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 Univ Technol, Coll Mat Sci & Engn, Shenyang 110870, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2012年 / 41卷 / 06期

关键词：

single crystal nickel-based superalloy; element Re; microstructure evolution; creep property; deformation mechanism;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

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 gamma' phase embedded in the gamma 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 gamma' 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.

引用

页码：1016 / 1020

页数：5

共 15 条

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