Fatigue Crack-Growth Rates of Nickel-Based GH4742 Superalloy

被引：2
|
作者：
Liu, H. G. [1 ]
Long, W. [1 ]
Li, Y. Y. [1 ]
机构：
[1] Sichuan Univ, Sch Mfg Sci & Engn, Chengdu, Sichuan, Peoples R China
来源：
MATERIALS SCIENCE | 2019年 / 54卷 / 05期
基金：
中国国家自然科学基金;
关键词：
GH4742 nickel-based superalloy; fatigue crack-growth resistance; load ratio; PROPAGATION;
D O I：
10.1007/s11003-019-00233-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the fatigue crack-growth behavior in the near-threshold region, middle section of the diagram, and high-amplitude region depending on the rates for the nickel-based GH4742 superalloy in tension with various stress ratios. The curves of fatigue crack growth rates are presented (from 10(-7) to 10(-2) mm/cycle). By using the presented dependences, we determine the characteristics of fatigue crack-growth resistance of GH4742 alloy and reveal a significant decrease in the value of the critical stress intensity factor as the stress ratios increase.
引用
收藏
页码：685 / 689
页数：5
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