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Mechanical response of mesoscopic aluminum rings under uniaxial compression

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Abstract

The strength of materials exhibits size effects at sample dimensions <1 mm. In the literature, two trends are identified in the length scale spectrum: smaller is stronger at <10 μn; larger is stronger at >500 μn. The dimension at which the transition between these two trends occurs remained unclear. We study this mesoscopic scale (20–400 urn) by examining the compression response of ring and pillar-shaped Al specimens. Integrating present results with literature data, we provide Al’s compression response in a “master curve” fashion. We demonstrate the inadequacies of the classical surface layer model, and suggest directions for future studies.

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ACKNOWLEDGMENTS

The authors gratefully acknowledge partial project support from the US National Science Foundation (NSF OIA-1541079). The experimental work used facilities at the LSU shared instrumentation facility (SIF), a part of the NSF EPSCoR CIMM core user facilities (CUFs).

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Authors and Affiliations

  1. Mechanical & Industrial Engineering Department, Louisiana State University, Baton Rouge, LA, 70803, USA

    Bin Zhang, Shahrior Ahmed, Shuai Shao & W. J. Meng

Authors
  1. Bin Zhang
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  2. Shahrior Ahmed
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  3. Shuai Shao
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  4. W. J. Meng
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Correspondence to W. J. Meng.

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The supplementary material for this article can be found at https://doi.org/10.1557/mrc.2018.81

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Zhang, B., Ahmed, S., Shao, S. et al. Mechanical response of mesoscopic aluminum rings under uniaxial compression. MRS Communications 8, 1254–1260 (2018). https://doi.org/10.1557/mrc.2018.81

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