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Effect of Microstructure on Deformation and Fracture of Thixomolded and Thermomechanically Processed AZ61

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Abstract

This paper investigates the deformation, damage accumulation and fracture behavior of fine-grained AZ61 sheet produced by combined Thixomolding and Thermomechanical (TTMP) processing. In the TTMP process, warm rolling of a fine-grained, untextured Thixomolded plate with subsequent recrystallizion produces a sheet with an α-Mg grain size of 3 to 5 μm and ß-particles with an average diameter of 0.5 μm. The fine grain size and weak texture in the sheet results in nearly isotropic mechanical properties. Damage during tensile straining occurs in the form of cracking in the ß-particles in both the as-Thixomolded plate precursor and in the recrystallized sheet. However, the material fails due to strain localization in shear bands and microvoid coalescence.

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Author information

Authors and Affiliations

  1. Materials Science and Engineering, University of Michigan, 2300 Hayward St, Ann Arbor, MI, 48109, USA

    T. D. Berman, W. Donlon & J. W. Jones

  2. nanoMAG, LLC., 13753 Otterson Court, Livonia, MI, 48150, USA

    R. Decker

  3. Materials Department, University of California, Santa Barbara, Santa Barbara, CA, 93106-5050, USA

    T. M. Pollock

Authors
  1. T. D. Berman
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  2. W. Donlon
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  3. R. Decker
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  4. T. M. Pollock
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  5. J. W. Jones
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Editor information

Editors and Affiliations

  1. Department of Materials Science and Engineering, University of Florida, USA

    Michele V. Manuel (Assistant Professor) (Assistant Professor)

  2. Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung, Geesthacht, Germany

    Norbert Hort (head of the Magnesium Processing Department at the Magnesium Innovation Centre (MagIC) (head of the Magnesium Processing Department at the Magnesium Innovation Centre (MagIC)

  3. IND LLC, Canada

    Neale R. Neelameggham (“The Guru”) (“The Guru”)

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© 2014 TMS (The Minerals, Metals & Materials Society)

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Berman, T.D., Donlon, W., Decker, R., Pollock, T.M., Jones, J.W. (2014). Effect of Microstructure on Deformation and Fracture of Thixomolded and Thermomechanically Processed AZ61. In: Alderman, M., Manuel, M.V., Hort, N., Neelameggham, N.R. (eds) Magnesium Technology 2014. Springer, Cham. https://doi.org/10.1007/978-3-319-48231-6_33

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