The Al Effects of Co-Free and V-Containing High-Entropy Alloys
| Autor: | Mingbiao Chen, Tengfei Yang, Songqin Xia, Yong Zhang, Xiao Yang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Diffraction
lcsh:TN1-997 Materials science Scanning electron microscope Alloy microstructure 02 engineering and technology Crystal structure engineering.material 01 natural sciences 0103 physical sciences General Materials Science compressive properties lcsh:Mining engineering. Metallurgy high-entropy alloys 010302 applied physics High entropy alloys Metallurgy Metals and Alloys Cleavage (crystal) 021001 nanoscience & nanotechnology Microstructure Crystallography Transmission electron microscopy engineering 0210 nano-technology |
| Zdroj: | Metals, Vol 7, Iss 1, p 18 (2017) Metals; Volume 7; Issue 1; Pages: 18 |
| ISSN: | 2075-4701 |
| Popis: | In this study, five-component high-entropy alloys (HEAs) AlxCrFeNiV (where x denotes the molar ratio, x = 0, 0.1, 0.3, 0.5, 0.75, 1, and 1.5) were prepared using an arc-melting furnace. The effects of the addition of the Al on the crystal structures were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Also, two non-equiatomic ratio HEAs, AlxCrFeNiV (x = 0.3, and 0.5), were systematically studied through the use of various characterization methods in the as-cast state. The Al0.3CrFeNiV alloy displayed typical duplex body-centered cubic (BCC) structures, including disordered BCC (A2), and NiAl-type ordered BCC (B2) phases. Meanwhile, in regard to the Al0.5CrFeNiV alloy, this alloy was found to contain an unknown phase which was enriched in Cr and V, as well as the coherent A2/B2 phases. Both of these alloys displayed very high yield and fracture strengths. However, their compression fracture strains were approximately 10%. Also, the fracture surfaces showed mainly cleavage fracture modes. |
| Databáze: | OpenAIRE |
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