Shot peening engine block question

[Niblet]

Originally Posted by marxjunk

shot peening and shot blasting are 2 diff procedures..

shot peening changes the surface and adds strength and promotes stress relieving..they shot peen Z28 rods for strength and stress relief..makes the rods perform better..you can actually see what shot peening does on a pink rod..its dramatic

shot blasting removes debris and surface scale....it doesnt change it deeply on a molecular level like shot peen..

shot peen gets a a specific media and air pressure changes the characteristics of how the "grain" aligns in the structure..its actually calibrated, by shooting beads at a metal gauge, and the distortion is measured and that determines what it does..it really changes the surface look and texture....the ole.."lemme roll it around in the shot peen thing" does not work as intended..theres science to it..metallurgy

Yes there's specific media and pressure, but it is NOT rocket science, its just hitting the surface with shot and making sure you get 100% coverage,, nothing really scientific at all,, we shot peen transport catagory aircraft parts all the time,,,its just selecting the right size shot and hitting it with the flapper wheel at a certain speed and verifying you get coverage
lets not overthink this,,thats what engineers do