10285 Repassiviation Behavior and Stress Corrosion Cracking Susceptibility of Stainless Steels Containing Silicon

Available for download

Product Number: 51300-10285-SG

ISBN: 10285 2010 CP

Author: Peter H. Chou, Peter L. Andresen, Michael L. Pollick, and Raul B. Rebak

Publication Date: 2010

Member Price: $0.00

Non Member Price: $20.00

Price: $20.00

Qty:

Stress corrosion cracking (SCC) is a pervasive failure mode for austenitic stainless steels core internals components in nuclear light water reactors. Some cases of SCC may be exacerbated by irradiation. Irradiation may change in the dislocation distribution and increase the yield stress (hardness) of the materials. Irradiation may also alter the local chemistry of the austenitic alloys, for example causing chromium depletion and silicon enrichment at the grain boundaries. The objective of the present work was to perform laboratory tests in order to better understand the role of Si on the microstructure, electrochemical behavior and susceptibility to SCC of austenitic stainless steels. Little or no effect was found on the effect of Si on the electrochemical behavior in high temperature water of type 304 SS containing from less than 1% Si up to 5% Si in the bulk. Similarly, current SCC crack growth rate results are not conclusive regarding a consistent effect of the bulk concentration of Si on the SCC resistance of the stainless steels.

Keywords: Austenitic stainless steels, silicon, electrochemical behavior, repassivation rate, stress corrosion cracking