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

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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
Pages (from-to)74
Number of pages1
JournalEntropy
Volume22
Issue number1
DOIs
StatePublished - 1 Jan 2020

Keywords

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

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