Journal Published Online: 28 May 2010
Volume 7, Issue 5

Phase Change and Mechanical Behaviors of Ti CoCrFeNiCu Al High Entropy Alloys

CODEN: JAIOAD

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.

Author Information

Zhang, Y.
Univ. of Science and Technology Beijing, Beijing, China
Chen, G.
Univ. of Science and Technology Beijing, Beijing, China
Gan, C.
Nanyang Technological Univ., Singapore, Republic of Singapore
Pages: 8
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Stock #: JAI102527
ISSN: 1546-962X
DOI: 10.1520/JAI102527