A Method to Determine the Transition Point of Fatigue Crack Growth Rate from Near-Δ<i>K</i><sup>th</sup> to Paris Regions

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Volume 27, Issue 4 (July 1999)

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ISSN: 0090-3973
Page Count: 2

A Method to Determine the Transition Point of Fatigue Crack Growth Rate from Near-ΔK^th to Paris Regions

Zheng, J
University of Reading,

Powell, BE
University of Portsmouth,

(Received 5 September 1998; accepted 5 May 1999)

Abstract

The transition point of fatigue crack growth (FCG) between the near-ΔK^th 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 ΔK^th under these conditions is also determined.

Keywords:
fatigue crack growth, transition point, threshold value, curve-fitting technique, nickel-based superalloy U720

Paper ID: JTE12229J
DOI: 10.1520/JTE12229J
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Author Title A Method to Determine the Transition Point of Fatigue Crack Growth Rate from Near-ΔK^th to Paris Regions Symposium , 0000-00-00 Committee E08