A FIELD-EMISSION MICROSCOPE INVESTIGATION OF THE EFFECTS OF AMBIENT ATMOSPHERES ON THE STRESS-CORROSION CRACKING OF URANIUM-MOLYBDENUM ALLOYS
Abstract
The effects of heat treatment and ambient atmospheres on the stress- corrosion cracking behavior of U-10 w/o Mo were investigated using a field- emission microscope of cylindrical geometry. Cathodic protection and the effect of static electric DC fields were investigated as possible protective techniques in the stress-corrosion cracking of U-10 w/o Mo. A special 'gas shield' protective technique was also investigated. The stress-corrosion cracking behavior of U-10 w/o Mo was found to be influenced by heat treatments. A gamma homogenization and quench followed by a tempering treatment were found to be most beneficial in reducing the susceptibility of the alloy. A tentative 'critical stress' for initiation of stress-corrosion cracking was set at 36,500 psi. This critical stress was found to be strongly dependent upon heat treatments and internal structure. Cathodic protection and electric fields had no effect on the stress-corrosion cracking behavior of U-10 w/o Mo. Pure, dry nitrogen on the other hand, was found to be most effective as a protective shield during cyclic loading of U-10 w/o Mo specimens.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- AD0669252
Entities
People
- Herman Sulsona
- S. A. Hoenig
Organizations
- University of Arizona