Phase Change and Mechanical Behaviors of TixCoCrFeNiCu1−yAly High Entropy Alloys

    Volume 7, Issue 5 (May 2010)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 28 May 2010

    Page Count: 8


    Zhang, Y.
    Univ. of Science and Technology Beijing, Beijing,

    Chen, G. L.
    Univ. of Science and Technology Beijing, Beijing,

    Gan, C. L.
    Nanyang Technological Univ., Singapore,

    (Received 19 May 2009; accepted 20 April 2010)

    Abstract

    The alloying effects of the Al, Ti, Cu, and Co in a typical TixCoCrFeNiCu1−yAly high entropy alloy (HEA) were systematically studied. The phase change of the HEAs is closely related to the atomic packing efficiency of the phases. The high entropy of the alloy will largely lower the Gibbs free energy when the enthalpy of the alloys are not changed too much, and the high entropy phase can be an equilibrium stable one. The HEAs can have ultrahigh fracture strength at room temperature and high temperature, e.g., yield strength of 1400 MPa at 500°C.


    Paper ID: JAI102527

    DOI: 10.1520/JAI102527

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    Title Phase Change and Mechanical Behaviors of TixCoCrFeNiCu1−yAly High Entropy Alloys
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