Measurement of residual stress in a welded branch connection and effects on fracture behaviour
No Thumbnail Available
Date
2010-12-16
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Insitute of Physics
Abstract
The branch analysed in this paper was not post weld heat treated, resulting in significant residual stresses. Assessment codes assume these to be at, or close to, yield. An integrity assessment of a welded branch connection was carried out using these high assumed residual stresses. The weld then had residual stresses determined by neutron diffraction, performed using ANSTO's residual stress diffractometer, Kowari. The maximum measured residual stress (290 MPa or 60% of yield) was much lower than the yield value assumed by assessment codes. Reanalysing with the actual residual stresses almost doubled the critical crack size, increasing the safety of the connection. © 2010, Insitute of Physics.
Description
Keywords
Residual stresses, Welded joints, Fracture properties, Neutron diffraction, Heat treatments, Cracks
Citation
Law, M., Luzin, V., Kirstein, O. (2010). Measurement of residual stress in a welded branch connection and effects on fracture behaviour. Paper presented to the International Conference on Neutron Scattering 2009, 3th–7th May 2009. Knoxville, Tennessee, USA. In Journal of Physics: Conference Series, 251(1), 012045.