Master of Science (MS)
First Committee Member
Ajit K. Roy
Number of Pages
Tensile properties of quenched and tempered martensitic Alloy EP 823, a target structural material, have been evaluated at temperatures ranging from ambient to 600Ã‚Â°C as a function of three different tempering times. The susceptibility to stress corrosion cracking and localized corrosion (pitting and crevice) behavior was determined by using slow-strain-rate (SSR) and cyclic potentiodynamic polarization (CPP) techniques, respectively. The results of tensile testing indicate that the yield strength and ultimate tensile strength were gradually reduced with increasing temperature. However, as expected, the ductility parameters were enhanced at elevated temperatures due to increased plasticity. The results of SSR testing, in the 90Ã‚Â°C acidic solution, indicate that the failure stress was increased but the ductility was reduced to some extent at longer tempering times. The CPP results indicate that the critical potentials became more active (negative) at higher testing temperature. Evaluation of the primary fracture face by scanning electron microscopy revealed extensive cracks at ambient temperature but increased ductility at elevated temperatures showing larger plastic zone size.
Applications; Characteristics; Corrosion; Deformation; High; Materials; Structural; Target; Temperature; Transmutation
Materials science; Mechanical engineering
University of Nevada, Las Vegas
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 email@example.com and include clear identification of the work, preferably with URL.
Kukatla, Srinivasa Rao, "Corrosion and high-temperature deformation characteristics of a target structural material for transmutation applications" (2004). UNLV Retrospective Theses & Dissertations. 1686.