CoNiFeNb0.45 eutectic multi-principal element alloy with excellent mechanical properties and corrosion resistance

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

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Author(s)

  • Xulong An
  • Chengling Chu
  • Hui Zhao
  • Baolong Shen
  • Liang Zhou

Detail(s)

Original languageEnglish
Article number139026
Journal / PublicationMaterials Science and Engineering A
Volume777
Online published5 Feb 2020
Publication statusPublished - 10 Mar 2020

Abstract

A novel CoNiFeNb0.45 eutectic multi-principal element alloy (EMPEA) with a dual-phase structure is designed and synthesized by arc melting and suction casting. The compression strength of the CoNiFeNb0.45 EMPEA is 2.5 GPa at room temperature and high compression strength (1.2 GPa), furthermore, the excellent ductility with 40% fracture strain are maintained at 700 °C. The dislocation walls in the soft fcc phase provide the CoNiFeNb0.45 EMPEA with high ductility and work hardening, while the dislocations pined in the fcc/laves phase boundaries provide the alloy with high strength. The CoNiFeNb0.45 EMPEA also has excellent corrosion resistance in 3.5 wt% NaCl at room temperature as manifested by a corrosion rate of merely 0.003 mm/y and activation energy of corrosion of 53.6 kJ/mol.

Research Area(s)

  • CoNiFeNb0.45, Corrosion resistance, Eutectic multi-principal element alloy (EMPEA), Mechanical properties

Citation Format(s)