Effect of iron content on the structure and mechanical properties of Al 25 Ti 25 Ni 25 Cu 25 and (AlTi) 60-x Ni 20 Cu 20 Fe x (x=15, 20) high-entropy alloys

Fazakas, V. Zadorozhnyy, D. V. Louzguine-Luzgin

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

In this work, we investigated the microstructure and mechanical properties of Al 25 Ti 25 Ni 25 C u25 Al 22.5 Ti 22.5 Ni 20 Cu 20 Fe 15 and Al 20 Ti 20 Ni 20 Cu 20 Fe 20 high entropy alloys, produced by arc melting and casting in an inert atmosphere. The structure of these alloys was studied by X-ray diffractometry and scanning electron microscopy. The as-cast alloys were heat treated at 773, 973 and 1173 K for 1800 s to investigate the effects of aging on the plasticity, hardness and elastic properties. Compared to the conventional high-entropy alloys the Al 25 Ti 25 Ni 25 Cu 25 , Al 22.5 Ti 22.5 Ni 20 Cu 20 Fe 15 and Al 20 Ti 20 Ni 20 Cu 20 Fe 20 alloys are relatively hard and ductile. Being heat treated at 973 K the Al 22.5 Ti 22.5 Ni 20 Cu 20 Fe 15 alloy shows considerably high strength and relatively homogeneous deformation under compression. The plasticity, hardness and elastic properties of the studied alloys depend on the fraction and intrinsic properties of the constituent phases. Significant hardening effect by the annealing is found.

Original languageEnglish
Pages (from-to)549-555
Number of pages7
JournalApplied Surface Science
Volume358
DOIs
Publication statusPublished - 2015 Dec 15

Keywords

  • Casting
  • Mechanical properties
  • Multicomponent alloys
  • Scanning elelctron microscopy
  • X-ray diffraction

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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