Post Shot Peen Material Removal/Surface Disturbance.
Post Shot Peen Material Removal/Surface Disturbance.
(OP)
Anyone have a quick sumation of what possible effects could be expected of the following. Aluminum forging shot peened with 200% coverage damaged appx .006 deep gouge appx 1" long .008" wide. Damaged area blended out 10/1(ish), and shot peen not replaced? Most allowables of surface material are 10% of shot peen intensity. This particular one works out to allow .001" material removal allowable. How severe, if any would the reduction in fatigue life be?
Thanks,
Skypunk
Thanks,
Skypunk





RE: Post Shot Peen Material Removal/Surface Disturbance.
If i read your post correctly, the damaged area went through the induced surface compression layer due to the peening process, and further reduced by the blend. I would probably recommend looking at the local stress raiser casued by a grooved notch (petersons etc) and rund some quick numbers. You could always re-shot pean the local structure though to re-introduce the compressive layer.
RE: Post Shot Peen Material Removal/Surface Disturbance.
RE: Post Shot Peen Material Removal/Surface Disturbance.
We generally never re-anodized a part due to the process involved. Most of the time the part would burn at the electrode contact points during the anodize (not to mention the adverse effects of anodizing to the fatigue properties).