Effect of heat treatment on deformation and corrosion behavior of Type 422 stainless steel

High temperature tensile properties of quenched and tempered martensitic Type 422 stainless steel, a target structural material, have been evaluated in this study at temperatures ranging from ambient to 600°C as a function of three different tempering times. Results of tensile testing indicate that the ultimate tensile strength, yield strength and failure strength were gradually reduced with increasing temperature. However, as expected, the ductility parameters were enhanced due to increased plastic flow at elevated temperatures. The results of stress corrosion cracking tests performed by slow strain rate technique in the 90°C acidic solution revealed higher failure stress and reduced ductility to some extent for specimens tempered for longer time. The results of localized corrosion studies conducted by cyclic potentiodynamic polarization technique indicate that the critical corrosion potential became more active (negative) at higher testing temperature in specimens exposed to both neutral and acidic environments. Evaluation of the primary fracture face by scanning electron microscopy revealed more cracks at ambient temperature with smaller plastic zone size. Increased ductility was observed at elevated temperatures showing larger dimpled areas.

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

• Potluri, Venkata Nagarjuna

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/1695

OAI identifier oai:identifier

oai:oasis.library.unlv.edu:rtds-2694