La Determination Des Precontraintes De Grenaillage Par Diffractometrie X Et Leur Modelisation

Author:  Castex, L. and Joubert, F.
Source:  Conf Proc: ICSP-1, (p.255-262)
Doc ID:  1981043
Year of Publication:  1981
Abstract:  
The X-ray diffractometry method for measuring stresses is a fast and reliable technique in laboratory and on site. Results obtained for the prestresses in steel shot peening studies on 15CDV4 steel are in good agreement. They show a strong gradient of stresses (strains) on several tenths of a millimeter and a strong gradient of dislocation density on several hundredths of a millimeter. From the results it was possible to obtain a modelization of the strain--stress distribution in the shot-peened material thickness and to determine the superficial stress mechanism induced by shot peening. Descriptors: Chromium molybdenum steels-- Mechanical properties; Shot peening; X ray stress analysis; Mathematical models; Residual stress; Prestressing