University of Illinois Urbana-Champaign

Influence of surface finish on fatigue properties

Hanley, B.C.; Dolan, Thomas J.

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https://hdl.handle.net/2142/111884

Description

Title
Influence of surface finish on fatigue properties
Author(s)
  • Hanley, B.C.
  • Dolan, Thomas J.
Issue Date
1950-09
Keyword(s)
  • Surface Finish
  • Fatigue Properties
Abstract
This report covers a brief review of the data available on the extent to which the type and quality of surface finish affects the fatigue strength of metal members. Polished steel specimens exhibit a higher endurance limit than those with a somewhat rougher surface (turned, ground, or filed). However, it is necessary also to consider the physical changes in the surface layers induced by processing as well as the geometrical nature (relative roughness) of the surface finish. The physical characteristics of surface layers whose properties differ from those of the underlying material (as in plated, clad or decarburized layers) may be of greater importance in controlling the endurance limit than the mechanical properties of the base metal. Surface treatments such as flame or induction hardening, shot peening, or cold rolling, as well as chemical surface treatments (nitriding or case carburizing) have pronounced effects on the fatigue strength; after treatments of these types the relative roughness of the surface is of lesser importance. For many of these special processing operations the accompanying residual stresses probably exert a greater influence on the fatigue strength than the surface roughness.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 19
  • 1967-0317
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/111884
Sponsor(s)/Grant Number(s)
Office of Naval Research, U. S. Navy, Contract N6-ori-71, Task Order IV; Project NR-031-005
Copyright and License Information
Copyright 1950 Board of Trustees of the University of Illinois

Owning Collections

Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.