7075-T6 S-N Curves
7075-T6 S-N Curves
(OP)
Hey all,
I'm looking for S-N curves for AL 7075-T6.
I've looked at MIL-HDBK-5 and unfortunately the Kt value does not go high enough for me (the highest is 5.0 and i'm in the region of 8.0).
Naturally i'd prefer any electronic resources but then again anything would be better than nothing at all.
Cheers
I'm looking for S-N curves for AL 7075-T6.
I've looked at MIL-HDBK-5 and unfortunately the Kt value does not go high enough for me (the highest is 5.0 and i'm in the region of 8.0).
Naturally i'd prefer any electronic resources but then again anything would be better than nothing at all.
Cheers





RE: 7075-T6 S-N Curves
RE: 7075-T6 S-N Curves
Did you see that the originator of this question already referenced MIL-HDBK-5? Even the latest "J" revision that you indicated still does not have any data for Kt > 5.
themaniac,
I doubt that any other references will have data for Kt > 5, but the ones to check would be the following:
Aerospace Structural Metals Handbook (ASMH), 1999 ed.
Structural Alloys Handbook, 1996 ed.
Damage Tolerant Design Handbook
https://engineering.purdue.edu/IIES/CINDAS/Pubs_html
Perhaps you can just extrapolate from the available MIL-HDBK-5 curves would the decrement in fatigue strength would be for Kt ~ 8. Best of luck.
RE: 7075-T6 S-N Curves
Doug
RE: 7075-T6 S-N Curves
In the ASM Handbook, Volume 19 "Fatigue and Fracture", you can find a S-N field for Al 7075-T6 whit very sharp notch Kt>12 (chapter "Selecting Aluminium Alloys to Resist Failure by Fracture Mechanics", p.786 '96 Ed.) is a small graph, but is the only reference i know.