Electronics Incorporated - The Shot Peener - Shot Peening Library
Title: Shot Peening
Author: Niku-Lari, A.
Source: Conf Proc: ICSP-1, (p. 1-21)
Publication year 1981
Document number: 1981061
Number of pages: 21
Abstract:
Controlled shot peening is an operation which is used largely in the manufacture of mechanical parts. It should not be confused with sand blasting used in cleaning or
descaling parts. Shot peening is in fact a true machining operation which helps increase fatigue and stress corrosion resistance by creating beneficial residual surface
stresses. The technique consists of propelling, at high speed, small beads of steel, cast iron, glass or cut wire against the part to be treated. The size of the beads can
vary from 0.1 to 1.3 or even 2 mm. The shot is blasted under conditions which must be totally controlled. The main advantage of this particular surface treatment is that
it increases considerably the fatigue life of mechanical parts subjected to dynamic stresses. It has many uses in industry, particularly in the manufacture of parts as
different as helical springs, rockers, welds, joints, aircraft parts, transmission shafts, torsion bars, etc. At a time when the optimum characteristics are being demanded
of mechanical assemblies, shot peening is a surface treatment method which is being increasingly chosen by engineers. However, shot-peening technology is not yet fully
perfected and the substantial changes produced in the treated material make it difficult at the present time to put the best conditions into practical use.
Descriptors: Shot peening; Fatigue life; Residual stress; Stress relieving; Prestessing
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This page last revised: 04/24/2008