SYMPOSIA PAPER Published: 01 January 1985
STP36247S

Biaxial Low-Cycle Fatigue of Cr-Mo-V Steel at 538°C By Use of Triaxiality Factors

Source

Low-cycle strain-controlled hold-time fatigue tests were performed on 1Cr-1Mo-¼V rotor steel at 538°C under uniaxial and plane-strain biaxial states of stress. Plain strain was produced by use of a blunt notched compact tension specimen. An inelastic finite-element analysis was used to relate strain at the base of the notch to the notch opening displacement. The results showed reasonable correlation by use of von Mises effective elastic and plastic strain components, with the latter modified by a function of the triaxiality factor. Published results for Cr-Mo-V steel at room temperature and elevated temperature for various biaxial stress conditions were examined in terms of the triaxiality factor-effective strain approach. Good correlation was obtained between predicted and measured life.

Author Information

Marloff, RH
Westinghouse R&D Center, Pittsburgh, PA
Johnson, RL
Westinghouse R&D Center, Pittsburgh, PA
Wilson, WK
Westinghouse R&D Center, Pittsburgh, PA
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Details
Developed by Committee: E08
Pages: 637–650
DOI: 10.1520/STP36247S
ISBN-EB: 978-0-8031-4921-2
ISBN-13: 978-0-8031-0444-0