The Effect of Several Finishing Processes on the Fatigue Resistance of Hole Surfaces

[+] Author and Article Information
M. O. Lai, A. Y. C. Nee

Department of Mechanical and Production Engineering, National University of Singapore, Singapore

J. Eng. Mater. Technol 111(1), 71-73 (Jan 01, 1989) (3 pages) doi:10.1115/1.3226435 History: Received October 19, 1987; Online September 15, 2009


This investigation examines the effects of different finishing processes on the fatigue life of premachined holes in Assab 760 steel plates. The finishing processes studied were reaming, ballizing, and emery polishing. A general decrease in fatigue life with increase in surface roughness is observed for all the processes employed. In comparing the different processes, for a constant surface roughness, polishing is generally found to give the longest fatigue life while ballizing, in spite of the greater compressive residual stresses induced on the surface of the finished hole, the shortest. The surprising phenomenon was found to be attributed to the amount of plastic deformation occurred before fatigue loading. For Assab 760 steel, a prestrain in the radial direction of less than about 2.5 percent appeared to reduce the fatigue resistance of the material.

Copyright © 1989 by ASME
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