Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys

Ilkay Kalay

doi:10.17350/HJSE19030000184

EN

Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys

Abstract

The structure and mechanical properties of CoCrFeNi and CoCrFeNiTi0.5Al0.5 in molar ratio high entropy alloys were investigated using X-ray diffraction XRD , optical microscope OM , scanning electron microscope SEM , hardness and compression tests. With the addition of Ti and Al, the crystal structure of CoCrFeNi changed from FCC to a mixture of FCC and double BCC structures. The lattice parameter of FCC increases upon addition of Al and Ti. The microstructure analysis shows the morphological transition of dendrites from non-equiaxed to equiaxed during the suction casting of CoCrFeNiTi0.5Al0.5 alloy. The Vickers microhardness testing of CoCr-FeNi alloy reveals significant increase in hardness with the addition of Al and Ti. The hardness values are improved in as-suction cast CoCrFeNi and CoCrFeNiTi0.5Al 0.5 alloys compared to their ascast alloys due to strengthening. The CoCrFeNiTi0.5Al0.5 alloy yields at 1997 MPa and fails at 2344 MPa. The fracture mechanism of CoCrFeNiTi0.5Al 0.5 alloy reveals a cleavage mode.

Keywords

High entropy alloys,Microstructure,Microhardness,Compression test,Metallic alloys

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Details

Primary Language

English

Subjects

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Journal Section

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Authors

Ilkay Kalay This is me

Publication Date

June 26, 2020

Submission Date

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Acceptance Date

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Published in Issue

Year 2020 Volume: 7 Number: 2

DOI

https://doi.org/10.17350/HJSE19030000184

IZ

https://izlik.org/JA93AR65ZT

Cite

RIS / Bibtex

APA

Kalay, I. (2020). Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys. Hittite Journal of Science and Engineering, 7(2), 157-162. https://doi.org/10.17350/HJSE19030000184

AMA

1.Kalay I. Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys. Hittite J Sci Eng. 2020;7(2):157-162. doi:10.17350/HJSE19030000184

Chicago

Kalay, Ilkay. 2020. “Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys”. Hittite Journal of Science and Engineering 7 (2): 157-62. https://doi.org/10.17350/HJSE19030000184.

EndNote

Kalay I (June 1, 2020) Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys. Hittite Journal of Science and Engineering 7 2 157–162.

IEEE

[1]I. Kalay, “Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys”, Hittite J Sci Eng, vol. 7, no. 2, pp. 157–162, June 2020, doi: 10.17350/HJSE19030000184.

ISNAD

Kalay, Ilkay. “Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys”. Hittite Journal of Science and Engineering 7/2 (June 1, 2020): 157-162. https://doi.org/10.17350/HJSE19030000184.

JAMA

1.Kalay I. Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys. Hittite J Sci Eng. 2020;7:157–162.

MLA

Kalay, Ilkay. “Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys”. Hittite Journal of Science and Engineering, vol. 7, no. 2, June 2020, pp. 157-62, doi:10.17350/HJSE19030000184.

Vancouver

1.Ilkay Kalay. Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys. Hittite J Sci Eng. 2020 Jun. 1;7(2):157-62. doi:10.17350/HJSE19030000184

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