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RESEARCH PAPERS

Experimental Study on Crack Growth Behavior for Austenitic Stainless Steel in High Temperature Pure Water

[+] Author and Article Information
M. Hishida

Research and Development Center, Toshiba Corp., Saiwaiku, Kawasaki, Japan

M. Saito

Nuclear Energy Group, Toshiba Corp., Japan

K. Hasegawa, K. Enomoto

Mechanical Engineering Research Laboratory, Hitachi, Ltd., Japan

Y. Matsuo

Nuclear Power Research and Development Institute, The Tokyo Electric Power Co., Inc., Japan

J. Pressure Vessel Technol 108(2), 226-233 (May 01, 1986) (8 pages) doi:10.1115/1.3264773 History: Received January 27, 1984; Revised April 17, 1985; Online November 05, 2009

Abstract

Crack growth behavior of Type 304 stainless steel in a simulated BWR water environment was investigated for the quantitative characterization of subcritical flaw growth in BWR piping systems. Crack propagation rates under corrosion fatigue and stress corrosion cracking were generated using compact specimens. The effects of several parameters on the rates were discussed. Furthermore, surface crack growth behavior was examined under different modes of cyclic loading, and results were discussed in comparison with compact specimen data. The corrosion fatigue crack propagation rates strongly depended on the frequency and the stress ratio. The rates became higher as the frequency lowered and the stress ratio increased. No effect from dissolved oxygen concentration and heat treatment of the steel was observed in tests, where transgranular cracking mainly took place. Stress corrosion cracking rate data indicated K ISCC was above 15 MPa•m1/2 . On the other hand, surface crack growth behavior included scattered crack propagation rates. However, the relationship between da /dN and ΔK was basically similar to that obtained in the compact specimens, except under given test conditions, where the acceleration for the crack growth rate at a crack tip on the panel surface was different from that at the deepest point.

Copyright © 1986 by ASME
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