Microstructure and creep properties of a single crystal nickel-based superalloy containing Re

被引：0

作者：

Tian, Sugui ^{[1
]}

Liang, Fushun ^{[1
]}

Li, Anan ^{[1
]}

Li, Jingjing ^{[1
]}

Wang, Xiaoliang ^{[1
]}

Zhang, Te ^{[1
]}

机构：

[1] Shenyang University of Technology, Shenyang 110870, China

来源：

Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2012年 / 41卷 / 06期

关键词：

Metallic matrix composites - Activation energy - Nickel - Single crystals - Creep - Nickel alloys - Creep resistance - Crystal microstructure - Strain rate;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

By means of measurement of creep properties and microstructure observation, the creep behaviors of a single crystal nickel-based superalloy containing 4.2%Re were investigated. Results show that after fully heat treated, the microstructure of the alloy consists of the cubical γ' phase embedded in the γ matrix as coherent form. In the range of the applied stresses and test temperatures, compared to the free-Re superalloy, the superalloy with 4.2% Re possesses a better creep resistance and longer creep lifetime, and the creep activation energy and stress exponent of the alloy during steady state creep have been calculated. By means of analyzing the dislocation climbing over the rafted γ' phase and the factors effecting on strain rates of the alloy, the deformation mechanism of the alloy during steady state creep was investigated. Thereinto, dissolving of Re into the alloy matrix may hinder the dislocations movement and reduce the strain rate of the alloy, which is thought to be the main reason for the alloy possessing lower strain rate and longer creep lifetime. Copyright © 2012, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.

引用

页码：1016 / 1020