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A Correlation Between Failure Angle and Constituent for Al-AlN Composites Under Uniaxial Tensile Conditions

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Abstract

Al-AlN composites with different AlN reinforcement fractions and porosity were fabricated through nitridation of laser-sintered AA 6061 powder followed by infiltration with AA 6061. Their failure behaviors were investigated under uniaxial tensile loading conditions. Tensile testing and fractography indicate that the fracture mode changes gradually from ductile to brittle fracture with increasing AlN reinforcement or porosity. An analysis of the fractured Al-AlN tensile samples reveals that the failure surface angle, θ, is dictated by the volume fraction of the matrix, f m , in a form of tan θ = f 5.5 m .

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Acknowledgments

The authors thank 3D Systems, Inc. and the Australian Research Council (ARC) for financial support. Constructive comments and useful suggestions from the reviewers are acknowledged.

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Authors and Affiliations

  1. The University of Queensland, School of Mechanical and Mining Engineering, ARC Centre of Excellence for Design in Light Metals, Brisbane, QLD, 4072, Australia

    Peng Yu (Research Fellow) & Ma Qian (Associate Professor)

  2. The University of Queensland, Faculty of Engineering, Architecture and Information Technology, ARC Centre of Excellence for Design in Light Metals, Brisbane, QLD, 4072, Australia

    G. B. Schaffer (Professor and Faculty Dean, Faculty of Engineering, Architecture and Information Technology)

Authors
  1. Peng Yu
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  2. G. B. Schaffer
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  3. Ma Qian
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Correspondence to Peng Yu.

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Manuscript submitted June 1, 2011.

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Yu, P., Schaffer, G.B. & Qian, M. A Correlation Between Failure Angle and Constituent for Al-AlN Composites Under Uniaxial Tensile Conditions. Metall Mater Trans A 43, 3293–3299 (2012). https://doi.org/10.1007/s11661-012-1125-5

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