Victor Geanta, Ionelia Voiculescu, Ioan Milosan, Bogdan Istrate, Ileana Mariana Mates
Chemical Composition Influence on Microhardness, Microstructure and Phase Morphology of AlxCrFeCoNi High Entropy Alloys
Abstract:
The AlCrFeCoNi high entropy alloy exhibits unexpected properties that can be obtained after mixing five different elements, which could not be obtained from any one independent element. The difference to conventional alloys is that these alloys may have, at the same time, both hardness and plasticity, can be used in severe impact applications. In order to study the influence of aluminum content on the microhardness and microstructure of the high entropy alloys AlxCrFeCoNi (x: atomic ratio, x= 0.2 to 2.0) nine types of samples were obtained as mini-sized ingots (50x15x9.5 mm and 40 g weight). The mini-ingots were obtained using arc melt casting process in a vacuum arc remelting device (VAR MRF ABJ 900). The influence of the chemical elements on the microstructure, phases morphology and microhardness of AlxCrFeCoNi system was studied. The results have confirmed that mechanical properties could be greatly adjusted by the chemical composition change. The main element that influences the microhardness of the analyzed system is aluminum, due to the formation of Al-Fe compounds with high hardness. Increasing the aluminum content in the alloy to values greater than 1.8 ... 2 at.% contribute to the increase of hardness and also to the embrittlement thereof. Other elements like Cr, Fe, Co and Ni can contribute to mitigate increasing the hardness of the alloy. The type of phases formed in high entropy alloy are dependent to the aluminum concentration. So, depending on of aluminium content, different phases are obtained, like FCC for low Al content, mixture of FCC and BCC for about 2.5 %Al and BCC for high Al content. The crystallite size depends on the chemical composition and increase with the aluminium content.
Keywords: high entropy alloys; microhardness; microstructure; phases morphology
Cite this article as: GEANTA, V., VOICULESCU, I., MILOSAN, I., ISTRATE, B., MATES, I.M., Chemical Composition Influence on Microhardness, Microstructure and Phase Morphology of AlxCrFeCoNi High Entropy Alloys, Rev. Chim., 69(4), 2018, 798-801.
Vancouver Geanta V, Voiculescu I, Milosan I, Istrate B, Mates IM. Chemical Composition Influence on Microhardness, Microstructure and Phase Morphology of AlxCrFeCoNi High Entropy Alloys. Rev. Chim.[internet]. 2018 Apr;69(4):798-801. Available from: https://doi.org/10.37358/RC.18.4.6203
APA 6th edition Geanta, V., Voiculescu, I., Milosan, I., Istrate, B. & Mates, I.M. (2018). Chemical Composition Influence on Microhardness, Microstructure and Phase Morphology of AlxCrFeCoNi High Entropy Alloys. Revista de Chimie, 69(4), 798-801. https://doi.org/10.37358/RC.18.4.6203
Harvard Geanta, V., Voiculescu, I., Milosan, I., Istrate, B., Mates, I.M. (2018). 'Chemical Composition Influence on Microhardness, Microstructure and Phase Morphology of AlxCrFeCoNi High Entropy Alloys', Revista de Chimie, 69(4), pp. 798-801. https://doi.org/10.37358/RC.18.4.6203
IEEE V. Geanta, I. Voiculescu, I. Milosan, B. Istrate, I.M. Mates, "Chemical Composition Influence on Microhardness, Microstructure and Phase Morphology of AlxCrFeCoNi High Entropy Alloys". Revista de Chimie, vol. 69, no. 4, pp. 798-801, 2018. [online]. https://doi.org/10.37358/RC.18.4.6203
Text Victor Geanta, Ionelia Voiculescu, Ioan Milosan, Bogdan Istrate, Ileana Mariana Mates, Chemical Composition Influence on Microhardness, Microstructure and Phase Morphology of AlxCrFeCoNi High Entropy Alloys, Revista de Chimie, Volume 69, Issue 4, 2018, Pages 798-801, ISSN 2668-8212, https://doi.org/10.37358/RC.18.4.6203. (https://revistadechimie.ro/Articles.asp?ID=6203) Keywords: high entropy alloys; microhardness; microstructure; phases morphology
RIS TY - JOUR T1 - Chemical Composition Influence on Microhardness, Microstructure and Phase Morphology of AlxCrFeCoNi High Entropy Alloys A1 - Geanta, Victor A2 - Voiculescu, Ionelia A3 - Milosan, Ioan A4 - Istrate, Bogdan A5 - Mates, Ileana Mariana JF - Revista de Chimie JO - Rev. Chim. PB - Revista de Chimie SRL SN - 2668-8212 Y1 - 2018 VL - 69 IS - 4 SP - 798 EP - 801 UR - https://doi.org/10.37358/RC.18.4.6203 KW - high entropy alloys KW - microhardness KW - microstructure KW - phases morphology ER -
BibTex @article{RevCh2018P798, author = {Geanta Victor and Voiculescu Ionelia and Milosan Ioan and Istrate Bogdan and Mates Ileana Mariana}, title = {Chemical Composition Influence on Microhardness, Microstructure and Phase Morphology of AlxCrFeCoNi High Entropy Alloys}, journal = {Revista de Chimie}, volume = {69}, number = {4}, pages = {798-801}, year = {2018}, issn = {2668-8212}, doi = {https://doi.org/10.37358/RC.18.4.6203}, url = {https://revistadechimie.ro/Articles.asp?ID=6203} }
