期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 762, 期 -, 页码 29-37出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.05.180
关键词
High-entropy alloys; Powder metallurgy; Microstructures; Mechanical properties
资金
- National Research Foundation (NRF) of Korea - Ministry of Education, Science and Technology [2015R1D1A1A01060718, 2016M2B2A9A02943809, 2017M1A3A3A02015639]
- Leading Foreign Research Institute Recruitment Program through NRF - Ministry of Science, ICT AMP
- Future Planning (MSIP) [2013K1A4A3055679]
- National Research Foundation of Korea [2015R1D1A1A01060718, 2016M2B2A9A02943809, 2017M1A3A3A02015639] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, Al0.15CoCrCuFeNiTix-C (x = 0, 1, 2) high-entropy alloys (HEAs) were produced via powder metallurgy routes, and the microstructural evolution and mechanical properties of the alloys were investigated with respect to the alloys of Ti content. Cr-carbides were formed in the Ti-free alloy, whereas the Ti-containing alloys contained Ti-carbides instead of Cr-carbides because Ti has a higher affinity for C than it does for Cr. Sigma phases were also formed in the Al0.15CoCrCuFeNiTi2-C alloy. The formation of carbides and intermetallic compounds altered the composition and structure of the solid-solution phases. High-energy ball-milling led to the refinement of microstructures to the nanoscale, and the average grain size of the alloys decreased with increasing Ti content because of the grain-boundary pinning effect of TiC. As a result, the Al0.15CoCrCuFeNiTix-C (x = 0, 1, 2) alloys exhibited high strengths of 2047, 2199, and 2877 MPa, respectively. (C) 2018 Elsevier B.V. All rights reserved.
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