University of Reading, Reading,
University of Portsmouth, Portsmouth,
(Received 5 September 1998; accepted 5 May 1999)
The transition point of fatigue crack growth (FCG) between the near-ΔKth and the Paris regions is an important value to study fatigue behavior. This study introduces a curve-fitting technique to identify this point for nickel-based superalloy U720 with stress ratio of R = 0.1 at room temperature. The value of ΔKth under these conditions is also determined.
Paper ID: JTE12229J