Ultrafine TiB2-TiNiFeCrCoAl high-entropy alloy composite with enhanced mechanical properties

Ultrafine TiB2-TiNiFeCrCoAl high-entropy alloy composite with enhanced mechanical properties

This paper introduces a novel TiB2−10wt% TiNiFeCrCoAl high-entropy alloy (HEA) composite with an enhanced hardness and indentation fracture toughness. Comparing with the traditional TiB2-Ni composite, the addition of TiNiFeCrCoAl HEA can remove the oxide impurities in TiB2 to enhance the sintered de...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2017-08, Vol.702, p.184-188
Hauptverfasser: Fu, Zhezhen, Koc, Rasit
Format: Artikel
Sprache:eng
Schlagworte:
Composite
Entropy
Fracture toughness
Grain size
High entropy alloys
High-entropy alloy
Indentation
Mechanical properties
Studies
Surface energy
TiB2
Titanium base alloys
Titanium diboride
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Koc, Rasit
description This paper introduces a novel TiB2−10wt% TiNiFeCrCoAl high-entropy alloy (HEA) composite with an enhanced hardness and indentation fracture toughness. Comparing with the traditional TiB2-Ni composite, the addition of TiNiFeCrCoAl HEA can remove the oxide impurities in TiB2 to enhance the sintered density; and decrease the solubility of TiB2 in HEA and the solid-liquid surface energy to inhibit the grain growth. The further observation on the microstructure shows the hardening is due to the fine grain size and high contiguity; and the toughening can be attributed to the crack deflection, branching, bridging, and grain pull-out.
doi_str_mv 10.1016/j.msea.2017.07.008
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subjects Composite
Entropy
Fracture toughness
Grain size
High entropy alloys
High-entropy alloy
Indentation
Mechanical properties
Studies
Surface energy
TiB2
Titanium base alloys
Titanium diboride
title Ultrafine TiB2-TiNiFeCrCoAl high-entropy alloy composite with enhanced mechanical properties
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