Fatigue Crack-Growth Rates of Nickel-Based GH4742 Superalloy

被引：0
|
作者：
H. G. Liu
W. Long
Y. Y. Li
机构：
[1] Sichuan University,School of Manufacturing Science and Engineering
来源：
Materials Science | 2019年 / 54卷
关键词：
GH4742 nickel-based superalloy; fatigue crack-growth resistance; load ratio;
D O I：
暂无
中图分类号：
学科分类号：
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.
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页码：685 / 689
页数：4
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