JOM

, Volume 67, Issue 10, pp 2271–2277 | Cite as

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

  • H. M. Daoud
  • A. M. Manzoni
  • N. Wanderka
  • U. Glatzel
Article

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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Copyright information

© The Minerals, Metals & Materials Society 2015

Authors and Affiliations

  • H. M. Daoud
    • 1
  • A. M. Manzoni
    • 2
  • N. Wanderka
    • 2
  • U. Glatzel
    • 1
  1. 1.Metals and AlloysBayreuth UniversityBayreuthGermany
  2. 2.Helmholtz-Zentrum Berlin für Materialien und Energie GmbHBerlinGermany

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