A Comparison of Strain Measurements on an Inertia Friction Weld Using the ENGIN-X and SALSA Neutron Strain Mapping Instruments


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In this study we present a direct comparison between residual strain measurements carried out on the same inertia friction weld using ENGIN-X at ISIS, UK and the new strain scanner SALSA at ILL, France. ENGIN-X is a time of flight (TOF) instrument, which receives neutrons from a neutron spallation source, while the SALSA Strain-Imager, a high resolution diffractometer, is based at a research reactor source with a continuous neutron flux and is operated with a constant wavelength. The purpose of this study was to demonstrate a confidence in crosscomparing future strain measurements to be performed at ENGIN-X and SALSA. Measurements were carried out on medium size inertia friction welded nickel superalloy test-piece, which show no significant crystallographic texture across the weld line. The results demonstrate that, even though residual stresses determined on SALSA only rely on a single peak analysis (in this case the (111) reflection), the results show excellent agreement with the measurements carried out on ENGIN-X, where strain is determined from multi-peak Rietveld analysis.



Materials Science Forum (Volumes 524-525)

Edited by:

W. Reimers and S. Quander




M. Karadge et al., "A Comparison of Strain Measurements on an Inertia Friction Weld Using the ENGIN-X and SALSA Neutron Strain Mapping Instruments", Materials Science Forum, Vols. 524-525, pp. 393-398, 2006

Online since:

September 2006




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DOI: 10.1016/j.msea.2006.04.083

[10] M. Preuss and M. Daymond, to be submitted to Acta Materialia.

[11] M. Karadge, B. Grant, A. Hoerling, P J. Withers, M. Preuss and G. Baxter, to be submitted to Materials Science and Engineering A.

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