Evaluation of SCC Resistance of Alloy 600 in High Temperature Pressurized Water Environments by the High Stress Ratio Cyclic Crack Growth Tests

Nagano, Hiroo; Tokimasa, Katsuyuki; Tanaka, Kenichi; Tsuge, H.

doi:10.2355/tetsutohagane1955.74.3_527

Cited by 2 publications

(2 citation statements)

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“…The existing database [8][9][10][11]19,20,[30][31][32][33][34][35][36] consists of results of ≈800 tests on several heats of Alloy 600 under various heat treatment conditions. The tests were conducted in high-purity water at temperatures between 240 and 325°C; ≈600 tests have been conducted at 289°C.…”

Section: Alloy 600mentioning

confidence: 99%

“…The fatigue CGR (da/dN) database on Alloy 600 is composed of results from 465 tests in air [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] at temperatures up to 538°C. The number of tests at various temperatures are as follows: 166 at room temperature, 13 at 35°C, 9 at 130°C, 14 at 289°C, 26 at 316°C, 20 at 320°C, 11 at 380°C, 76 at 427°C, and 130 at 538°C.…”

Section: Alloy 600mentioning

confidence: 99%

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Effects of alloy chemistry, cold work, and water chemistry on corrosion fatigue and stress corrosion cracking of nickel alloys and welds.

Chopra¹,

Soppet²,

Shack³

2001

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Reactor vessel internal components made of nickel-base alloys are susceptible to environmentally assisted cracking (EAC). A better understanding of the causes and mechanisms of this cracking may permit less conservative estimates of damage accumulation and requirements on inspection intervals. The objective of this work is to evaluate and compare the resistance of Alloys 600 and 690 and their welds, such as Alloys 82, 182, 52, and 152, to EAC in simulated light water reactor environments. The existing crack growth rate (CGR) data for these alloys under cyclic and constant loads have been evaluated to establish the effects of alloy chemistry, cold work, and water chemistry. The experimental fatigue CGRs are compared with CGRs that would be expected in air under the same mechanical loading conditions to obtain a qualitative understanding of the degree and range of conditions for significant environmental enhancement in growth rates. The existing stress corrosion cracking (SCC) data on Alloys 600 and 690 and Alloy 82, 182, and 52 welds have been compiled and analyzed to determine the influence of key parameters on growth rates in simulated PWR and BWR environments. The SCC data for these alloys have been evaluated with correlations developed by Scott and by Ford and Andresen.

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