SYMPOSIA PAPER Published: 01 January 1992

Improving Fretting Fatigue Strength at Elevated Temperatures by Shot Peening in Steam Turbine Steel


Fretting fatigue tests at elevated temperature were carried out using shot-peened specimens to improve the high temperature fretting fatigue strength of 12Cr-Mo-W-V steam turbine steel. Shot peening improved fretting fatigue strengths by a factor of 1.8 at an elevated temperature (773 K) as well as at room temperature. Residual compressive stresses first drop rapidly by a factor of three and then level off. Residual compressive stresses of 200 MPa were measured after a 30 000 h exposure at 773 K. Shot peening is thus shown to be effective over long periods at 773 K.

Author Information

Mutoh, Y
Nagaoka University of Technology, Nagaoka-shi, Japan
Satoh, T
Nagaoka University of Technology, Nagaoka-shi, Japan
Tsunoda, E
Toshiba Corporation, Yokohama, Japan
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Developed by Committee: E08
Pages: 199–209
DOI: 10.1520/STP25835S
ISBN-EB: 978-0-8031-5214-4
ISBN-13: 978-0-8031-1448-7