Improvement of Fatigue Properties of Cast Aluminum Alloy A356 by Warm Deformation

Roy, M. J.; Maijer, D. M.; Nadot, Y.

doi:10.1007/978-3-319-48240-8_1

M. J. Roy⁴,
D. M. Maijer⁵ &
Y. Nadot⁶

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Abstract

Aluminum foundry alloys such as A356 are used extensively in applications where high cycle fatigue (HCF) resilience is a key design consideration. Fully reversed, multiaxial HCF studies on this alloy in the T6 condition have shown that endurance limits are governed by maximum principal stress and driven by crack propagation as opposed to initiation. In light of these fatigue characteristics, it has been found that warm deformation imparted via flow forming prior to heat treatment improves the fatigue resilience by upwards of 30% depending on the degree of deformation. The fatigue performance improvement has been attributed to eutectic particle size and morphology changes and potential recrystallisation of the primary phases. This hypothesis is supported by extensive particle characterisation and preliminary EBSD results.

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Authors and Affiliations

School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Sackville Street Building, Manchester, UK, M13 9PL
M. J. Roy
Department of Materials Engineering, The University of British Columbia, 309-6350 Stores Road, Vancouver, BC, Canada, V6T 1Z4
D. M. Maijer
Institut PPRIME - CNRS, ENSMA - UPR 3346 - Départment Mécanique des Matériaux, Université de Poitiers, Téléport 2 - 1 Avenue Clément Ader - BP, 4019 - 86961, Futuroscope Chasseneuil Cedex, France
Y. Nadot

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M. J. Roy
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D. M. Maijer
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Y. Nadot
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Editors and Affiliations

Department of Mechanical Engineering, The University of Akron, USA
T. S. Srivatsan (Professor of Materials Science and Engineering) (Professor of Materials Science and Engineering)
George Washington University, Washington, DC, USA
M. Ashraf Imam (Professor of Materials Science) (Professor of Materials Science)
Mechanical and Materials Engineering Department, Materials Science and Engineering Program, Wright State University, Dayton, Ohio, USA
R. Srinivasan (Professor, Director) (Professor, Director)

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Roy, M.J., Maijer, D.M., Nadot, Y. (2014). Improvement of Fatigue Properties of Cast Aluminum Alloy A356 by Warm Deformation. In: Srivatsan, T.S., Imam, M.A., Srinivasan, R. (eds) Fatigue of Materials III. Springer, Cham. https://doi.org/10.1007/978-3-319-48240-8_1

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DOI: https://doi.org/10.1007/978-3-319-48240-8_1
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48597-3
Online ISBN: 978-3-319-48240-8
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