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in subjects: "Corrosion Resistant Alloys"  
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Repair Welding of Fusion Reactor Components

Description: Recent experimental investigations indicate that the repair welding of irradiated materials containing greater than 1 to 2.5 appm helium leads to catastrophic cracking in the heat affected zone of the weld. The high temperatures and cooling tensile stresses which occur during the welding process lead to enhanced helium bubble growth in the heat affected zone region, resulting in catastrophic cracking upon cooling. An investigation is proposed which seeks to determine the effect of stress state … more
Date: May 20, 1992
Creator: Chin, Bryan A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of cladding strain during simulated transient tests

Description: A diametral extensometer was developed and employed during temperature ramp tests with the Fuel Cladding Transient Tester (FCTT). Plastic strain measurements were performed using unirradiated 20% cold-worked AISI 316 stainless steel tubing ramped at 5.6 and 111/sup 0/C/s with internal pressures from 3.4 to 93.1 MPa. Results demonstrated that plastic deformation can occur at stresses well below the conventional 0.2% yield strength and that most deformation in such tests occurs in the final 50/su… more
Date: July 20, 1979
Creator: Duncan, D. R.; Johnson, G. D.; Hunter, C. W. & Hanson, J. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Corrosion behavior of materials exposed to hypersaline geothermal brine

Description: The corrosion rate and corrosion attack characteristics were determined for thirteen commercially available materials exposed in a geothermal production well for three months. The materials included carbon steels, Cr-Mo alloy steels, martensitic and ferritic stainless steels, high-nickel alloys, and titanium. The environment at the 1800 ft (600 m) depth of exposure was a single phase high salinity brine. The prevailing temperature was 260{sup 0}C and the prevailing pressure was 630 psi (4.0 MPa… more
Date: November 20, 1980
Creator: McCright, R.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaluation of materials exposed to high-velocity, high-salinity, highly mineralized geothermal brine

Description: Using surface traces, scanning electron microscopy, and light microscopy, Ti-, Co-, Ni-, and Fe-base alloys were evaluated for erosion and stress corrosion cracking (SCC) after exposure at about 104{sup 0}C to the nozzle exhaust from acidified geothermal brine. Examples of erosion, SCC, and corrosion are shown. Results are evaluated in terms of synergism between erosion, corrosion, and stress. Repassivation kinetics might play a key role in the formation and growth of erosion cavities. Of the m… more
Date: August 20, 1978
Creator: Goldberg, Alfred & Kershaw, Robert P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electrolytic dissolver for plutonium metal

Description: Laboratory tests have demonstrated that plutonium metal, as well as aluminum, stainless steel, Hastelloy C, and other alloys, can be electrolytically dissolved in nitric acid using the ''solution contact'' approach. Two sources of plutonium metal were evaluated, weapons' grade and a special reactor grade (42% /sup 240/Pu, 12% /sup 241/Pu) from Savannah River, both yielding a dissolution rate of approximately one gram per ampere-hour. A current flow of 150 amperes was attained at 12 volts (limit… more
Date: September 20, 1971
Creator: Fox, R. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Heat-to-heat variations of total strain; to 5 )3<: at discrete stress levels in types 316 and 304 stainless steel from 24 to 316

Description: Tensile tests were conducted on eight heats of randomly selected, mill-annealed type 316 stainless steel and seven heats of mill-annealed type 304 stainless steel at 24, 93, 204, and 316/sup 0/C to establish the effects of heat-to-heat variations on total strain (to 5 percent) at discrete stress levels. Factors of difference were established between maximum and average strain (corresponding to minimum and nominal yield strength material respectively) for regulatory analysis applications. Limite… more
Date: October 20, 1976
Creator: Hammond, J. P. /Sikka, V. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of HAZ liquation cracking susceptibility and HAZ softening behavior in modified 800H

Description: A modified 800H alloy, developed at Oak Ridge National Laboratory (ORNL), is one of the candidate materials designed for high temperature applications. Extensive mechanical and corrosion investigations have been completed and it has been proven that modified 800 has excellent high temperature mechanical and metallurgical behavior. Weldability studies of modified 800H are being carried out at the University of Tennessee, Knoxville. A series of modified 800H alloys and two similar commercial high… more
Date: November 20, 1992
Creator: Lundin, C. D. & Qiao, C. Y. P. (Tennessee Univ., Knoxville, TN (United States). Dept. of Materials Science and Engineering)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling of Stress Corrosion Cracking for High Level Radioactive-Waste Packages

Description: A stress corrosion cracking (SCC) model has been adapted for performance prediction of high level radioactive-waste packages to be emplaced in the proposed Yucca Mountain radioactive-waste repository. SCC is one form of environmentally assisted cracking due to three factors, which must be present simultaneously: metallurgical susceptibility, critical environment, and static (or sustained) tensile stresses. For waste packages of the proposed Yucca Mountain repository, the outer barrier material … more
Date: June 20, 2003
Creator: Lu, S C; Gordon, G M; Andresen, P L & Herrera, M L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Experimental study of plastic responses of pipe elbows

Description: Load-deflection responses were determined experimentally for sixteen 152.4-mm (6-in.) (nominal) commercial carbon steel pipe elbows and four 152.4-mm (6-in.) stainless steel elbows. Each specimen was loaded with an external force of sufficient magnitude to produce predominantly plastic response. The influences of bend radius and wall thickness were studied, as well as the effect of internal prssure on load-deflection behavior. Comparisons of results from stainless steel and from carbon steel el… more
Date: January 20, 1978
Creator: Greenstreet, W. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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