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Title: The Significance of Almen Intensity for the Generation of Shot Peening Residual Stresses
Author: Herzog, Zinn, Scholtes, Wholfahrt
Source: Conf Proc: ICSP-6, (p.270-281)
Publication year 1996
Document number: 1996074
Number of pages: 12
Abstract:
Basic peening parameters of shot peening processes are mean shot velocity, mass flow an dpeening time as well as material, geometry, demension and hardness of the shots and
the parts to be treated respectively. Nevertheless, in practice besides specifications of type and harndess of the material and the shot peening medium resp., peening
operations are pragmatically characterized by Almen intensity and coverage. Whereas reproducibility of shot peening processes can be obtaned in this way, it is not
unambiguous with respect to the resulting shot peening residual stress distributions. In this paper, this aspect is investigated using quenched and tempered shot peened
steel of the German grade X35CrMo17 and aluminium base alloy AI 7020 as examples. Characteristic residual stress depth profiles are shown, realized using a variation of
Almen intensities and shot diameters. The resulting residual stress distributions are discussed taking into accunt the amounts of compressive residual stresses as well as
thicknesses of affected surface layers.
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