Effects of annealing on microstructure, mechanical and electrical properties of AlCrCuFeMnTi high entropy alloy

Zhisheng Nong, Jingchuan Zhu, Xiawei Yang, Hailing Yu, Zhonghong Lai

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14 Scopus citations

Abstract

The multi-component AlCrCuFeMnTi high entropy alloy was prepared using a vacuum arc melting process. Serial annealing processes were subsequently performed at 590 C, 750 C, 955 C and 1 100 C respectively with a holding time of 4 h at each temperature. The effects of annealing on microstructure, mechanical and electrical properties of as-cast alloy were investigated by using differential thermal analysis (DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The experimental results show that two C14 hexagonal structures remain unchanged after annealing the as-cast AlCrCuFeMnTi alloy specimens being heated to 1 100 C. Both annealed and as-cast microstructures show typical cast-dendrite morphology and similar elemental segregation. The hardness of alloys declines as the annealing temperature increases while the strength of as-cast alloy improves obviously by the annealing treatment. The electrical conductivities of annealed and as-cast alloys are influenced by the distribution of interdendrite regions which is rich in Cu element.

Original languageEnglish
Pages (from-to)1196-1200
Number of pages5
JournalJournal Wuhan University of Technology, Materials Science Edition
Volume28
Issue number6
DOIs
StatePublished - Dec 2013
Externally publishedYes

Keywords

  • annealing
  • electrical conductivity
  • high entropy alloy
  • mechanical properties
  • microstructure

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