[modeleng] Re: Spalling?

-----Original Message-----
>When we were still using cast iron wheels at the GM&O, we frequently 
>condemned freight car wheels because of "spalling".  This was a flaking away 
>of the hardened tyre* tread due to metal fatigue,

Jesse,
That's essentially the same process and result, by various causes material at 
the surface is seperated from the substrate.
Harry

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