Correct me if I'm wrong, but based on your plating tolerances, it seems like size variation due to shot peening might be a non-issue. If you're plating the surface after shot peening, you'll be outside of your final tolerance range and would need to do some finish machining or polishing either...
I've been doing some research on grain sizes, grain boundaries, and crack propagation in metals. Every article I've read confirms what I've always known at a high level, that grain flow has an impact on fatigue strength... But I'm not sure how grain flow direction (specifically in a forged...
