Effects of Graphite Addition on Structure and Properties of CrCuFeNiTiAl<sub>1</sub> High-Entropy Alloys
In this study, the CrCuFeNiTiAl<sub>1</sub> equiatomic alloy was used as a base, which was modified by adding graphite in proportions of 0.5, 1.0, 2.5, and 5.0 mol%. The samples were obtained by powder metallurgy and sintering at 1200 °C for 2 h in a furnace with a protective argon atmos...
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MDPI AG
2025-05-01
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| author | Sergio Antonio García-Estrada Ivanovich Estrada-Guel Carlos Gamaliel Garay-Reyes Cynthia Deisy Gómez-Esparza Roberto Martínez-Sánchez José Adalberto Castillo-Robles José Amparo Rodríguez-García Carlos Adrián Calles-Arriaga Enrique Rocha-Rangel |
| author_facet | Sergio Antonio García-Estrada Ivanovich Estrada-Guel Carlos Gamaliel Garay-Reyes Cynthia Deisy Gómez-Esparza Roberto Martínez-Sánchez José Adalberto Castillo-Robles José Amparo Rodríguez-García Carlos Adrián Calles-Arriaga Enrique Rocha-Rangel |
| author_sort | Sergio Antonio García-Estrada |
| collection | DOAJ |
| description | In this study, the CrCuFeNiTiAl<sub>1</sub> equiatomic alloy was used as a base, which was modified by adding graphite in proportions of 0.5, 1.0, 2.5, and 5.0 mol%. The samples were obtained by powder metallurgy and sintering at 1200 °C for 2 h in a furnace with a protective argon atmosphere. Structural characterization was performed by XRD. A microstructural evaluation was conducted by SEM. The best mechanical microhardness and compressive strength results were obtained in the samples with the lowest amounts of graphite (238 μHV and 1000 MPa, respectively). The density values showed that samples with low amounts of graphite had better densification, lower porosity, and finer structural characteristics than those with graphite percentages higher than 1 mol%. The XRD studies determined the formation of a mixture of crystalline structures composed of FCC due to the presence of Cu, Ni, and Al metals; BCC due to Fe and Cr metals; and HCP due to Ti, and the formation of a Cr<sub>7</sub>C<sub>3</sub> compound. SEM analysis showed the formation of cracks and porosity due to the formation of carbides. |
| format | Article |
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| institution | Kabale University |
| issn | 2673-4117 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| series | Eng |
| spelling | doaj-art-e930270606da428e9f2e2630a8b923132025-08-20T03:24:37ZengMDPI AGEng2673-41172025-05-016611210.3390/eng6060112Effects of Graphite Addition on Structure and Properties of CrCuFeNiTiAl<sub>1</sub> High-Entropy AlloysSergio Antonio García-Estrada0Ivanovich Estrada-Guel1Carlos Gamaliel Garay-Reyes2Cynthia Deisy Gómez-Esparza3Roberto Martínez-Sánchez4José Adalberto Castillo-Robles5José Amparo Rodríguez-García6Carlos Adrián Calles-Arriaga7Enrique Rocha-Rangel8Departamento de Investigación y Posgrado, Universidad Politécnica de Victoria, Ciudad Victoria 87138, MexicoDepartamento de Física de Materiales, Metalurgia e Integridad Estructural, Centro de Investigación en Materiales Avanzados, CIMAV, Miguel de Cervantes 120, Chihuahua 31136, MexicoDepartamento de Física de Materiales, Metalurgia e Integridad Estructural, Centro de Investigación en Materiales Avanzados, CIMAV, Miguel de Cervantes 120, Chihuahua 31136, MexicoFacultad de Ingeniería, Universidad Autónoma de Chihuahua, Chihuahua 31125, MexicoDepartamento de Física de Materiales, Metalurgia e Integridad Estructural, Centro de Investigación en Materiales Avanzados, CIMAV, Miguel de Cervantes 120, Chihuahua 31136, MexicoDepartamento de Investigación y Posgrado, Universidad Politécnica de Victoria, Ciudad Victoria 87138, MexicoDepartamento de Investigación y Posgrado, Universidad Politécnica de Victoria, Ciudad Victoria 87138, MexicoDepartamento de Investigación y Posgrado, Universidad Politécnica de Victoria, Ciudad Victoria 87138, MexicoDepartamento de Investigación y Posgrado, Universidad Politécnica de Victoria, Ciudad Victoria 87138, MexicoIn this study, the CrCuFeNiTiAl<sub>1</sub> equiatomic alloy was used as a base, which was modified by adding graphite in proportions of 0.5, 1.0, 2.5, and 5.0 mol%. The samples were obtained by powder metallurgy and sintering at 1200 °C for 2 h in a furnace with a protective argon atmosphere. Structural characterization was performed by XRD. A microstructural evaluation was conducted by SEM. The best mechanical microhardness and compressive strength results were obtained in the samples with the lowest amounts of graphite (238 μHV and 1000 MPa, respectively). The density values showed that samples with low amounts of graphite had better densification, lower porosity, and finer structural characteristics than those with graphite percentages higher than 1 mol%. The XRD studies determined the formation of a mixture of crystalline structures composed of FCC due to the presence of Cu, Ni, and Al metals; BCC due to Fe and Cr metals; and HCP due to Ti, and the formation of a Cr<sub>7</sub>C<sub>3</sub> compound. SEM analysis showed the formation of cracks and porosity due to the formation of carbides.https://www.mdpi.com/2673-4117/6/6/112high-entropy alloymulticomponentmicrostructurestructuregraphite |
| spellingShingle | Sergio Antonio García-Estrada Ivanovich Estrada-Guel Carlos Gamaliel Garay-Reyes Cynthia Deisy Gómez-Esparza Roberto Martínez-Sánchez José Adalberto Castillo-Robles José Amparo Rodríguez-García Carlos Adrián Calles-Arriaga Enrique Rocha-Rangel Effects of Graphite Addition on Structure and Properties of CrCuFeNiTiAl<sub>1</sub> High-Entropy Alloys Eng high-entropy alloy multicomponent microstructure structure graphite |
| title | Effects of Graphite Addition on Structure and Properties of CrCuFeNiTiAl<sub>1</sub> High-Entropy Alloys |
| title_full | Effects of Graphite Addition on Structure and Properties of CrCuFeNiTiAl<sub>1</sub> High-Entropy Alloys |
| title_fullStr | Effects of Graphite Addition on Structure and Properties of CrCuFeNiTiAl<sub>1</sub> High-Entropy Alloys |
| title_full_unstemmed | Effects of Graphite Addition on Structure and Properties of CrCuFeNiTiAl<sub>1</sub> High-Entropy Alloys |
| title_short | Effects of Graphite Addition on Structure and Properties of CrCuFeNiTiAl<sub>1</sub> High-Entropy Alloys |
| title_sort | effects of graphite addition on structure and properties of crcufenitial sub 1 sub high entropy alloys |
| topic | high-entropy alloy multicomponent microstructure structure graphite |
| url | https://www.mdpi.com/2673-4117/6/6/112 |
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