Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys
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...
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| Format: | Article |
| Language: | English |
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Hitit University
2020-06-01
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| Series: | Hittite Journal of Science and Engineering |
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| Online Access: | https://dergipark.org.tr/tr/download/article-file/1506519 |
| _version_ | 1797662649255723008 |
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| author | Ilkay Kalay |
| author_facet | Ilkay Kalay |
| author_sort | Ilkay Kalay |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-11T19:03:23Z |
| format | Article |
| id | doaj.art-714fa9572b4a4699a2fa6ec72923278b |
| institution | Directory Open Access Journal |
| issn | 2148-4171 |
| language | English |
| last_indexed | 2024-03-11T19:03:23Z |
| publishDate | 2020-06-01 |
| publisher | Hitit University |
| record_format | Article |
| series | Hittite Journal of Science and Engineering |
| spelling | doaj.art-714fa9572b4a4699a2fa6ec72923278b2023-10-10T11:17:27ZengHitit UniversityHittite Journal of Science and Engineering2148-41712020-06-017215716210.17350/HJSE19030000184150Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy AlloysIlkay Kalay0Cankaya University, Department of Materials Science and Engineering, Ankara, TurkeyThe 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.https://dergipark.org.tr/tr/download/article-file/1506519high entropy alloysmicrostructuremicrohardnesscompression testmetallic alloys |
| spellingShingle | Ilkay Kalay Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys Hittite Journal of Science and Engineering high entropy alloys microstructure microhardness compression test metallic alloys |
| title | Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys |
| title_full | Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys |
| title_fullStr | Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys |
| title_full_unstemmed | Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys |
| title_short | Microstructure and Mechanical Properties of CoCrFeNi Ti-Al High Entropy Alloys |
| title_sort | microstructure and mechanical properties of cocrfeni ti al high entropy alloys |
| topic | high entropy alloys microstructure microhardness compression test metallic alloys |
| url | https://dergipark.org.tr/tr/download/article-file/1506519 |
| work_keys_str_mv | AT ilkaykalay microstructureandmechanicalpropertiesofcocrfenitialhighentropyalloys |