Development of novel lightweight dual-phase Al-Ti-Cr-Mn-V medium-entropy alloys with high strength and ductility

Yu Chin Liao, Po Sung Chen, Chao Hsiu Li, Pei Hua Tsai, Jason S.C. Jang*, Ker Chang Hsieh, Chih Yen Chen, Ping Hung Lin, Jacob C. Huang*, Hsin Jay Wu, Yu Chieh Lo, Chang Wei Huang, I. Yu Tsao

*Corresponding author for this work

Research output: Contribution to journalArticle

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.

Original languageEnglish
Number of pages1
JournalEntropy
Volume22
Issue number1
DOIs
StatePublished - 6 Jan 2020

Keywords

  • High-entropy alloy
  • Lightweight alloy
  • Mechanical property
  • Medium-entropy alloy

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