Residual stress determination in an overlay dissimilar welded pipe by neutron diffraction
- ORNL
- Korea Atomic Energy Research Institute
- Doosan Heavy Industries & Construction
Residual stresses were determined through the thickness of a dissimilar weld overlay pipe using neutron diffraction. The specimen has a complex joining structure consisting of a ferritic steel (SA508), austenitic steel (F316L), Ni-based consumable (Alloy 182), and overlay of Ni-base superalloy (Alloy 52M). It simulates pressurized nozzle components, which have been a critical issue under the severe crack condition of nuclear power reactors. Two neutron diffractometers with different spatial resolutions have been utilized on the identical specimen for comparison. The macroscopic 'stress-free' lattice spacing (d{sub o}) was also obtained from both using a 2-mm width comb-like coupon. The results show significant changes in residual stresses from tension (300-400 MPa) to compression (-600 MPa) through the thickness of the dissimilar weld overlay pipe specimen.
- Research Organization:
- Oak Ridge National Laboratory (ORNL); High Flux Isotope Reactor
- Sponsoring Organization:
- ORNL work for others
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1024267
- Journal Information:
- Materials Science and Engineering A, Journal Name: Materials Science and Engineering A Journal Issue: 27 Vol. 528; ISSN 0921-5093
- Country of Publication:
- United States
- Language:
- English
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