Investigation of strain-free reference for residual strain measurements in a weldments by neutron and synchrotron diffraction
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Date
2005-11-27
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B. V.
Abstract
The measurement of residual strain using diffraction techniques relies on the determination of a change in lattice parameter relative to reference or 'strain free' lattice parameter. Elucidating a relevant reference lattice parameter is the most important part of any diffraction-based, residual strain experiment. In this research, neutron and synchrotron diffraction techniques have been used to investigate the strain distribution in strain reference samples used to establish the residual stresses due to welding. It is shown that there is a variation in measured diffraction angles along the length of the weld, in particular for a parent metal, heat-affected zone (HAZ) and weld metal. The stress-free samples, cuboid and a comb sample, were produced A study of the issues in using the cubes and comb sample, were produced using electro-discharge maching (EDM) to obtain a macro-strain relieved condition and reveal information about microstructural and intergranular strain variations, residual stress in welding is presented. A study is presented of the application of a strain-free cuboid and a comb sample in the flux-cored arc welding (FCAW) process
Description
Physical copy held by ANSTO Library at DDC 539.7213/3
Keywords
Comparative evaluations, Design, Distribution, Neutron diffraction, Residual stresses, Resolution, Structural chemical analysis, Welding, Synchrotrons
Citation
Paradowska, A., Finlayson, T. R., Price, J. W. H., Ibrahim, R., Steuwer, A., & Ripley, M. (2006). Investigation of strain-free reference for residual strain measurements in a weldments by neutron and synchrotron diffraction. Paper presented at the Eighth International Conference on Neutron Scattering ICNS 2005: "Neutrons for structure and dynamics - a new era", Sydney Convention & Exhibition Centre, Sydney, Australia, 27 November-2 December 2005. In Final Programme and Abstract Book. (pp. 261).