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09412 Effect of Derofmation and Orientation on SCC of Alloy 690

Picture for 09412 Effect of Derofmation and Orientation on SCC of Alloy 690
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Product Number: 51300-09412-SG
ISBN: 09412 2009 CP
Author: Martin Morra, John Wilson, Peter L. Andresen, John Hickling and Kawait Ahluwalia
Publication Date: 2009
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Alloy 690, of various microstructures and types of cold work, was tested in representative pressurized water reactor primary water at 340 and 360 °C. Intergranular cracking was observed on Alloy 690 at constant stress intensity factor (no cycling) and with “gentle” cyclic loading. Crack growth rates in some cases were in the range of 1 to 10 x 10–9 mm/s, but growth rates as high as 7 x 10–7 mm/s were observed in Alloy 690 with microstructural banding and 1-dimension cold rolling that was tested in the S-L orientation.

Keywords: Stress corrosion cracking, Alloy 690, cold work, microstructural inhomogeneity, banding, PWR, PWSCC, high temperature water
Alloy 690, of various microstructures and types of cold work, was tested in representative pressurized water reactor primary water at 340 and 360 °C. Intergranular cracking was observed on Alloy 690 at constant stress intensity factor (no cycling) and with “gentle” cyclic loading. Crack growth rates in some cases were in the range of 1 to 10 x 10–9 mm/s, but growth rates as high as 7 x 10–7 mm/s were observed in Alloy 690 with microstructural banding and 1-dimension cold rolling that was tested in the S-L orientation.

Keywords: Stress corrosion cracking, Alloy 690, cold work, microstructural inhomogeneity, banding, PWR, PWSCC, high temperature water
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