Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 868, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159217
Keywords
High-entropy alloy; Mechanical properties; Chemical composition; Nano-scale structure
Categories
Funding
- National Research Foundation of Korea (NRF) - Korean Government (MIST) [2018R1A2B3007167]
- Ministry of Education of the Republic of Korea [2019R1A4A1026125]
- Ministry of Trade
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By adding minor elements, the AlCrFeNi alloy formed a eutectic structure, with a high degree of coherence between B2 and A2 phases in dendritic and lamellar regions in nanostructural evolution, resulting in enhanced mechanical properties.
The AlCrFeNi eutectic high entropy alloys have been developed by adding specific minor elements such as 1, 3, 5 at% of Mo and Ti to analyze the mechanical behavior with double phase strengthening. The X-ray diffraction results illustrate that the crystal structure includes dual phases such as B2 and BCC. Regarding on the compositional variation, the formation of eutectic structure was observed by adding minor elements. The detailed investigation of nano structural evolution of the alloy identified that the morphology of na-noscale Al-Ni-rich B2 phase and Cr-Fe-rich A2 phase have a high degree of coherence in dendritic and lamellar regions. As the result of volume fraction changes and variation in grain size on the nanoscale with the addition of minor elements, the enhancement of mechanical properties confirmed the high-temperature hardness behavior of the alloys. In this study, nanoscale features of the AlCrFeNi based HEAs and mechanical characteristics were explored in detail. (C) 2021 Elsevier B.V. All rights reserved.
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