NASA Scientific and Technical Aerospace Reports

chemical compositional variation, hydrogen distribution, and stress on weld corrosion.
DTIC
Corrosion; Fusion Welding; Residual Stress; Stress Corrosion; Welded Joints
20040111710 Colorado School of Mines, Golden, CO
Advanced Methods for Highly-Portable Field Repair Welding and Assessing Phase Stability and Aging of Alloys in
Service
Olson, David L.; Park, Yeong-Do; Sep. 3, 2004; 28 pp.; In English
Contract(s)/Grant(s): DAAD19-01-1-0375
Report No.(s): AD-A425866; MT-CWJCR-004-027; ARO-41923.19-MS; No Copyright; Avail: CASI; A03, Hardcopy
New welding consumables and practices for weld repair are being investigated. Special attention was given to the repair
of light metals (aluminum and magnesium alloys). Metal powder filled cored aluminum wires to be used with microwire GMA
spool hand held guns were being developed. The use of strip-to-wire mill to make powder metal-cored wires was being
perfected as an effective methodology for making specialty alloy welding consumable wires. These wires are for repairing
technical assemblies made of specialty alloys. New non-destructive electronic property measurement techniques were
investigated to assess the service life of time-dependent alloys, to determine the residual stress associated with welds and to
assess the corrosion life of structures.
DTIC
Aging (Materials); Aging (Metallurgy); Corrosion; Residual Stress; Stability; Welding
20040111715 Army Engineer Research and Development Center, Vicksburg, MS
Evaluation of Thorium-232 Distribution at Kirtland Air Force Base, Defense Nuclear Weapons School, Training Site
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Larson, Steven L.; Ballard, John H.; Bednar, Anthony J.; Shettlemore, Melissa G.; Morgan, John C.; Jul. 2004; 113 pp.; In
English; Original contains color illustrations
Contract(s)/Grant(s): DAAE30-00-D-1011
Report No.(s): AD-A425881; ERDC/EL-TR-04-11; No Copyright; Avail: CASI; A06, Hardcopy
Ranges used at Kirtland Air Force Base, Albuquerque, NM, to train personnel in the identification of areas containing
radioactive contamination provide an excellent test case for environmentally responsible training. These training sites have
restricted access, and operations are conducted in compliance with a current Nuclear Regulatory Commission license. In order
for the training to be realistic, the ranges have been amended with thorium oxide to simulate a plutonium spill. The
environmental concern from the operation of these ranges is thorium migration through three mechanisms: wind, surface
water, and vertical migration to groundwater. Field measurements have mapped thorium-232 distribution at the site, and led
to laboratory experiments to determine mobility mechanisms. Column leaching experiments have shown that vertical
migration is minimal, in agreement with field results. Soil extraction experiments indicate that thorium desorption from soil
is colloidal. Additionally, electrokinetic experiments suggest thorium migration as a negative complex, possibly associated
with organic matter. Soil stabilization techniques are being tested to determine an optimum method for reducing thorium
mobility.
DTIC
Contamination; Education; Ground Water; Nuclear Weapons; Radioactive Isotopes; Radioactivity; Schools; Thorium;
Thorium Isotopes
20040111970 Academy of Sciences (Russia), Moscow, Russia
High Strain Rate Superplastic Behavior of Al-Li-Mg- Cu-Sc Alloy Subjected to Severe Plastic Deformation
Shagiev, M. R.; Motohashi, Y.; Musin, F. F.; Kaibyshev, R. O.; Sitdikov, O.; Sep. 2003; 27 pp.; In English; Original contains
color illustrations
Report No.(s): AD-A425610; No Copyright; Avail: CASI; A03, Hardcopy
No abstract available
Aluminum Alloys; Magnesium Alloys; Plastic Deformation; Strain Rate; Superplasticity
20040111991 Technology Assessment and Transfer, Inc., Annapolis, MD
Improved IR Windows for Severe Aerothermal Environments
DiGiovanni, Anthony; Jun. 30, 2004; 36 pp.; In English
Contract(s)/Grant(s): N00167-04-C-0018
Report No.(s): AD-A425711; TR-06; No Copyright; Avail: CASI; A03, Hardcopy
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