Abstract
A series of AlCoCrxFeNi2 (x = 1.0, 1.2, 1.4, 1.6, 1.8, 2.0, 2.2, 2.4) high entropy alloys (HEAs) were designed to investigate the structural evolution and tensile properties variation with Cr content. It was found that all the alloys were composed of face-centered cubic (FCC) phase and disordered body-centered cubic (BCC) plus ordered body-centered cubic (B2) region. However, the volume fraction of FCC phase first increased and then decreased with increasing Cr content, while the valence electron concentration (VEC) values kept decreasing, which contradicts with the universal VEC criterion. Here, the partition ratio of Cr element in FCC/(BCC + B2) region was introduced to describe the structural evolution and phase stability. Our work reveals that Cr is FCC stabilizer at low concentration, and promotes the formation of BCC phase at high concentration. Similarly, the strength and ductility exhibit a non-monotonic variation with increasing Cr content.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
