Processing and properties of nanocrystalline CuNiCoZnAlTi high entropy alloys by mechanical alloying

被引：230

作者：

Varalakshmi, S. ^{[1
]}

Kamaraj, M. ^{[1
]}

Murty, B. S. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 4-5期

关键词：

High entropy alloy; Mechanical alloying; Nanostructure; Multicomponent system; Transmission electron microscopy; Vacuum hot pressing; MICROSTRUCTURE;

D O I：

10.1016/j.msea.2009.09.019

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The present study describes the synthesis of nanocrystalline equiatomic CuNiCoZnAlTi high entropy alloy by mechanical alloying and characterized by XRD, SEM and TEM. The CuNiCoZnAlTi high entropy alloy is mainly composed of BCC solid solution with crystallite size less than 10 nm in as milled condition. The alloy is thermally stable at elevated temperature about 800 degrees C as it retained its nanostructure. This alloy powder was consolidated using vacuum hot press at 800 degrees C with 30 MPa pressure to a density of 99.95%. The hardness and compressive strength of the high entropy alloy are found to be 7.55 and 2.36GPa, respectively. Superior strength of high entropy alloy is attributed to solid solution strengthening and its nanocrystalline nature. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1027 / 1030

页数：4

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