Observations of Shot Peening Residual Stresses in 17 Cr - 7 Ni Austenitic Stainless Steel and Their Redistribution Via Mechan

Author:  J.T. Cammett, C.A Sauer and T.E. Arnold
Source:  Conf Proc: ICSP-5, (p.282-289)
Doc ID:  1993080
Year of Publication:  1993
Abstract:  
Residual stress depth profiles obtained from a 3/4 hard 17 Cr - 7 Ni austenitic stainless steel shot peened at 0.018 A (mm) and 0.020 N (mm) intensities exhibited similar compressive surface residual stress levels; however, the depth of compression was much greater for the higher intensity peening. After static loading in tension to about the 0.02 % offset yield stress level, surface residual compressive stresses were the same as for the as-peened condition; however, subsurface compressive stresses for both peening intensities reduced in magnitude for a given depth. After static and cyclic bending to surface strain levels in tension and in compression, equivalent to the 0.02 percent yield stress level, surface residual compressive stresses remained about the same as for the as-peened condition; however, subsurface residual compressive stresses were greatly reduced in magnitude and were the same at a given depth irrespective of peening intensity.