C) 2008 Elsevier Ltd. All rights reserved.
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