Fatigue strength of Inconel 718 at elevated temperatures

被引：2

作者：

Kawagoishi, N ^{[1
]}

Chen, Q

Nisitani, H

机构：

[1] Kagoshima Univ, Fac Engn, Kagoshima 8900065, Japan

[2] Kyushu Sangyo Univ, Fac Engn, Fukuoka 8138503, Japan

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2000年 / 23卷 / 03期

关键词：

high cycle fatigue; Inconel; 718; crack arrest; crack closure; oxidation; elevated temperature;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The strength of Inconel 718 under rotary bending fatigue is investigated at roam temperature, 300, 500 and 600 degrees C in air. It is found that in the long-life region, the fatigue strength of a plain specimen is much higher at elevated temperatures than at room temperature, though the static strength decreases with the increase in temperature. The effect of temperature on the fatigue strength is examined in terms of the initiation and early growth behaviour of a small crack. The results are discussed in relation to the competition between the softening of the nickel matrix (gamma phase) and the surface oxidation at elevated temperatures.

引用

页码：209 / 216

页数：8