Microstructure and compressive properties of AlCrFeCoNi high entropy alloy

High-Entropy Alloys: A Critical Review

“…[62] In terms of their plasticity, values of 30% or higher have been reported. [74] Superplasticity was observed in AlCoCrCuFeNi at 800-1000 • C, and the elongation was between 405 and 800%. [65] Effect of annealing on the mechanical properties of the Al-Co-Cr-Cu-Fe-Ni system depends on the phase transformation involved (see Section 3.4).…”

“…Of all the HEA systems reported, Al-Co-Cr-Cu-Fe-Ni [7,8,21,35,36,49,[60][61][62][63][64][65][66][67][68] and its Cu-free version Al-Co-Cr-Fe-Ni [69][70][71][72][73][74] have been studied most comprehensively. Most of the reported HEA systems emerge from them.…”

“…Additionally, when there is sufficient Al, BCC tend to further decompose to a (Al, Ni)-rich B2 phase and a (Cr, Fe)-rich BCC phase that have almost identical lattice parameters. [8,21,71,74] The Cu-rich phase appears clearly when the concentration of Cu is higher than ∼10 at.%. Its fraction increases with the content of Cu.…”

Influence of Annealing on the Microstructures and Oxidation Behaviors of Al8(CoCrFeNi)92, Al15(CoCrFeNi)85, and Al30(CoCrFeNi)70 High-Entropy Alloys

“…The as-cast phase chemistries are shown in Table 1. [32,35,39]. Similar to the Al 15 HEA, annealing caused significant coarsening of the microstructure.…”

“…This particular alloy system is ideal for a fundamental oxidation study since it contains both Al and Cr, which are known to produce protective Cr 2 O 3 and/or Al 2 O 3 scales [30]. Additionally, the AlCoCrFeNi system is one of the most thoroughly investigated to date [1,4,10,14,[31][32][33][34][35][36][37][38][39][40][41][42][43]. This paper will systematically report the influence of annealing on the microstructures and active oxidation mechanisms.…”