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Indentation Size Effect and Strain Rate Sensitivity of Nanocrystalline MG–AL Alloys

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Engineering Asset Management and Infrastructure Sustainability

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Abstract

Deformation behaviour of microcrystalline and nanocrystalline (nc) Mg-5%Al alloys were investigated using instrumented indentation tests. The hardness values exhibited significant indentation size effect (ISE), with nc alloys showing weaker ISE. Relative higher strain rate sensitivity and inverse Hall–Petch relationship were observed in the nc alloys. This is attributed to highly localized dislocation activities and relative smaller activation volume, as compared to their mc counterparts. It is believed there is an increasing role of grain boundaries in plastic deformation mechanisms with decreasing the grain size.

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Authors and Affiliations

  1. School of Engineering Systems, Queensland University of Technology, Brisbane, QLD, Australia

    Hui Diao, Cheng Yan & John Bell

  2. Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore

    Li Lu

  3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016, Shenyang, China

    Guangping Zhang

Authors
  1. Hui Diao
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  2. Cheng Yan
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  3. John Bell
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  4. Li Lu
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  5. Guangping Zhang
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Corresponding author

Correspondence to Cheng Yan .

Editor information

Editors and Affiliations

  1. Queensland University of Technology, Bardolph Place 10, Sunnybank Hills, 4109, Australia

    Joseph Mathew

  2. , Electrical & Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore

    Lin Ma

  3. Queensland University of Technology, Arrabri Av 192, Mt Ommaney, 4074, Australia

    Andy Tan

  4. Delft University of Technology, Gerard Brandtstraat 107, Leiden, 2332 AK, Netherlands

    Margot Weijnen

  5. University of Cincinnati, Saint Andrews Court 3939, Mason, 45040, USA

    Jay Lee

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© 2012 Springer-Verlag London Limited

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Diao, H., Yan, C., Bell, J., Lu, L., Zhang, G. (2012). Indentation Size Effect and Strain Rate Sensitivity of Nanocrystalline MG–AL Alloys. In: Mathew, J., Ma, L., Tan, A., Weijnen, M., Lee, J. (eds) Engineering Asset Management and Infrastructure Sustainability. Springer, London. https://doi.org/10.1007/978-0-85729-493-7_14

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  • DOI: https://doi.org/10.1007/978-0-85729-493-7_14

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  • Publisher Name: Springer, London

  • Print ISBN: 978-0-85729-301-5

  • Online ISBN: 978-0-85729-493-7

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