X-Ray Diffraction Determination of Subsurface Residual Stress and Cold Work Distributions Produced by Shot Peening

Author:  Lambda Research, Inc.
Source:  The Shot Peener magazine, Vol 02/No 3, Dec., 1988
Doc ID:  1988098
Year of Publication:  1988
Abstract:  
Cold working of metals produces extensive dislocation networks within individual grains. The dislocation networks define "crystallities" which are nearly perfectly crystalline subgrains. As the percent cold work increases, the average size of the crystallities is reduced and the average (root mean square) microstrain within the crystallities increases. Both the reduced crystallite size and increased microstrain result in broadening of x-ray diffraction peaks.