Abstract
Constant amplitude and spectrum loading fatigue crack growth rate tests were performed on HP-9Ni-4Co-30C steel heat treated to three strength levels. It was concluded that the constant amplitude crack growth rate is dependent on the strength level of the material and independent of the toughness of the material. It is also shown that the fatigue crack growth retardation is greater for a material with low strength and high toughness. These findings are discussed in light of the Elber closure model and it is shown that the model predicts that both the constant amplitude fatigue crack growth data and the retardation data are controlled by the yield strength.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
