Master of Science (MS)
First Committee Member
Ajit K. Roy
Number of Pages
Austenitic Alloy C-22 has been tested for evaluation of its tensile and corrosion properties under conditions relevant to the nuclear hydrogen generation process known as the sulfur-iodine cycle. The results of tensile testing indicate that this alloy may be capable of maintaining metallurgical stability and enhanced ductility at temperatures up to 600Ã‚Â°C. The stress-corrosion-cracking data suggest that this alloy may not undergo cracking in an acidic solution at 90Ã‚Â°C at constant-load, the true failure stress (of) was significantly reduced under a slow-strain-rate condition using both smooth and notched specimens. The magnitude of the critical potentials determined by a polarization technique became more active with increase in temperature. The application of anodic control potential resulted in enhanced cracking tendency of Alloy C-22 showing reduced ductility, failure time and sigmaf. The corrosion rate in a similar environment at 150Ã‚Â°C was enhanced at longer test duration showing a nonlinear weight loss versus time relationship. The fractographic evaluations of the broken specimen by scanning electron microscopy revealed dimpled microstructure indicating a ductile failure.
Alloy; Application; Behavior Corrosion; High; Metallurgical; Temperature
Mechanical engineering; Materials science; Materials science
University of Nevada, Las Vegas
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Karamcheti, Raghunandan A, "Corrosion and metallurgical behavior of alloy C-22 for high-temperature applications" (2006). UNLV Retrospective Theses & Dissertations. 2003.
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