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Title: The Influence of the Velocity of a Peening Medium on the Almen Intensities and Residual Stress States of Shot Peened Specimen
Author: Zinn, Schulz, Kopp, Scholtes
Source: Conf Proc: ICSP-8 Sept. 16-20, 2002 Garmisch-Partenkirchen, Germany
Publication year 2002
Document number: 2002022
Number of pages: 6
Abstract:
Authors
Wolfgang Zinn*, Jorgen Schulz**, Reiner Kopp**, Berthold Scholtes*
*Institute of Materials Technology, University of Kassel, Kassel, Germany
**Institute of Metal Forming, Aachen University of Technology, Aachen, Germany
Introduction
Up to now, the properties of shot peened components and the reproducibility of the peening process have been assessed by the aid of the Almen test. The bending height of the
Almen strip is a measure of the peening intensity, taking all peening parameters into account in an integral way. The Almen test, however, can only be applied offline and it
is not unambiguously correlated with the resulting properties like, e.g. residual stress. Therefore, a system for direct measurement of peening medium velocity was used to
determine the correlation between peening parameters including the mean shot velocity and the Almen intensity. For that purpose, specimens, made of the German steel grade
42CrMo4 were shot peened under different conditions and velocity distributions as well as resulting residual stress distributions were analyzed.
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