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Effect of volume fraction of SiC p reinforcement on the processing maps for 2124 Al matrix composites

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Abstract

The hot working characteristics of 2124 Al alloy matrix composites reinforced with 0, 5, 10, 15, and 20 vol pct of SiC particulate, produced by the powder metallurgy route, were studied using processing maps. The maps based on the dynamic materials model were generated from the flow stress data obtained from hot compression tests, carried out at strain rates ranging from 0.001 to 10 s−1 and temperatures ranging from 300°C to 525°C. All the compositions studied exhibited domains of dynamic recrystallization (DRX) and superplasticity. Flow instabilities were found at higher strain rates and lower temperatures. The composite with 10 vol pct SiC showed a tendency for abnormal grain growth at lower strains, which manifested itself as a shift in the DRX domain to lower strain rates and the disappearance of the superplasticity domain.

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Author notes

  1. Y. V. R. K. Prasad (Professor, NRC Research Associate)

    Present address: the Department of Metallurgy, Indian Institute of Science, 560 012, Bangalore, India

Authors and Affiliations

  1. the Defence Metallurgical Research Laboratory, 500 058, Hyderabad, India

    B. V. Radhakrishna Bhat (Scientist “E”)

  2. ARC International, 500 058, Hyderabad, India

    Y. R. Mahajan (Joint Director)

  3. AFRL/MLMR, 45433, Wright Patterson Air Force Base, OH

    Y. V. R. K. Prasad (Professor, NRC Research Associate)

Authors
  1. B. V. Radhakrishna Bhat
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  2. Y. R. Mahajan
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  3. Y. V. R. K. Prasad
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Bhat, B.V.R., Mahajan, Y.R. & Prasad, Y.V.R.K. Effect of volume fraction of SiC p reinforcement on the processing maps for 2124 Al matrix composites. Metall Mater Trans A 31, 629–639 (2000). https://doi.org/10.1007/s11661-000-0006-5

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  • DOI: https://doi.org/10.1007/s11661-000-0006-5

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