Inconel 718 - crack prop data

the first hit from a google for "718 crack growth" gives exactly what you need.

another day in paradise, or is paradise one day closer ?

nzhills1,

Look at this document:
WL-TR-94-4053 Volume 2
Damage Tolerant Design Handbook
Section 5.9

There are a lot of da/dN vs. ΔK plots in there. If you know the geometry (beta) and have a stress you want to investigate, you can use this data to model crack growth.

Although beware that DOT/FAA/AR-05/15 "Fatigue Crack Growth Database for Damage Tolerance Analysis" states this is a "material identified in survey lacking adequate data for inclusion in the database"

Keep em' Flying
//Fight Corrosion!