Development of novel lightweight dual-phase Al-Ti-Cr-Mn-V medium-entropy alloys with high strength and ductility
Journal
Entropy
Journal Volume
22
Journal Issue
1
Start Page
74
ISSN
10994300
Date Issued
2020
Author(s)
Liao, Yu-Chin
Chen, Po-Sung
Li, Chao-Hsiu
Tsai, Pei-Hua
Jang, Jason S. C.
Hsieh, Ker-Chang
Chen, Chih-Yen
Lin, Ping-Hung
Huang, Jacob C.
Lo, Yu-Chieh
Huang, Chang-Wei
Tsao, I-Yu
Abstract
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/cm3. 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/cm3) 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. © 2020 by the authors.
Subjects
High-entropy alloy
Lightweight alloy
Mechanical property
Medium-entropy alloy
Publisher
MDPI AG
Type
journal article