Observations of the stress developed in Si inclusions following plastic flow in the matrix of an Al–Si–Mg alloy

Cameron J. Davidson, Trevor R. Finlayson, Michael E. Fitzpatrick, John R. Griffiths, Edward C. Oliver, Qigui Wang

Research output: Contribution to journalArticle

4 Citations (Scopus)
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Abstract

Measurements are made of the stress developed in near-spherical elastic inclusions in an elastic plastic matrix under both tension and compression loading. Two experimental conditions are reported. The first case is where no thermal mismatch exists between the inclusions and the matrix, so that the stress in the inclusion is purely a result of the misfit in the elastic moduli and of the distortion of the plastic slip-line field around the inclusion. The observations are believed to be the first such and are in qualitative agreement with finite-element modelling for idealised inclusion distributions. The second case is the more usual one where a thermal misfit stress exists and observations are reported of the stress relief effects caused by the interaction of the plasticity-induced stress with the thermal and elastic misfit stresses.

Original languageEnglish
Pages (from-to)1398-1417
Number of pages20
JournalPhilosophical Magazine
Volume97
Issue number17
DOIs
Publication statusPublished - 11 Apr 2017

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plastic flow
inclusions
matrices
plastics
thermal stresses
plastic properties
modulus of elasticity
slip
interactions

Keywords

  • aluminium alloys
  • composite materials
  • neutron diffraction
  • plastic misfit stress
  • plasticity of metals
  • residual stress
  • Residual stress relaxation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Observations of the stress developed in Si inclusions following plastic flow in the matrix of an Al–Si–Mg alloy. / Davidson, Cameron J.; Finlayson, Trevor R.; Fitzpatrick, Michael E.; Griffiths, John R.; Oliver, Edward C.; Wang, Qigui.

In: Philosophical Magazine, Vol. 97, No. 17, 11.04.2017, p. 1398-1417.

Research output: Contribution to journalArticle

Davidson, Cameron J. ; Finlayson, Trevor R. ; Fitzpatrick, Michael E. ; Griffiths, John R. ; Oliver, Edward C. ; Wang, Qigui. / Observations of the stress developed in Si inclusions following plastic flow in the matrix of an Al–Si–Mg alloy. In: Philosophical Magazine. 2017 ; Vol. 97, No. 17. pp. 1398-1417.
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AU - Wang, Qigui

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AB - Measurements are made of the stress developed in near-spherical elastic inclusions in an elastic plastic matrix under both tension and compression loading. Two experimental conditions are reported. The first case is where no thermal mismatch exists between the inclusions and the matrix, so that the stress in the inclusion is purely a result of the misfit in the elastic moduli and of the distortion of the plastic slip-line field around the inclusion. The observations are believed to be the first such and are in qualitative agreement with finite-element modelling for idealised inclusion distributions. The second case is the more usual one where a thermal misfit stress exists and observations are reported of the stress relief effects caused by the interaction of the plasticity-induced stress with the thermal and elastic misfit stresses.

KW - aluminium alloys

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