The stress corrosion crack growth rate response was evaluated on as-received, cold worked and aged Alloy 22 (UNS N06022) in 110 °C, aerated, concentrated, high pH groundwater environments. Long term crack growth rate data showed that Alloy 22 exhibited stable growth rates under “gentle” cyclic loading, but was prone to crack arrest at fully static loading, unlike observations in prior work on Ti Grade 7. No effect of Pb additions was observed.

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