Microstructures and Crackling Noise of AlxNbTiMoV High Entropy Alloys

oleh: Shu Ying Chen, Xiao Yang, Karin A. Dahmen, Peter K. Liaw, Yong Zhang

Format: Article
Diterbitkan: MDPI AG 2014-02-01

Deskripsi

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.