1982-02-01

Advanced Concepts of the Process 821455

New methods of measuring and controlling coverage and, in special situations, intensities, have been developed and are gaining recognition by concerned users of shot peening. For coverage control a fluorescent material accurately reflects degree of coverage attained. Techniques for the peening of very small holes to achieve a uniform beneficial compressive stress is shown as well as a method of measuring intensity in holes too small to be checked by conventional Alman strips.
Shot Peen Precondition of Autofrettage for improved fatigue life are combined to show significantly increased fatigue life in parts treated solely by either of these two processes alone.

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