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