Phase Composition and Superplastic Behavior of a Wrought AlCoCrCuFeNi High-Entropy Alloy

被引：111
|
作者：
Shaysultanov, D. G. [1 ]
Stepanov, N. D. [1 ]
Kuznetsov, A. V. [1 ]
Salishchev, G. A. [1 ]
Senkov, O. N. [2 ]
机构：
[1] Belgorod State Univ, Lab Bulk Nanostructured Mat, Belgorod 308015, Russia
[2] UES Inc, Dayton, OH 45432 USA
来源：
JOM | 2013年 / 65卷 / 12期
关键词：
MECHANICAL-PROPERTIES; COMPRESSIVE PROPERTIES; SOLID-SOLUTION; MICROSTRUCTURE; DIFFUSION; TEMPERATURE;
D O I：
10.1007/s11837-013-0754-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A cast AlCoCrCuFeNi high-entropy alloy was multiaxially forged at 950A degrees C to produce a fine homogeneous mixture of grains/particles of four different phases with the average size of similar to 2.1 mu m. The forged alloy exhibited unusual superplastic behavior accompanied by a pronounced softening stage, followed by a steady-state flow stage, during tensile deformation at temperatures of 800A degrees C-1000A degrees C and at strain rates of 10(-4)-10(-1) s(-1). Despite the softening stage, no noticeable strain localization was observed and a total elongation of up to 1240% was obtained. A detailed analysis of the phase composition and microstructure of the alloy before and after superplastic deformation was conducted, the strain rate and temperature dependences of the flow stress were determined at different stages of the superplastic deformation, and the relationships between the microstructure and properties were identified and discussed.
引用
收藏
页码：1815 / 1828
页数：14
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