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TECHNICAL PAPERS

Characterization of a Water Peening Process

[+] Author and Article Information
S. R. Daniewicz

Department of Mechanical Engineering, Mississippi State University, P.O. Drawer ME, Mississippi State, MS 39762-5925

S. D. Cummings

Lockheed Martin Tactical Aircraft Systems, Fort Worth, TX

J. Eng. Mater. Technol 121(3), 336-340 (Jul 01, 1999) (5 pages) doi:10.1115/1.2812383 History: Received November 21, 1997; Revised November 30, 1998; Online November 27, 2007

Abstract

A traversing water jet was used to impact the surface of 1100 series aluminum specimens in an effort to generate compressive residual stresses on the surface. Stresses induced by the water peening operation were measured using X-ray diffraction, and compressive stress increases as large as 60 percent of the monotonic yield strength resulted. Surface roughness and hardness were also measured. Finite element modeling of a stationary water jet impinging on an elastic-plastic half-space was performed to characterize the water peening process. Surface residual stresses were found to be a result of sub-surface plastic deformations.

Copyright © 1999 by The American Society of Mechanical Engineers
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