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Title: Effect Of Shot Blasting On Physical Properties Of Steel
Author: Mattson, R.L. and Almen, J.O.
Source: I,OSRD,No.3274;II,OSRD No.4825;III,OSRD No.6697
Publication year 1945
Document number: 1945000
Number of pages: 45
Abstract:
T
he work of one year on the study of the shot peening process is summarized in this report. The study consisted primarily of the experimental shot peening of actual machine
parts and laboratory specimens, and the testing of these parts and specimens with the cooperation of other laboratories.
T
he effect of shot peening on the following properties was examined: (1) fatigue durability (2) impact (3) dimensions (4) balistic limit of armor plate and (5) stress
corrosion cracking. Data are given in the form of individual case histories.
T
he principal observations were: (1) improvement in fatigue durability in all cases (2) an indication that harder steels than usual might be used for springs if the process
of shot peening is applied (3) resistance to impact unaffected at room temperature but greatly improved at -60 Deg. F. According to limited data (4) dimensional changes
take place (5) a decrease in the ballistic limit of armor plate on the basis of very limited experiments and (6) an improvement in resistance to stress corrosion cracking of
magnesium alloys.
D
iscussions of shot peening apparatus, measuring apparatus, the type of shot used and general shot peening procedure are included. A section is devoted to an experiment
which is in progress on the effect of shot peening on residual stress.
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