CX-270381: Experimental and Computational Studies of Stress Corrosion Cracking of Alloys 308/309 and 82/182 Weldments in Corrosive and Radiation Environment – University of Illinois at Urbana-Champaign

The University of Illinois proposes a systematic study of Alloy 308/309 and 82/182 weldments exposed to simulated LWR coolant environments during constant extension rate tests (CERTs) and no-load immersion tests. The goal of the proposed experimental program is to correlate crack initiation and IGSCC to 1) GB orientation, 2) local GB chemistry and oxidation, 3) and localized deformation, and 4) displacement cascade damage via proton irradiation. The experimental protocols are designed to separate the effect of irradiation from environmental factors such as LWR water chemistry and applied load and to determine the synergistic effect of irradiation, water chemistry, and tensile stress. Associated modeling activities will expand the Grizzly code for modeling IGSCC and develop a kinetic rate theory code to model RIS in these materials.