downhole drilling

Shot peening - Wikipedia, the free encyclopedia

To answer your specific question, Shotpeening of stainless and high alloy steels reduces galling. Shot peening also improves fatigue strength by putting outer surface in compression. In my opinion, It also helps to minimize corrosion by "homogenizing" the surface finish, eliminating major differences (pits and highspots) that could set up galvanic cells.

In my experience, there are three ways that peening can improve performance: cold work effects, Surface effects, and compressive stress of surface effects.

here are a couple of references for your study:

http://www.shotpeener.com/library/pdf/1990026.pdf

http://www.shotpeener.com/learning/spo.pdf

This company is probably the best resource in this area:

http://www.metalimprovement.com/

Also check out this company that several of my clients have used:

http://www.arrowcryogenics.com/shotblasting.htm

milo