Long time creep prediction of a creep constitutive equation of Ni-base single crystal superalloys

被引：3

作者：

Izuno, Hitoshi ^{[1
]}

Koizumi, Yutaka ^{[1
]}

Yokokawa, Tadaharu ^{[1
]}

Harada, Hiroshi ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Mat Engn Lab, Tsukuba, Ibaraki 305, Japan

来源：

JOURNAL OF THE JAPAN INSTITUTE OF METALS | 2007年 / 71卷 / 09期

关键词：

nickel-base superalloy; creep curve prediction; creep constitutive equation; long time creep test;

D O I：

10.2320/jinstmet.71.712

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

We have proposed and developed a new creep constitutive equation for Ni-base superalloys. In this paper, an application of the creep constitutive equation for long time creep test is discussed. Several creep curves of the test conditions of 1000 degrees C/137 MPa and 900 degrees C/245 MPa are fitted and achieved a good reproducibility. It is also examined to predict the rupture time of a continuing long time creep test from the behavior of the initial stage creep. The initial part of the creep data is fitted by the creep constitutive equation to extract initial creep stage parameters, and parameters belongs to the later creep stage are got by multi regression analysis.

引用

页码：712 / 715

页数：4

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