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An investigation of strain hardening and creep in an AI-6061/AI2O3 metal matrix composite

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Abstract

Experiments were conducted to compare the influence of temperature on the flow and strain-hardening characteristics of an Al-6061 metal matrix composite, reinforced with ∼20 vol pct of Al2O3-based microspheres, with the unreinforced monolithic alloy. At room temperature, the yield stresses and the strain-hardening rates are higher in the composite material in the asquenched condition and after aging at 448 K for periods of time up to 300 hours. The 0.2 pct proof stress and the strain-hardening rate decrease with increasing temperature in both materials, but the rate of decrease is faster in the composite so that the unreinforced monolithic alloy exhibits higher yield stresses and strain-hardening rates at temperatures in the vicinity of 600 K. Under conditions of constant stress at high temperatures, the composite exhibits both a higher creep strength than the monolithic alloy and higher values for the stress exponents for creep.

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Authors and Affiliations

  1. Department of Technology, Fukuoka University of Education, Munakata, 811-41, Fukuoka, Japan

    Minoru Furukawa (Associate Professor) & Terence G. Langdon (Professor)

  2. Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University, 812, Fukuoka, Japan

    Jingtao Wang

  3. Departments of Materials Science and Mechanical Engineering, University of Southern California, 90089-1453, Los Angeles, CA

    Zenji Horita (Associate Professor), Minoru Nemoto (Professor) & Yan Ma (Research Assistant Professor)

Authors
  1. Minoru Furukawa
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  2. Jingtao Wang
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  3. Zenji Horita
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  4. Minoru Nemoto
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  5. Yan Ma
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  6. Terence G. Langdon
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Additional information

Formerly Visiting Scholar, Kyushu University, is Associate Professor, Department of Metallurgy, Xian Institute of Metallurgy and Construction Engineering, Xian 710055, People’s Republic of China.

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Furukawa, M., Wang, J., Horita, Z. et al. An investigation of strain hardening and creep in an AI-6061/AI2O3 metal matrix composite. Metall Mater Trans A 26, 633–639 (1995). https://doi.org/10.1007/BF02663912

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  • DOI: https://doi.org/10.1007/BF02663912

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