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Revista de Chimie (Rev. Chim.), Year 2018, Volume 69, Issue 4, 798-801

https://doi.org/10.37358/RC.18.4.6203

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

Issue: 2018, Volume 69, Issue 4
Pages: 798-801
Publication date: 2018/5/15
https://doi.org/10.37358/RC.18.4.6203
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Creative Commons License
This article is published under the Creative Commons Attribution 4.0 International License
Citation Styles
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}
}
 
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