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Entropy 2014, 16(2), 870-884; doi:10.3390/e16020870
Article

Microstructures and Crackling Noise of AlxNbTiMoV High Entropy Alloys

1
, 1
, 2
, 3
 and 1,*
1 State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China 2 Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801, USA 3 Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996, USA
* Author to whom correspondence should be addressed.
Received: 28 October 2013 / Revised: 5 February 2014 / Accepted: 6 February 2014 / Published: 13 February 2014
(This article belongs to the Special Issue High Entropy Alloys)
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Abstract

A series of high entropy alloys (HEAs), AlxNbTiMoV, was produced by a vacuum arc-melting method. Their microstructures and compressive mechanical behavior at room temperature were investigated. It has been found that a single solid-solution phase with a body-centered cubic (BCC) crystal structure forms in these alloys. Among these alloys, Al0.5NbTiMoV reaches the highest yield strength (1,625 MPa), which should be attributed to the considerable solid-solution strengthening behavior. Furthermore, serration and crackling noises near the yielding point was observed in the NbTiMoV alloy, which represents the first such reported phenomenon at room temperature in HEAs.
Keywords: high entropy alloy; disordered solid solution; jerky flow; serration phenomena; crackling noise high entropy alloy; disordered solid solution; jerky flow; serration phenomena; crackling noise
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Chen, S.Y.; Yang, X.; Dahmen, K.A.; Liaw, P.K.; Zhang, Y. Microstructures and Crackling Noise of AlxNbTiMoV High Entropy Alloys. Entropy 2014, 16, 870-884.

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