Study of phase evolution and phase stability in a novel FCC based Al30Ti35Mg5V10Fe8Cr12 lightweight high-entropy alloy processed by mechanical alloying
High-entropy alloys (HEAs) have gained significant attention from researchers due to their exceptional mechanical properties. While most the reported lightweight high-entropy alloys have Body Centered Cubic (BCC), Hexagonal Close Packed (HCP), and complex intermetallic phases, there is growing inter...
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Elsevier
2025-03-01
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| Series: | Journal of Alloys and Metallurgical Systems |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949917824000919 |
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| author | Ayush Sourav Ankit Singh Negi Pranjal Chauhan T. Sudeep Kumar Shanmugasundaram Thangaraju |
| author_facet | Ayush Sourav Ankit Singh Negi Pranjal Chauhan T. Sudeep Kumar Shanmugasundaram Thangaraju |
| author_sort | Ayush Sourav |
| collection | DOAJ |
| description | High-entropy alloys (HEAs) have gained significant attention from researchers due to their exceptional mechanical properties. While most the reported lightweight high-entropy alloys have Body Centered Cubic (BCC), Hexagonal Close Packed (HCP), and complex intermetallic phases, there is growing interest in development of Face Centered Cubic (FCC) based Lightweight High-Entropy Alloys (LWHEA) for applications prioritizing energy efficiency. In this study, a design strategy for synthesizing a stable FCC-based LWHEA through multivariate optimization of elements and thermodynamic parameters was presented. A novel Al30Ti35Mg5V10Fe8Cr12 LWHEA was designed and processed through a mechanical alloying route with a theoretical density of 4.5 g/cc. The compaction of the alloy was performed by spark plasma sintering (SPS) at 890 ℃ and 60 MPa for 15 minutes. The hardness of sintered sample was found to be 550 ± 18 HV (5.3 GPa). Microstructural evolution of the alloy was studied using X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The microstructural analysis of alloy revealed that a combination of FCC and BCC phases are present in milled sample as well as sintered sample. The phase stability was explained through Gibbs free energy calculations of competing phases. |
| format | Article |
| id | doaj-art-94e28bde4e2840fba4f47c3da8baf4c4 |
| institution | DOAJ |
| issn | 2949-9178 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Alloys and Metallurgical Systems |
| spelling | doaj-art-94e28bde4e2840fba4f47c3da8baf4c42025-08-20T02:55:48ZengElsevierJournal of Alloys and Metallurgical Systems2949-91782025-03-01910014210.1016/j.jalmes.2024.100142Study of phase evolution and phase stability in a novel FCC based Al30Ti35Mg5V10Fe8Cr12 lightweight high-entropy alloy processed by mechanical alloyingAyush Sourav0Ankit Singh Negi1Pranjal Chauhan2T. Sudeep Kumar3Shanmugasundaram Thangaraju4Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune, IndiaDepartment of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune, IndiaDepartment of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune, IndiaDepartment of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune, India; Siddaganga Institute of Technology, Tumakuru, IndiaDepartment of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune, India; Corresponding author.High-entropy alloys (HEAs) have gained significant attention from researchers due to their exceptional mechanical properties. While most the reported lightweight high-entropy alloys have Body Centered Cubic (BCC), Hexagonal Close Packed (HCP), and complex intermetallic phases, there is growing interest in development of Face Centered Cubic (FCC) based Lightweight High-Entropy Alloys (LWHEA) for applications prioritizing energy efficiency. In this study, a design strategy for synthesizing a stable FCC-based LWHEA through multivariate optimization of elements and thermodynamic parameters was presented. A novel Al30Ti35Mg5V10Fe8Cr12 LWHEA was designed and processed through a mechanical alloying route with a theoretical density of 4.5 g/cc. The compaction of the alloy was performed by spark plasma sintering (SPS) at 890 ℃ and 60 MPa for 15 minutes. The hardness of sintered sample was found to be 550 ± 18 HV (5.3 GPa). Microstructural evolution of the alloy was studied using X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The microstructural analysis of alloy revealed that a combination of FCC and BCC phases are present in milled sample as well as sintered sample. The phase stability was explained through Gibbs free energy calculations of competing phases.http://www.sciencedirect.com/science/article/pii/S2949917824000919High entropy alloyLightweightMechanical alloyingMicrostructural evolutionGibbs free energy |
| spellingShingle | Ayush Sourav Ankit Singh Negi Pranjal Chauhan T. Sudeep Kumar Shanmugasundaram Thangaraju Study of phase evolution and phase stability in a novel FCC based Al30Ti35Mg5V10Fe8Cr12 lightweight high-entropy alloy processed by mechanical alloying Journal of Alloys and Metallurgical Systems High entropy alloy Lightweight Mechanical alloying Microstructural evolution Gibbs free energy |
| title | Study of phase evolution and phase stability in a novel FCC based Al30Ti35Mg5V10Fe8Cr12 lightweight high-entropy alloy processed by mechanical alloying |
| title_full | Study of phase evolution and phase stability in a novel FCC based Al30Ti35Mg5V10Fe8Cr12 lightweight high-entropy alloy processed by mechanical alloying |
| title_fullStr | Study of phase evolution and phase stability in a novel FCC based Al30Ti35Mg5V10Fe8Cr12 lightweight high-entropy alloy processed by mechanical alloying |
| title_full_unstemmed | Study of phase evolution and phase stability in a novel FCC based Al30Ti35Mg5V10Fe8Cr12 lightweight high-entropy alloy processed by mechanical alloying |
| title_short | Study of phase evolution and phase stability in a novel FCC based Al30Ti35Mg5V10Fe8Cr12 lightweight high-entropy alloy processed by mechanical alloying |
| title_sort | study of phase evolution and phase stability in a novel fcc based al30ti35mg5v10fe8cr12 lightweight high entropy alloy processed by mechanical alloying |
| topic | High entropy alloy Lightweight Mechanical alloying Microstructural evolution Gibbs free energy |
| url | http://www.sciencedirect.com/science/article/pii/S2949917824000919 |
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