Topic
Paris' law
About: Paris' law is a research topic. Over the lifetime, 13815 publications have been published within this topic receiving 224818 citations. The topic is also known as: Paris-Erdogan law.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this article, a study was done to determine the fatigue crack growth behavior of a PWA 1484 single-crystal nickel-base superalloy in a temperature range of 427 C to 871 C. The failure mode transitions were explained by invoking arguments based on environmental damage mechanisms.
Abstract: A study was done to determine the fatigue crack growth behavior of a PWA 1484 single-crystal nickel-base superalloy in a temperature range of 427 C to 871 C. Two distinctive failure modes were observed, which were a function of both temperature and frequency. At lower temperatures and higher frequencies crack growth occurred on the {l_brace}111{r_brace} octahedral slip planes at an oblique angle to the loading direction. Higher temperatures and decrease in frequencies favored a Mode I type failure process. The failure mode transitions were explained by invoking arguments based on environmental damage mechanisms. The fatigue crack growth rate data were analyzed using three different crack driving force parameters. The parameters investigated consisted of the Mode I stress intensity parameter corrected for the inclined crack trajectory, and two different octahedral Mode II parameters, which are based on the calculation of resolved shear stresses on the {l_brace}111{r_brace} slip systems. The Mode I {Delta}K parameter did a fair job in correlating the data but did not collapse it into a single narrow band. The two octahedral crack driving force parameters, {Delta}K{sub RSS} and a newly proposed {Delta}K{sub OCT}, collapsed all the data into a single narrow band. In addition to correlating the fatiguemore » crack growth rates, the two octahedral parameters also predicted the {l_brace}111{r_brace} planes on which the crack growth took place.« less
75 citations
••
TL;DR: In this article, the authors identify the grain size effect on the small fatigue crack initiation and growth mechanisms of nickel-based superalloy GH4169 and show that there was a transition of fatigue cracks initiation mechanism between fine-grained material and coarse grained material.
75 citations
••
TL;DR: In this article, the authors proposed a phenomenological fatigue crack propagation model for API-5L X100 pipeline steel exposed to high-pressure gaseous hydrogen, which is based upon the hypothesis that one of two mechanisms dominate the fatigue crack growth (FCG) response depending upon the crack extension per cycle ( da / dN ) and the material hydrogen concentration.
75 citations
••
TL;DR: In this article, a linkage system was developed in order to permit the variation of the K I / K II ratio by changing the loading angle, and a finite element analysis was also done to obtain the k I and K II values for the different loading angles.
75 citations
••
TL;DR: Very long life fatigue and near-threshold fatigue crack growth behavior of 7075 and 6061 Al-alloys in T6 condition were investigated using accelerated fatigue testing at 19.5 kHz on a piezoelectric machine as mentioned in this paper.
75 citations