High-entropy alloys (HEAs) incorporating low-melting-point elements (Mg and Al) and high-melting-point elements (Ti, Cr, and V) were fabricated via mechanical alloying and spark plasma sintering. Sintering temperatures were varied to investigate phase behavior and microstructural evolution. X-ray diffraction was used to identify phase structures, scanning electron microscopy to analyze microstructures, X-ray fluorescence to determine elemental composition, and a gas pycnometer to measure density. Micro-Vickers hardness testing was conducted to evaluate mechanical properties. Mechanical-alloyed HEAs exhibited a body-centered cubic (BCC) phase and lamellar structures with element-enriched regions. Sintering introduced additional BCC and Laves phases, while higher temperatures promoted Mg liquid-phase sintering, increasing density and hardness. This study highlights the effects of sintering on HEAs containing elements with differing melting points to optimize their properties.

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
Funding
Conflict of Interest
Data Availability Statement
Author Information and Contribution
Acknowledgments
References

• 송은효(아주대학교 에너지시스템학과) | Eunhyo Song (Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea)
• 안병민(아주대학교 에너지시스템학과, 아주대학교 첨단신소재공학과) | Byungmin Ahn (Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea, Department of Materials Science & Engineering, Ajou University, Suwon, 16499, Republic of Korea) Corresponding author
• 이한성(아주대학교 첨단신소재공학과) | Hansung Lee (Department of Materials Science & Engineering, Ajou University, Suwon, 16499, Republic of Korea)