Journal
ENTROPY
Volume 22, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/e22010074
Keywords
high-entropy alloy; medium-entropy alloy; lightweight alloy; mechanical property
Categories
Funding
- Ministry of Science and Technology of Taiwan (MOST) [MOST 107-2218-E-008-015]
- City University of Hong Kong [9380088, 7005078]
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A novel lightweight Al-Ti-Cr-Mn-V medium-entropy alloy (MEA) system was developed using a nonequiatiomic approach and alloys were produced through arc melting and drop casting. These alloys comprised a body-centered cubic (BCC) and face-centered cubic (FCC) dual phase with a density of approximately 4.5 g/cm(3). However, the fraction of the BCC phase and morphology of the FCC phase can be controlled by incorporating other elements. The results of compression tests indicated that these Al-Ti-Cr-Mn-V alloys exhibited a prominent compression strength (1940 MPa) and ductility (30%). Moreover, homogenized samples maintained a high compression strength of 1900 MPa and similar ductility (30%). Due to the high specific compressive strength (0.433 GPag /cm(3)) and excellent combination of strength and ductility, the cast lightweight Al-Ti-Cr-Mn-V MEAs are a promising alloy system for application in transportation and energy industries.
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