Microstructure and mechanical properties of lightweight AlCrTiV0.5Cux high-entropy alloys

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

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Author(s)

  • Zhen Peng
  • Zai-Bin Luo
  • Bao-Wei Li
  • Jin-Feng Li
  • Heng-Wei Luan
  • And 3 others
  • Jia-Lun Gu
  • Yuan Wu
  • Ke-Fu Yao

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)2016–2020
Journal / PublicationRare Metals
Volume41
Issue number6
Online published20 Mar 2022
Publication statusPublished - Jun 2022

Abstract

High-entropy alloys (HEAs) are an emerging and rapidly developing family of alloys with appealing properties such as lightweight HEAs with excellent mechanical properties. In this study, to obtain lightweight HEAs with exceptional hardness, we prepared AlCrTiV0.5Cux ( x =  0, 0.2, 0.4, 0.6, 0.8 and 1.0, denoted as Cu0, Cu0.2, Cu0.4, Cu0.6, Cu0.8 and Cu1.0 alloys, respectively) HEAs and analyzed their microstructure and hardness. The prepared HEAs demonstrated a body-centered cubic (BCC) phase with no Cu addition and BCC + face-centered cubic (FCC) + hexagonal close-packed (HCP) phases in the Cu0.2 and Cu0.4 alloys and FCC + HCP phases with continuous Cu addition. All HEAs exhibited a clear dendrite microstructure, and the dendrites were refined with Cu addition. The hardness significantly increased with the addition of small amounts of Cu (Cu0.2), but gradually decreased with continuous Cu addition. Cu0.2 HEA was the hardest with a specific hardness (hardness/density) of 0.1628 HV·m3·kg−1, which is significantly higher than those of conventional metallic materials. AlCrTiV0.5Cux HEAs have similar wear resistance properties with H13 die steel; therefore, they can be employed as promising lightweight high hardness materials.

Citation Format(s)

Microstructure and mechanical properties of lightweight AlCrTiV0.5Cux high-entropy alloys. / Peng, Zhen; Luo, Zai-Bin; Li, Bao-Wei; Li, Jin-Feng; Luan, Heng-Wei; Gu, Jia-Lun; Wu, Yuan; Yao, Ke-Fu.

In: Rare Metals, Vol. 41, No. 6, 06.2022, p. 2016–2020.

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