Characterization of Particle Size and Shape Distributions for Shot Peening Media
Author: Purdue University, School of Materials Engineering | https://engineering.purdue.edu/MSE
Source: The Shot Peener magazine, Vol 38, Issue 2, Spring 2024
Doc ID: 2024011
Year of Publication: 2024
Abstract:
ABSTRACT
Characterizing and controlling particle size and shape distributions
of shot media are fundamental to ensuring the success
of the peening process. A combination of material knowledge,
process expertise, and quality control measures are required to
achieve consistent and reliable results. Technical advances in
dynamic imaging of particulate matter have enabled routine
sampling and analysis of particle size and shape distributions.
This article discusses progress toward developing industryready
specifications for media size and shape distributions.
1. INTRODUCTION
The relationship between the size distribution of steel shot and
the residual stress field generated by shot peening is a critical
aspect of the process. The residual stress field contributes to
mechanical properties and performance of treated parts such
as springs, axles, and gears. Size and shape distributions of shot
media directly affect the impact energy and contact stress in
the peening process. This paper discusses measurement and
specification of size and shape characteristics as they apply
to as-manufactured and in-use media. Further opportunities
include the use of size and shape descriptors in model-based
process control and optimization.
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