In-situ observation of intergranular stress corrosion cracking in AA2024-T3 under constant load conditions

Effects of irradiation on intergranular stress corrosion cracking

Intergranular stress corrosion cracking &YSCC) is a pervasive and generic problem in current light water reactor and advanced reactor designs that can lead to widespread component failure. IASCC is believed to be due to either to changes in the grain boundary composition, the microstructure or the water chemistry and corrosion potential. Of greatest interest are the changes in composition and m...

Longitudinal Residual Stress Analysis in AA2024-T3 Friction Stir Welding

Friction Stir Welding (FSW) is an innovative solid-state joining process, which is gaining a great deal of attention in several applicative sectors. The opportune definition of process parameters, i.e. minimizing residual stresses, is crucial to improve joint reliability in terms of static and dynamic performance. Longitudinal residual stresses, induced by FSW in AA2024-T3 butt joints, have bee...

Microstructural and microchemical mechanisms controlling intergranular stress corrosion cracking in light-water-reactor systems

This review paper examines mechanisms controlling IGSCC in selected LWR components. Emphasis is placed on identifying material microstructures and microchemistries which promote susceptibility to premature failure. Two important examples are evaluated in some detail: stainless steel pipe cracking and primary-side SCC of alloy 600 steam generator tubing. In each case, grain boundary segregation ...

Stress Corrosion Cracking

Determination of the Microstructure Parameters Which Control Intergranular Stress Corrosion Cracking

This paper outlines an approach for investigating the aspects of mechanical deformation which are relevant to intergranular stress corrosion cracking. Mechanical testing, electron backscatter diffraction (EBSD), and optical microscopy are used to investigate the difference in mechanical behavior between solutionized, lightly sensitized (1 hour at 600 C), and heavily sensitized (50 hours at 600 ...