SYMPOSIA PAPER Published: 01 January 1984
STP32572S

Wide Range Creep Crack Growth Rate Behavior of A470 Class 8 (Cr-Mo-V) Steel

Source

Wide range steady-state creep crack growth rate behavior of an A470 Class 8 steel was characterized at 538°C (1000°F) using constant load and constant deflection rate methods of testing. Both methods yielded mutually consistent results. Crack growth rates in the range of 10−4 to 10−1 mm/h were successfully correlated with the energy rate line integral, C*. Results are discussed in light of the recent analytical studies that have appeared in the literature for growing cracks in creeping materials. Various methods of determining C* for CT specimens are also discussed.

Author Information

Saxena, A
Steam Turbine-Generator Division, Pittsburgh, Pa.
Shih, TT
Steam Turbine-Generator Division, Pittsburgh, Pa.
Ernst, HA
Steam Turbine-Generator Division, Pittsburgh, Pa.
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Details
Developed by Committee: E08
Pages: 516–531
DOI: 10.1520/STP32572S
ISBN-EB: 978-0-8031-4900-7
ISBN-13: 978-0-8031-0208-8