Stress Corrosion Cracking of Uranium Alloys PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Stress Corrosion Cracking of Uranium Alloys PDF full book. Access full book title Stress Corrosion Cracking of Uranium Alloys by Walter F. Czyrklis. Download full books in PDF and EPUB format.
Author: Walter F. Czyrklis Publisher: ISBN: Category : Languages : en Pages : 17
Book Description
The study was carried out to determine the critical threshold intensity for stress corrosion cracking of several uranium alloys which are candidates for ballistic penetrator and nuclear shell applications. The data reported here are for alloys in the as-extruded condition only and will serve as base-line data for future studies involving the solution-treated-and-aged alloys.
Author: Walter F. Czyrklis Publisher: ISBN: Category : Languages : en Pages : 17
Book Description
The study was carried out to determine the critical threshold intensity for stress corrosion cracking of several uranium alloys which are candidates for ballistic penetrator and nuclear shell applications. The data reported here are for alloys in the as-extruded condition only and will serve as base-line data for future studies involving the solution-treated-and-aged alloys.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The stress corrosion cracking behavior of U-21/4, 41/2, 6 and 8 wt % Nb alloys was evaluated in laboratory air and in aqueous Cl− solutions. Thresholds for crack propagation were obtained in these environments. The data showed that Cl− solutions are more deleterious than air environments. Tests were also conducted in pure gases to identify the species in the air responsible for cracking. These data showed the primary stress corrodent is water vapor for the most reactive alloy, U-21/4% Nb, while O2 is primarily responsible for cracking in the more corrosion resistant alloys, U-6 and 8% Nb. The 41/2% alloy was found to be susceptible in both H2O and O2 environments.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
An investigation was conducted to determine the cause of cracking, during tension, on the surface of tensile specimens of U--Mo alloys. The cracking was observed in alloys that were water quenched from a temperature range in which the body-centered cubic gamma phase was stable and, subsequently, stressed in tension. The investigation was carried out on alloys of U--Mo containing 5 and 4 wt% Mo. It was discovered early in the study that the cracking could be eliminated by testing tensile specimens in a He atmosphere. Because of this result, tensile tests were performed in vacuum O22, impure N2, and purified N2. Additional experiments were done to establish the relation of stress state, temperature, strain rate, O2 pressure, stress magnitude, and grain size to the cracking phenomenon. U--4 wt% Mo and U--5 wt% Mo were compared with respect to microstructure and crystal structure, since both alloys cracked during the tensile test. The origin and propagation of cracks in the microstructure were studied, using motion pictures and metallography. The results of the various experiments showed that the cracking occurred only in tension and was caused by stress-corrosion cracking due to the presence of O/sub 2/ in the atmosphere. The rate of cracking increased as the temperature was increased above 25 deg C. Below 10 deg C cracking was not observed in the U-5 wt% Mo alloy. Cracking was not associated with just one metastable phase. since it was observed in both the U-5 wt% Mo and U-4 wt% Mo alloys, which have different crystal structures when rendered metastable by water quenching from the gamma phase field. The path of fracture was transgranular and was not associated with deformation markings in the grains. (auth).
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The stress-corrosion cracking (SCC) behavior of U--6 wt percent Nb in three different heat-treated conditions was investigated. The three heat treatments were: (a) solution quenched (the nonaged condition); (b) solution quenched and aged 6 hours at 250°C (the underaged condition); and (c) solution quenched and aged 80 minutes at 600°C (the overaged condition). The SCC tests utilized smooth, dead-weight loaded, static tensile specimens exposed to nitrogen-saturated or oxygen-saturated water containing 50 ppM chloride ions. The alloy in the solution-quenched condition was not susceptible to SCC when loaded to 90 percent of yield strength in either the oxygen or nitrogen-saturated chloride solutions. The underaged material (6 hours at 250°C) was susceptible to SCC in oxygen or nitrogen-saturated water containing 50 ppM chloride ions. The underaged material was more susceptible to cracking in the oxygen-saturated solution than in the nitrogen-saturated solutions. The SCC in the underaged material proceeded by a principally intercrystalline fracture mode with the overload condition being principally transgranular. The overaged material also exhibited SCC, but to a lesser extent than the underaged material. Here again, cracking was more pronounced in the oxygen-saturated solution than in the nitrogen-saturated solution. The overaged material fractured by a combined SCC mode and mechanical-cracking mode, i.e., stress-corrosion cracks were growing at the same time corrosion was reducing the cross-sectional area of the specimen. The importance of knowing alloy characteristics relates to considerations of design, environmental behavior, and economics.
Author: Walter F. Czyrklis
Author: Walter F. Czyrklis
Author: L. L. Stephenson
Author: John Warren Pridgeon
Author: J. S BULLOCK (IV.)
Author: 
Author: 
Author: 
Author: Benjamin Floyd Brown
Author: 
Author: