Fatigue Crack Propagation and Fracture Toughness of 5Ni and 9Ni Steels at Cryogenic Temperatures

R. Bucci; B. Greene; P. Paris

doi:10.1520/STP49642S

SYMPOSIA PAPER Published: 01 January 1973

STP49642S

Fatigue Crack Propagation and Fracture Toughness of 5Ni and 9Ni Steels at Cryogenic Temperatures

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Fracture mechanics techniques were used to investigate low temperature fatigue crack propagation properties of 5Ni and 9Ni steels. The 5Ni alloy was also tested in the welded condition. Fatigue loading was primarily zero tension, but some data were taken for fully reversed, compression-tension loading in the unwelded materials. Conventional log-log plots of range in stress intensity parameter, ΔK, versus cyclic growth rate, Δa/ΔN, were used to assess material fatigue crack propagation behavior at −320°F, −260°F, and room temperature (70°F). Fracture toughness measurements were also obtained at −260 and −320°F for both steels and for the heat affected zone (HAZ) of the welded 5Ni steel.

Author Information

Bucci, R., J.

Del Research Corp., Hellertown, Pa.

Greene, B., N.

Esso Research and Engineering Company, Florham Park, N. J.

Paris, P., C.

Del Research Corp., Hellertown, Pa.

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Details

Developed by Committee: E08

Pages: 206–228

DOI: 10.1520/STP49642S

ISBN-EB: 978-0-8031-8151-9

ISBN-13: 978-0-8031-6660-8

Fatigue Crack Propagation and Fracture Toughness of 5Ni and 9Ni Steels at Cryogenic Temperatures

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