Effects of Grain Boundary Morphologies on Stress Corrosion Cracking of Alloy 600

Abstract

Effects of grain boundary morphologies on stress corrosion cracking (SCC) of Alloy 600 have been studied in 40% NaOH at 315°C using C-ring specimens. The configuration of the grain boundary and the intergranular carbide density were controlled by heat treatment. SCC tests were performed at +150 mV above the corrosion potential. The specimen with a serrated grain boundary showed higher SCC resistance than that with a straight grain boundary. This appears to be caused by the fact that the specimen with the serrated grain boundary has longer SCC path. SCC resistance also increased with intergranular carbide density probably due to enhanced relaxation of stress at intergranular carbide.

Archives of Metallurgy and Materials

“…The transmittance of ~3-nm-thick gdo x films grown on glass substrate was measured by uV-Vis spectrometer. optical band gap energy can be calculated by absorption coefficient α following Tauc method [12]. The optical band gap energy can be estimated the intercept of x-axis with the linear-fitted line as shown in fig.…”