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Open AccessArticle

A Criterion for Topological Close-Packed Phase Formation in High Entropy Alloys

by Yiping Lu 1,2,†, Yong Dong 1,†, Li Jiang 1, Tongmin Wang 1,*, Tingju Li 1,3 and Yong Zhang 4,*
1
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
2
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
3
Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
4
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Kevin H. Knuth
Entropy 2015, 17(4), 2355-2366; https://doi.org/10.3390/e17042355
Received: 19 January 2015 / Revised: 10 April 2015 / Accepted: 15 April 2015 / Published: 20 April 2015
The stability of topological close-packed (TCP) phases were found to be well related to the average value of the d-orbital energy level \( \overline{Md} \) for most reported high entropy alloys (HEAs). Excluding some HEAs that contain high levels of the elements aluminum and vanadium, the results of this study indicated that the TCP phases form at \( \overline{Md} \) > 1.09. This criterion, as a semi-empirical method, can play a key role in designing and preparing HEAs with high amounts of transitional elements. View Full-Text
Keywords: high entropy alloys; TCP phases; d-orbital energy level; alloy design high entropy alloys; TCP phases; d-orbital energy level; alloy design
MDPI and ACS Style

Lu, Y.; Dong, Y.; Jiang, L.; Wang, T.; Li, T.; Zhang, Y. A Criterion for Topological Close-Packed Phase Formation in High Entropy Alloys. Entropy 2015, 17, 2355-2366.

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