It's supposed to, but I gave some doubts. NDI was my specialty when I
was in the Air Force many years ago. I don't recall ever magnafluxing
something that thin. It was usually castings and much heavier pieces.
I don't know if a sub-surface crack in a steel .060 to .100 inches thick
would set up a pole that would attract the material. Or if there would
be any sub-surface irregularity that will show up that would predict
failure.
I solved my doubts with an electric fan.
David Scheidt wrote:
> On Mon, Dec 1, 2008 at 10:25 AM, James F Juhas <james.f.juhas@snet.net> wrote:
>
>> That is exactly what I would do, and indeed, what I was going to do when
>> my MGA fan lost a blade through my left fender well at 6,000 rpm on the
>> Lightening course at NJMP. Notwithstanding the fact that I picked up
>> considerable horsepower after I took the fan off, I doubted the wisdom
>> of making the repair after taking a close look at it. Besides the blade
>> that broke off, another had a partial crack and would have been next to
>> go. And this was in September, after a close inspection of the fan in
>> August revealed no likely defects. The moral is to be wary of
>> 50-year-old steel.
>>
>
> will magnafluxing or the like detect cracks that aren't yet at the surface?
>
>
--
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