On Sat, 22 May 2021 09:01:35 -0400
"Jim Wilkins" wrote:

snip
Would fatigue cracking in oil be similar enough to cracking in air, which
oxidizes freshly exposed steel?

And what about heat? Flexing metal creates heat. If you accelerate
flexing to speed up failure detection you will likely create heat that
would not be present in its actual use...

--
Leon Fisk
Grand Rapids MI