Surface Coverage and Peening Intensity

The workpiece surface being peened is affected by the amount of the target surface peened and the effectiveness of the peening action on that target surface.

Surface coverage is a measure of how completely an area has been hit by the myriad of impinging shot particles. Without 100% coverage or saturation, the improvement in fatigue characteristics conventionally produced by shot peening is not obtained.

As stated in SAE Recommended Practice J443, "Procedure for Using Shot Peening Test Strip," a definite and quantitative relationship between coverage and exposure time exists, which may be expressed as follows:

0 0

Post a comment