Residual Stress in Metal-Matrix Composite Cylinder Measured by Neutron Diffraction and Contour Method

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Residual Stress in Metal-Matrix Composite Cylinder Measured by Neutron Diffraction and Contour Method

V. Luzin, K. Thorogood, J.R. Griffiths, C.J. Davidson, T.R. Finlayson

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Abstract. A cylindrical sample, 14.8 mm in diameter, was machined from an Al-Mg-Si casting and then heat-treated. For the purposes of this research, the casting can be regarded as a two-phase composite of aluminium and 6 vol.% of near-spherical Si particles ~3 µm in diameter. Residual stresses in the cylinder are (i) long-range macrostresses resulting from the transient temperature gradients formed during heat-treatment, and (ii) short-range microstresses resulting from differences in the coefficients of thermal expansion between Al and Si. Neutron diffraction has been used to measure the stress tensors in each phase of the composite as a function of radial position with 2 mm spatial resolution and the microstress and macrostress components have been successfully separated. The contour method was applied to measure the axial component of the macrostress and the results are in good agreement with the neutron diffraction data.

Keywords
Residual Stress, Neutron Diffraction, Contour Method, Composite

Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: V. Luzin, K. Thorogood, J.R. Griffiths, C.J. Davidson, T.R. Finlayson, ‘Residual Stress in Metal-Matrix Composite Cylinder Measured by Neutron Diffraction and Contour Method’, Materials Research Proceedings, Vol. 2, pp 401-406, 2017

DOI: http://dx.doi.org/10.21741/9781945291173-68

The article was published as article 68 of the book Residual Stresses 2016

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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