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Quantitative Assessment of Deformation-Induced Damage in a Semisolid Aluminum Alloy via X-ray Microtomography

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Abstract

Semisolid tensile testing combined with X-ray microtomography (XMT) was used to characterize the development of internal damage as a function of strain in an aluminum-magnesium alloy, AA5182. Novel techniques were developed to allow the quantification of both the size evolution and orientation of the damage to determine mechanisms controlling the early stage growth and localization. During the initial stages of semisolid deformation, it was observed that strain was accommodated by both the growth of as-cast porosity and the detection of new damage-based voids. As the volume fraction of damage increases, the growth of voids occurs in an orientation perpendicular to the loading direction, both through expansion within the grain boundary liquid and void coalescence. The damage then localizes, causing failure.

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Acknowledgments

The authors acknowledge NSERC, EPSRC (GR/T26344), and Alcan International for financial support. They also thank R. Hamilton and M. Kershaw for assistance with XMT, R. Atwood for assistance in developing the code to calculate each void’s eigenvectors, and C. Sinclair for assistance in interpreting the void spatial orientation results. The authors also gratefully acknowledge both Jerome Adrien (MATEIS Laboratory) and the staff members of the ID19 Beam Line ESRF for allowing the high-resolution scan to be performed on the as-cast material.

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Author notes

  1. A.B. Phillion (Doctoral Candidate, Postdoctoral Fellow)

    Present address: Computational Materials Laboratory, Institute of Materials, Ecole Polytechnique Fédérale de Lausanne, Lausanne, CH 1015, Switzerland

Authors and Affiliations

  1. Department of Materials Engineering, University of British Columbia, Vancouver, Canada, V6T 1Z4

    A.B. Phillion (Doctoral Candidate, Postdoctoral Fellow) & S.L. Cockcroft (Professor and Department Head)

  2. Department of Materials, Imperial College London, Prince Consort Road, London, SW7 2BP, United Kingdom

    P.D. Lee (Professor)

  3. Université de Lyon, INSA-Lyon, Villeurbanne, 69621, France

    E. Maire (Research Associate)

Authors
  1. A.B. Phillion
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  2. P.D. Lee
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  3. E. Maire
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  4. S.L. Cockcroft
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Corresponding author

Correspondence to A.B. Phillion.

Additional information

Manuscript submitted January 21, 2008.

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Phillion, A., Lee, P., Maire, E. et al. Quantitative Assessment of Deformation-Induced Damage in a Semisolid Aluminum Alloy via X-ray Microtomography. Metall Mater Trans A 39, 2459–2469 (2008). https://doi.org/10.1007/s11661-008-9584-4

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