Title page for ETD etd-04182009-041018


Type of Document Master's Thesis
Author Iyer, Venkatramani S.
URN etd-04182009-041018
Title Effect of residual stress gradients in austenitic stainless steels on stress corrosion cracking
Degree Master of Science
Department Materials Engineering
Advisory Committee
Advisor Name Title
Hendricks, Robert W. Committee Chair
David, Stan A. Committee Member
Landgraf, Ronald W. Committee Member
Reynolds, William T. Jr. Committee Member
Keywords
  • Stress corrosion
Date of Defense 1991-02-05
Availability restricted
Abstract

The effect of the residual stresses developed during simulated weld heat affected zone in austenitic stainless steel specimen on the stress corrosion cracking susceptibility was studied. Residual stresses was measured using X-ray diffraction technique. Boiling Magnesium Chloride was used as corrosive environment. Compressive stresses developed in the HAZ of the specimen and in regions away from the HAZ stress free values were obtained. The magnitude of the stress gradient decreased as the peak temperature attained during simulated welding decreased. Transgranular cracks were observed in the compressive stress gradient region and time to cracking decreased with increasing stress gradient. Higher nickel content alloys took longer to crack as opposed to lower nickel content alloys at approximately the same stress gradient.

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