Development of novel lightweight Al-Rich Quinary medium-entropy alloys with high strength and ductility

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Po-Sung Chen
  • Yu-Chin Liao
  • Yen-Ting Lin
  • Pei-Hua Tsai
  • Jason S. C. Jang
  • Ker-Chang Hsieh
  • Chih-Yen Chen
  • Hsin-Jay Wu
  • I-Yu Tsao

Detail(s)

Original languageEnglish
Article number4223
Journal / PublicationMaterials
Volume14
Issue number15
Online published28 Jul 2021
Publication statusPublished - Aug 2021

Link(s)

Abstract

Most high-entropy alloys and medium-entropy alloys (MEAs) possess outstanding mechanical properties. In this study, a series of lightweight nonequiatomic Al50–Ti–Cr–Mn–V MEAs with a dual phase were produced through arc melting and drop casting. These cast alloys were composed of body-centered cubic and face-centered cubic phases. The density of all investigated MEAs was less than 5 g/cm3 in order to meet energy and transportation industry requirements. The effect of each element on the microstructure evolution and mechanical properties of these MEAs was investigated. All the MEAs demonstrated outstanding compressive strength, with no fractures observed after a compressive strain of 20%. Following the fine-tuning of the alloy composition, the Al50Ti20Cr10Mn15V5 MEA exhibited the most compressive strength (~1800 MPa) and ductility (~34%). A significant improvement in the mechanical compressive properties was achieved (strength of ~2000 MPa, strain of ~40%) after annealing (at 1000 °C for 0.5 h) and oil-quenching. With its extremely high specific compressive strength (452 MPa·g/cm3) and ductility, the lightweight Al50Ti20Cr10Mn15V5 MEA demonstrates good potential for energy or transportation applications in the future.

Research Area(s)

  • Dual phase, Heat treatment, Lightweight, Medium-entropy alloy, Nonequiatomic

Citation Format(s)

Development of novel lightweight Al-Rich Quinary medium-entropy alloys with high strength and ductility. / Chen, Po-Sung; Liao, Yu-Chin; Lin, Yen-Ting; Tsai, Pei-Hua; Jang, Jason S. C.; Hsieh, Ker-Chang; Chen, Chih-Yen; Huang, Jacob C.; Wu, Hsin-Jay; Tsao, I-Yu.

In: Materials, Vol. 14, No. 15, 4223, 08.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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