SYMPOSIA PAPER Published: 01 January 1982
STP30105S

Effect of Surface Residual Stresses on the Fretting Fatigue of a 4130 Steel

Source

Fretting fatigue is defined as the fatigue of a material caused by the presence of a rubbing contact with a relative displacement of less than 100 micrometres. The presence of fretting results in a lowering of the fatigue life of the material. The relative displacement, also known as the slip amplitude, has a considerable effect on the life of the specimens that were investigated. Different surface microstructures were studied in order to investigate the effect of slip amplitude on the fatigue life. These treatments, namely carburization and decarburization, also induced surface residual stresses which were instrumental in causing the changes that were observed in the fatigue life.

Effects of residual stress on fretting fatigue were studied using three kinds of heat-treated specimens of a medium carbon steel. Two sets of experimental specimens were respectively decarburized and carburized to induce residual stresses on the surface. A set of control specimens of tempered martensite was used to compare results. All three structures showed a minimum in life versus the slip amplitude; the carburized specimens exhibited longer lives in general and the opposite was true for the decarburized specimens. In all cases, transverse cracks initiated on the surface, at the interface between the contacting and free surfaces, and propagated inwards, perpendicular to the loading axis. An attempt is made to explain the observed phenomena using residual stress arguments.

Author Information

Kudva, SM
Rensselaer Polytechnic Institute, Troy, N.Y.
Duquette, DJ
Rensselaer Polytechnic Institute, Troy, N.Y.
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E08
Pages: 195–203
DOI: 10.1520/STP30105S
ISBN-EB: 978-0-8031-4841-3
ISBN-13: 978-0-8031-0711-3