Microstructure and Wear Behavior of the High‐Velocity‐Oxygen‐Fuel Sprayed and Spark Plasma Sintered High‐Entropy Alloy AlCrFeCoNi | Zendy

Löbel Martin | Zendy; Lindner Thomas | Zendy; Clauß Steffen | Zendy; Pippig Robert | Zendy; Dietrich Dagmar | Zendy; Lampke Thomas | Zendy

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Microstructure and Wear Behavior of the High‐Velocity‐Oxygen‐Fuel Sprayed and Spark Plasma Sintered High‐Entropy Alloy AlCrFeCoNi

Author(s) -

Löbel Martin,

Lindner Thomas,

Clauß Steffen,

Pippig Robert,

Dietrich Dagmar,

Lampke Thomas

Publication year - 2021

Publication title -

advanced engineering materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.938

H-Index - 114

eISSN - 1527-2648

pISSN - 1438-1656

DOI - 10.1002/adem.202001253

Subject(s) - spark plasma sintering , materials science , microstructure , alloy , high entropy alloys , metallurgy , thermal spraying , plasma , calphad , phase (matter) , composite material , phase diagram , chemistry , organic chemistry , physics , quantum mechanics , coating

High‐entropy alloy AlCrFeCoNi powder with a metastable body centered cubic (bcc) structure is produced by inert gas atomization. This state is largely preserved after processing the powder by high‐velocity‐oxygen‐fuel (HVOF) thermal spraying. A heat treatment is conducted with the objective to form a duplex structure comprising a ductile face centered cubic (fcc) phase. The formation of an additional fcc phase is accompanied by a decrease in hardness and a significant improvement of wear resistance. The alternative processing route, spark plasma sintering (SPS), causes a duplex bcc and fcc structure. Detailed analyses of phase formation and wear behavior for all production routes contribute to a better understanding of microstructural effects in high‐entropy alloys.

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