Journal of Powder Materials

Research Article

[Korean]
Fabrication and Alloying Behavior of Ultra-Lightweight AlTiCrVMg High-Entropy Alloy via Al-Mg Mutual Solubility and Sintering Control: Eunhyo Song, Hansung Lee, Byungmin Ahn; J Powder Mater. 2025;32(3):254-261. Published online June 12, 2025; DOI: https://doi.org/10.4150/jpm.2025.00059

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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.

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Effect of annealing temperature on thermal expansion and cryogenic mechanical properties of low-thermal-expansion Co22.2Cr6.2Fe48.8Ni17.8Cu5.0 medium-entropy alloy
Wooyoung Lee, Munsu Choi, Sungwook Kim, Dae-Kyeom Kim, Myungsuk Song, Taek-Soo Kim, Jungwan Lee, Hyoung Seop Kim, Hyunjoo Choi, Soo-Hyun Joo
Materials Science and Engineering: A.2026; 954: 149811. CrossRef

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