Thermal-Mechanical Fatigue Crack Propagation in Nickel- and Cobalt-Base Superalloys Under Various Strain-Temperature Cycles
- 1 January 1973
- book chapter
- Published by ASTM International
- p. 166-178
- https://doi.org/10.1520/stp38838s
Abstract
Crack propagation rates under isothermal and thermal fatigue cycling have been determined for a conventionally-cast cobalt-base superalloy, and conventionally-cast and directionally-solidified nickel-base superalloys. Linear elastic fracture mechanics, where the crack growth rates under different strain ranges or for various crack lengths depend only on the strain intensity factor range, was found to be applicable over the range of crack growth rates of most practical importance. A comparison of crack growth rates is made for thermal fatigue under various strain-temperature cycles and isothermal low-cycle fatigue, and the influence of coatings and superimposed creep is discussed.Keywords
This publication has 3 references indexed in Scilit:
- Fatigue-crack propagation behavior of type 304 stainless steel at elevated temperaturesMetallurgical Transactions, 1971
- Fatigue and fracture of cylindrical shells containing a circumferential crackInternational Journal of Fracture, 1970
- Fatigue Crack Propagation in MetalsNature, 1966