Stress relaxation behavior of heat treated Inconel 718

被引：7

作者：

Bapokutty, O. ^{[1
]}

Sajuri, Z. ^{[1
]}

Syarif, J. ^{[1
]}

机构：

[1] Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor

来源：

Journal of Applied Sciences | 2012年 / 12卷 / 09期

关键词：

Creep; Heat treatment; Inconel; 718; Microstructure; Stress relaxation;

D O I：

10.3923/jas.2012.870.875

中图分类号：

学科分类号：

摘要：

The stress relaxation of heat treated nickel-based superalloy, Inconel 718 at 1% strain and high temperature was investigated. Solution treatment was applied on the as-received material at 980°C for 1 h before water quenched followed by double aging treatments at 720 and 621°C for 8 h, respectively and then cooled in air. There are basically, two stages involved in stress relaxation namely transformation-controlled at the beginning of test and creep-controlled at later stage. Different temperatures show that two stages are present. This study has found that recovery process at grain boundary decreased Vickers micro-hardness and dislocation density due to prolonged relaxation time and further decreasing by increasing temperature. © 2012 Asian Network for Scientific Information.

引用

页码：870 / 875

页数：5

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