Proceedings of the International Conference Recent Advances in Materials, Processes and Technology for Sustainability (RAMPTS 2025)

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Characterization of high entropy alloy reinforced AA7068 Composite developed through stir casting

Authors
Drisya Santhosh1, *, M. D. Bindu1
1Department of Mechanical Engineering, Government Engineering College Thrissur, 680009, Thrissur, Kerala, India
*Corresponding author. Email: drisyasan000@gmail.com
Corresponding Author
Drisya Santhosh
Available Online 25 December 2025.
DOI
10.2991/978-94-6463-922-3_33How to use a DOI?
Keywords
AA 7068; HEA; Composite
Abstract

In this study, Aluminium alloy 7068 was reinforced with 2 wt.% AlCoCrFeNi high entropy alloy (HEA) powder using the stir casting technique. The HEA powder was synthesized via mechanical alloying, and after 15 h of ball milling, a combined FCC-BCC solid solution phase was obtained. Scanning electron microscopy (SEM) revealed a reduction in particle size to 8.97 µm. The incorporation of HEA powder into the AA7068 matrix led to notable improvements in mechanical properties. Tensile testing showed a 6.9% increase in ultimate tensile strength (UTS) compared to the base alloy, while microhardness measurements indicated a 14.69% increase in Vickers hardness (HV). Microstructural analysis revealed grain refinement due to the HEA addition. Furthermore, the wear rate of the composite was lower than that of the unreinforced AA7068 alloy. These enhancements suggest that the AA7068–HEA composite has strong potential for advanced structural and engineering applications.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the International Conference Recent Advances in Materials, Processes and Technology for Sustainability (RAMPTS 2025)
Series
Atlantis Highlights in Material Sciences and Technology
Publication Date
25 December 2025
ISBN
978-94-6463-922-3
ISSN
2590-3217
DOI
10.2991/978-94-6463-922-3_33How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Drisya Santhosh
AU  - M. D. Bindu
PY  - 2025
DA  - 2025/12/25
TI  - Characterization of high entropy alloy reinforced AA7068 Composite developed through stir casting
BT  - Proceedings of the International Conference Recent Advances in Materials, Processes and Technology for Sustainability (RAMPTS 2025)
PB  - Atlantis Press
SP  - 490
EP  - 502
SN  - 2590-3217
UR  - https://doi.org/10.2991/978-94-6463-922-3_33
DO  - 10.2991/978-94-6463-922-3_33
ID  - Santhosh2025
ER  -