Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 719, Issue -, Pages 189-193Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.05.175
Keywords
High-entropy alloy; CoCrFeMnNi; Thermodynamics; Sigma phase; High-pressure torsion
Categories
Funding
- 2015 Yeungnam University Research Grant [215A580025]
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [NRF-2015R1C1A1A01052856]
- ''Bulk Nanostructured Metals'' [2201]
- Elements Strategy Initiative for Structural Materials (ESISM), all through the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [22102002]
- [24246114]
- [26630365]
- National Research Foundation of Korea [2015R1C1A1A01052856] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Grants-in-Aid for Scientific Research [15H05767] Funding Source: KAKEN
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A comparative study about the phase stability of equiatomic CoCrFeMnNi alloy of thermodynamic calculation (Thermo-Calc) and experimental result is shown. The alloy was processed by through a highpressure torsion (HPT) process and annealing treatment at temperatures ranging from 900 to 600 C. Phase identification using X-ray diffraction and energy dispersive X-ray spectroscopy indicated that the Cr-rich sigma phase formed during annealing at temperatures lower than 800 degrees C after the HPT process, and fraction of sigma phase increased as decreasing annealing temperature as predicted by Thermo-Calc. The thermodynamic calculation based on the TCFE database was found to be suitable for predicting the possible phases in the CoCrFeMnNi alloy. (C) 2017 Elsevier B.V. All rights reserved.
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