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Re: [T3] Polishing?


On 12 Jun 99, at 20:04, Per Lindgren wrote:

> Jim Adney wrote:
> 
> > I doubt if the roughness would help cracking, although shot peening
> > will.
> 
> Can somebody please explain to me, what is shot peening? I cant say I understand
> the term fully.

It's like sand blasting, except that you use hard round non-abrasive 
media instead of sand. It peens the surface and puts it in a state of 
compressive stress. Under these conditions a crack can't get started. 
The crack needs a part to be under tension.

Jim
-
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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