Shot Peening Techniques Double Peening - U.S. Patent 3,073,022

Author:  General Motors Corporation
Source:  The Shot Peener magazine, Vol 11/Issue 1, March 1997
Doc ID:  1997043
Year of Publication:  1997
Abstract:  
The following peening treatments were disclosed in U.S. Patent 3,073,022, issued on January 15, 1963 and assigned to the General Motors Corporation. This patent relates to first shot peening in a conventional manner and then applying a second treatment which differs from the first operation.