TY - GEN
T1 - Memory effects and steady state growth kinetics for stress corrosion cracking of a cold worked 316L stainless steel in high temperature pure water
AU - Lu, Zhanpeng
AU - Shoji, Tetsuo
AU - Takeda, Yoichi
AU - Ito, Yuzuru
AU - Kai, Akira
AU - Yamazaki, Seiya
PY - 2007/12/1
Y1 - 2007/12/1
N2 - The stress corrosion cracking (SCC) growth kinetics for a cold worked 316L stainless steel was continuously monitored in high purity water at different temperatures and dissolved oxygen (DO) levels under a K (or Kmax) of 30MPa.m0.5. The total SCC test time was more than 8000h to make sure the steady state crack growth rate under each test condition could be reached. Crack growth rate (CGR) increases with increasing temperature in the range 110-288°C A typical intergraular-cracking mode is identified. Depending on the previous test condition, especially the temperature, three kinds of crack growth kinetics, i.e., increasing with testing time then becoming steady, being constant during the whole period, or decreasing with test time then becoming steady, are identified and discussed. Time-dependent and testing history-dependent crack growth modes were confirmed in two series of tests in 2ppm DO and 7.5ppm DO pure water. The apparent activation energies are calculated and compared with other data in different environments under different applied loading levels for understanding the cracking mechanism.
AB - The stress corrosion cracking (SCC) growth kinetics for a cold worked 316L stainless steel was continuously monitored in high purity water at different temperatures and dissolved oxygen (DO) levels under a K (or Kmax) of 30MPa.m0.5. The total SCC test time was more than 8000h to make sure the steady state crack growth rate under each test condition could be reached. Crack growth rate (CGR) increases with increasing temperature in the range 110-288°C A typical intergraular-cracking mode is identified. Depending on the previous test condition, especially the temperature, three kinds of crack growth kinetics, i.e., increasing with testing time then becoming steady, being constant during the whole period, or decreasing with test time then becoming steady, are identified and discussed. Time-dependent and testing history-dependent crack growth modes were confirmed in two series of tests in 2ppm DO and 7.5ppm DO pure water. The apparent activation energies are calculated and compared with other data in different environments under different applied loading levels for understanding the cracking mechanism.
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M3 - Conference contribution
AN - SCOPUS:52349109693
SN - 9781605600598
SN - 9781605600598
T3 - Canadian Nuclear Society - 13th International Conference on Environmental Degradation of Materials in Nuclear Power Systems 2007
SP - 1783
EP - 1798
BT - Proceedings - CIS Workshops 2007, 2007 International Conference on Computational Intelligence and Security Workshops, CISW 2007
T2 - 13th International Conference on Environmental Degradation of Materials in Nuclear Power Systems 2007
Y2 - 19 April 2007 through 23 April 2007
ER -