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High-Temperature Tensile Strength of Al10Co25Cr8Fe15Ni36Ti6 Compositionally Complex Alloy (High-Entropy Alloy)

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Abstract

Homogenizing at 1220°C for 20 h and subsequent aging at 900°C for 5 h and 50 h of a novel Al10Co25Cr8Fe15Ni36Ti6 compositionally complex alloy (high-entropy alloy) produces a microstructure consisting of an L12 ordered γ′ phase embedded in a face-centered cubic solid-solution γ matrix together with needle-like B2 precipitates (NiAl). The volume fraction of γ′ phase is ~46% and of needle-like B2 precipitates <5%, which is in accordance with the prediction of calculation of phase diagram method (CALPHAD using Thermo-Calc software with TTNi7 database; Thermo-Calc Software, Stockholm, Sweden). The high-temperature tensile tests were carried out at room temperature, 600°C, 700°C, 800°C, and 1000°C. The tensile strength as well as the elongation to failure of both heat-treated specimens is very high at all tested temperatures. The values of tensile strength has been compared with literature data of well-known Alloy 800H and Inconel 617, and is discussed in terms of the observed microstructure.

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Authors and Affiliations

  1. Metals and Alloys, Bayreuth University, 95447, Bayreuth, Germany

    H. M. Daoud & U. Glatzel

  2. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109, Berlin, Germany

    A. M. Manzoni & N. Wanderka

Authors
  1. H. M. Daoud
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  2. A. M. Manzoni
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  3. N. Wanderka
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  4. U. Glatzel
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Correspondence to U. Glatzel.

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Daoud, H.M., Manzoni, A.M., Wanderka, N. et al. High-Temperature Tensile Strength of Al10Co25Cr8Fe15Ni36Ti6 Compositionally Complex Alloy (High-Entropy Alloy). JOM 67, 2271–2277 (2015). https://doi.org/10.1007/s11837-015-1484-7

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  • DOI: https://doi.org/10.1007/s11837-015-1484-7

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