Award Date

1-1-2006

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical Engineering

First Committee Member

Ajit K. Roy

Number of Pages

96

Abstract

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 600°C. The stress-corrosion-cracking data suggest that this alloy may not undergo cracking in an acidic solution at 90°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 150°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.

Keywords

Alloy; Application; Behavior Corrosion; High; Metallurgical; Temperature

Controlled Subject

Mechanical engineering; Materials science; Materials science

File Format

pdf

File Size

4024.32 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

Permissions

If you are the rightful copyright holder of this dissertation or thesis and wish to have the full text removed from Digital Scholarship@UNLV, please submit a request to digitalscholarship@unlv.edu and include clear identification of the work, preferably with URL.

Rights

IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Download


COinS