Effect of Particles on the Mechanical Behaviour of CoCrFeNiAl0.3 High-Entropy Alloy Single Crystals

被引：1

作者：

Kireeva, Irina ^{[1
]}

Chumlyakov, Yury ^{[1
]}

Vyrodova, Anna ^{[1
]}

Pobedennaya, Zinaida ^{[1
]}

Poklonov, Vyacheslav ^{[1
]}

Bessonova, Irina ^{[1
]}

Kuksgauzen, Dmitriy ^{[1
]}

机构：

[1] Natl Res Tomsk State Univ, Siberian Phys Tech Inst, Tomsk 634050, Russia

来源：

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019 | 2019年 / 2167卷

基金：

俄罗斯科学基金会;

关键词：

D O I：

10.1063/1.5132026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of gamma'-phase particles on the mechanical behaviour was studied in single crystals of the fcc CoCrFeNiAl0.3 (at %) high-entropy alloy (HEA) under tensile strain. It was shown that ageing of the CoCrFeNiAl0.3 HEA single crystals at a temperature of 823 K for 150 hours and at 893 K for 50 hours, results in the precipitation of gamma'-phase particles of size d < 5 nm, with L1(2)-type ordering. In the [<(1)over bar>11]-oriented crystals, precipitation of gamma'-phase particles leads to an increase in critical shear stresses tau(cr) by 25-30 MPa in the temperature range T = 77-873 K, a decrease in the strain hardening coefficient Theta = d sigma/d epsilon and an increase in plasticity of 11-14% relative to the initial crystals without particles. The decrease in Theta = d sigma/d epsilon and the increase in plasticity are associated with the influence of the gamma'-phase particles on the localization of the deformation, predominantly in one system.

引用

页数：4

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