Random and Systematic Errors in Measuring the Lattice Parameters of a Dissimilar Metal Weldment


Dissimilar metal weld (DMW) joints are widely used in nuclear power plants to connect ferritic steel components with austenitic steel piping systems. AREVA has designed a new narrow gap DMW with nickel-based corrosion resistant weld filler (Alloy 52) to reduce the risk of stress corrosion degradation. Engin-X neutron measurements of the stress-free lattice parameter in small samples removed from a DMW mock-up supplied by AREVA have exhibited wide scatter between different orientations (up to 600 micro-strains). The OU is undertaking research examining the origins of uncertainty in stress-free reference measurements in DMW materials. The purpose of the present experiment is to investigate random errors, beam divergence, spatial variability and systematic rotational effects in d-spacing measurements of stress-free reference samples extracted from the AREVA DMW mock up.

DOI https://doi.org/10.5286/ISIS.E.24088111
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24088111
Creator Dr Ania Paradowska; Professor John Bouchard; Dr Jon James; Miss Anusha Kankanala; Dr Abdul Khadar Syed; Mr Xin Lu
Publisher ISIS Neutron and Muon Source
Publication Year 2015
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2012-03-17T09:45:29Z
Temporal Coverage End 2012-05-21T08:43:41Z