Award Date
1-1-2005
Degree Type
Thesis
Degree Name
Master of Science (MS)
Department
Mechanical Engineering
First Committee Member
Ajit K. Roy
Number of Pages
115
Abstract
Tensile testing involving Alloy C-22 and Nb1Zr exhibited reduced strength with increasing temperature within a range relevant to the Hlx decomposition process. A reduction in failure strain was however, noted, at 100°C possibly due to dynamic strain aging effect. Even though the ductility parameters were not influenced by the change in temperature in stress-corrosion-cracking (SCC) testing in an acidic solution the true in this alloy was reduced appreciably. Nb1Zr did not exhibit any failure stress conventional SCC pattern. The critical potentials for localized corrosion in both alloys became more active at higher temperatures. No cracking was observed with C-ring and U-bend specimens of Alloy C-22 in a similar environment at 150°C. The corrosion rate of Alloy C-22 was gradually reduced for exposure up to 28 days followed by an enhancement at a longer duration. The characterization of primary fracture surface of cylindrical specimens used in tensile and SCC testing exhibited dimpled microstructure, indicating ductile failures.
Keywords
Characterization; Corrosion; Cycle Materials; Metallurgical Structural
Controlled Subject
Materials science; Mechanical engineering; Materials science
File Format
File Size
1802.24 KB
Degree Grantor
University of Nevada, Las Vegas
Language
English
Permissions
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Repository Citation
Santhanakrishnan, Radhakrishnan, "Metallurgical and corrosion characterization of structural materials for S-I cycle" (2005). UNLV Retrospective Theses & Dissertations. 1905.
http://dx.doi.org/10.25669/37gx-8yut
Rights
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