Why Intensity Isn’t Dependent on Exposure Time

Author:  Jack Champaigne, Electronics Inc.
Source:  The Shot Peener magazine, Vol 28, Issue 1, Winter 2014
Doc ID:  2014012
Year of Publication:  2014
Abstract:  
I recently received an e-mail from someone thanking us for Dr. Kirk’s Curve Solver program, followed by several interesting questions. The shot peening technician (let’s call him SPT) had a fixture with six Almen holders. He understood how to run the fixture through their machine at four different exposure times, allowing him to construct a saturation curve according to SAE J443. (J443 requires a minimum of four data points on each curve.) He then had six curves, each with intensity value, but at differing T1 times. All of the intensity values were within the tolerance band allowed. SPT wanted to know “if his machine cycle time was set for the longest T1 time, would the intensity be too high for the shortest T1 time?”