John,
Be careful with the hardness of the blasting media - the old adage is that shot
peening reduces stress risers in a material, and sand blasting adds them. The
shot peening "fills in" micro-ridges and works the material, whereas blasting
removes material and leaves pits and lands that can lead to local stress
concentrations.
John.Deikis@med.va.gov wrote: Last night I polished and balanced my rods. In
the absence of an accessible
shop that offers shot peening, I was guided to a glass beading cabinet and
told to bead the hell out of them and it would be almost the same. After a
while of doing this, I started to run out of teen age girls to think about
and my thoughts wandered to the theme of metullurgy. My breathing slowed to
normal and I muttered to myself: "Is it illegal to peen in public?" "How
many shots can I peen in a row and still drive myself home? And then I cam
to "How does peening strengthen a rod?"
That's when I thought of you guys! And I am looking for a serious answer
here, despite my introductory free association. ;-)
--JohnD
Ron Soave
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