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Characterization of Oxide Dispersed AlCoCrFe High Entropy Alloy Synthesized by Mechanical Alloying and Spark Plasma Sintering

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Abstract

The present study deals with phase evolution of oxide dispersed AlCoCrFe high entropy alloy during mechanical alloying and spark plasma sintering. Mechanical alloying of AlCoCrFe resulted in a single BCC phase. However, ordering of BCC phase with evolution of chromium carbide and sigma phase were observed after spark plasma sintering. High hardness of 1,050 ± 20 HV1 and 1,070 ± 20 HV1 was observed for AlCoCrFe high entropy alloy without and with oxide dispersion, respectively. Significant contribution from solid solution strengthening effect in high entropy alloys appears to have overwhelmed the effect of oxide dispersion on hardness.

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Acknowledgments

Authors would like to thank Naval Research Board (NRB), Directorate of Naval R&D, New Delhi, India for the financial support through the project # DNRD/05/4003/NRB/190.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, India

    S. Praveen, Teja Sirasani, B. S. Murty & Ravi S. Kottada

  2. Department of Metallurgical and Materials Engineering, National Institute of Technology, Jamshedpur, India

    Ameey Anupam

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  1. S. Praveen
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  2. Ameey Anupam
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Correspondence to S. Praveen.

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Praveen, S., Anupam, A., Sirasani, T. et al. Characterization of Oxide Dispersed AlCoCrFe High Entropy Alloy Synthesized by Mechanical Alloying and Spark Plasma Sintering. Trans Indian Inst Met 66, 369–373 (2013). https://doi.org/10.1007/s12666-013-0268-4

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