Residual Stress Measurement for Quality Control of Shot Peening

Author:  Lambda Research
Source:  The Shot Peener magazine, Vol 10 / Issue 4, Winter 1996
Doc ID:  1996177
Year of Publication:  1996
Abstract:  
The magnitude and depth of the layer of compressive residual stress produced by shot peening is critical to achieving increased component fatigue strength. Although the Almen strip provides a practical means of monitoring the intensity of shot peening, the Almen strip arc height depends upon the area under the stress-depth plot and is not sufficient to guarantee both the magnitude and depth of the residual stress distribution produced. The subsurface stress distribution must be measured for reliable quality control of shot peening.