Method and apparatus for providing a layer of compressive...

Details Method and apparatus for providing a layer of compressive... Method and apparatus for providing a layer of compressive...

2007-01-09

2007-01-09

Jones, David B. (Department: 3725)

Metal deforming

By shot-blasting

C029S090700, C451S039000

Reexamination Certificate

active

10944545

ABSTRACT:
The shot peening method and apparatus (FIG.13) of the present invention utilizes control of the shot peening coverage to provide higher surface compression and comparable depth of compression to conventional 100% coverage peening but with reduced cold working providing improved thermal stability and reduction in shot peening time and cost. A preferred embodiment of this invention employs x-ray diffraction (FIG.13) residual stress and percent cold work determinated by line broadening to establish the optimal degree of coverage for a given material and shot peening intensity.

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patent: 4426867 (1984-01-01), Neal et al.
patent: 5240520 (1993-08-01), Tarui et al.
patent: 5592841 (1997-01-01), Champaigne
patent: 5816088 (1998-10-01), Yamada et al.
patent: 6449998 (2002-09-01), Takeda et al.
patent: 6694789 (2004-02-01), Yamamoto et al.

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