Fatigue crack growth rate tests were conducted on HY-100, high tensile steel (HS) and medium carbon ship steels. Tests were conducted in air at 5 Hz and in 3.5 percent NaCl salt water under freely corroding conditions at 0.5 Hz. Load ratios of 0.10, 0.67 and 0.80 were investigated in both environments. For data gathered in air, crack growth rates (da/dN) were insensitive to stress ratio and the data conformed to a Paris power law relationship between da/dN adn stress-intensity range (delta K). Salt water exerted a minor effect on da/dN in the HS and medium carbon steels. However, in the higher strength HY-100, a combination of salt water and high load ratios accelerated crack growth rates by approximately a factor of five.
Load ratio and environmental effects on fatigue crack growth rates for several ship steels
Lastverhaeltnis und Umwelteinfluesse auf die Fortpflanzung von Ermuedungsrissen fuer verschiedene Schiffsbaustaehle
US Government Reports ; Apr ; 1-41
1983
41 Seiten
Report
Englisch
Effect of Stress Ratio on Fatigue Crack Growth Rates in Some Quenched and Tempered Steels
British Library Conference Proceedings | 1993
|A model of corrosion fatigue crack growth in ship and offshore steels
Tema Archiv | 2007
|Corrosion fatigue crack growth behaviour of naval steels
Tema Archiv | 2006
|Near threshold fatigue crack growth in structural steels
Tema Archiv | 1998
|Analysis of Fatigue Crack Growth in Ship Structural Details
Online Contents | 2016
|