Corrosion and high-temperature deformation characteristics of a target structural material for transmutation applications

Tensile properties of quenched and tempered martensitic Alloy EP 823, a target structural material, have been evaluated at temperatures ranging from ambient to 600°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 90°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.

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor dc:publisher

University of Nevada, Las Vegas

Year

2004

Author dc:creator

• Kukatla, Srinivasa Rao

Contributors dc:contributor

• Ajit K. Roy

Statement dc:rights

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

Language dc:language

English

Identifier

https://oasis.library.unlv.edu/rtds/1686

OAI identifier oai:identifier

oai:oasis.library.unlv.edu:rtds-2685