Analytical TEM Comparisons of Stress-Corrosion-Crack Microstructure in Alloy 600 under Steam-Generator Service and Laboratory Test Conditions

May 31, 2002

Conference Paper

Analytical TEM Comparisons of Stress-Corrosion-Crack Microstructure in Alloy 600 under Steam-Generator Service and Laboratory Test Conditions

Abstract

High-resolution analytical transmission electron microscopy (ATEM) been used to characterize stress-corrosion cracks in Alloy 600 steam-generator tubing from tests with caustic and acid-sulfate solutions. The aim of this work was to identify the microstructural and microchemical signatures of intergranular attack and cracking produced under well-controlled test conditions in order to determine the local environments promoting degradation in service. The examinations are part of an experimental program devoted to a study of IGA/IGSCC in steam generator tube alloys supported by the Framatome Owners Group via its Steam Generator Technical Committee.

Revised: July 2, 2009 | Published: May 31, 2002

Citation

Thomas L.E., S.M. Bruemmer, and P.M. Scott. 2002. Analytical TEM Comparisons of Stress-Corrosion-Crack Microstructure in Alloy 600 under Steam-Generator Service and Laboratory Test Conditions. In Fontevraud 5 International Symposium: Contribution of Materials Investigation to the Resolution of Problems Encountered in Pressurized Water Reactors, 1037-1048. Paris:Societe Francaise d'Energie Nucleaire. PNNL-SA-36554.