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https://hdl.handle.net/2440/113892
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Type: | Journal article |
Title: | Microstructure and properties of novel CoCrFeNiTaₓ eutectic high-entropy alloys |
Other Titles: | Microstructure and properties of novel CoCrFeNiTa(x) eutectic high-entropy alloys |
Author: | Huo, W. Zhou, H. Fang, F. Zhou, X. Xie, Z. Jiang, J. |
Citation: | Journal of Alloys and Compounds, 2018; 735:897-904 |
Publisher: | Elsevier BV |
Issue Date: | 2018 |
ISSN: | 0925-8388 1873-4669 |
Statement of Responsibility: | Wenyi Huo, Hui Zhou, Feng Fang, Xuefeng Zhou, Zonghan Xie, Jianqing Jiang |
Abstract: | Eutectic high-entropy alloys are potential replacements of structural alloys, due to their microstructure and properties. In this work, CoCrFeNiTax (x = 0.1, 0.2, 0.3, 0.395, 0.4 and 0.5, x value in molar ratio) eutectic high-entropy alloys were produced by arc melting technique. Two phases, FCC solid solution and Laves phase, are identified in the alloys. The alloys are transformed from hypoeutectic to hypereutectic solidification by increasing Ta content. CoCrFeNiTa0.395 eutectic high-entropy alloy exhibits an ultrahigh yield strength of 1.4 GPa, while CoCrFeNiTa0.3 hypoeutectic high-entropy alloy shows a compressive strength of 2.5 GPa and a considerable fracture strain of 44%. Such remarkable strengthening effects are shown to result from the ideal combination among the second-phase, solid solution, and boundary strengthening. |
Keywords: | High-entropy alloy; Laves phase; eutectic; tantalum |
Description: | Available online 8 November 2017 |
Rights: | © 2017 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.jallcom.2017.11.075 |
Grant ID: | http://purl.org/au-research/grants/arc/DP160104632 |
Published version: | http://dx.doi.org/10.1016/j.jallcom.2017.11.075 |
Appears in Collections: | Aurora harvest 8 Mechanical Engineering publications |
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