Electronics Incorporated - The Shot Peener - Shot Peening Library
Title: Ductility and Strength Properties of Shot Peened Surfaces
Author: Dr. David Kirk
Source: TSP Vol 20 / Issue 2, Spring 2006
Publication year 2006
Document number: 2006015
Number of pages: 3
Abstract:
INTRODUCTION
It is an apparent paradox that peening, which requires a large
degree of ductility, can readily be applied to high-strength, low ductility,
engineering components. A single indentation may
induce plastic deformations of more than 100%. This is illustrated
in fig.1 where it is assumed that the depth of the deformed zone is
twice that of the indentation itself. A column of length AC has
been compressed to half of its height BC. The deformed column
therefore has an average compressive plastic deformation equivalent
to a tensile deformation of 100% (using engineering strain
calculation). That deformation varies from 0% at C (the boundary
of the plastically-deformed zone) to a maximum at B. Assuming a
simple linear variation, that will equate to 200% at B.
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