| Characterization of Surface Film Growth During Electrochemical Process: Nickel/Nickel Alloys in Seawater |
NOV 2006 |
89 pages |
| Authors:
A. S. Rao; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SURVIVABILITY STRUCTURES AND MATERIALS DIRECTORATE
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 | In order to better understand the formation of films during corrosion processes, an analytical technique using x-ray diffraction was developed to examine the structure of compounds in closest proximity to the metal liquid interface. The in situ structure at the metal liquid interface was examined for pure nickel, 90-10 and 70-30 Cu-Ni alloy in seawater solution at room temperature. The nickel-seawater system was investigated at potentiostatically controlled potentials of -800 ... |
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| Modeling High Carbon and High Nickel Steel: Effect of Heat Treatment Time |
JAN 2005 |
32 pages |
| Authors:
A. S. Rao; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
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| In order to understand the effect of heat treatment on the mechanical properties such as the yield strength (5 (02%)), ultimate stress (Su), deformation (d (%)), reduction in area of cross section (RA(%)) and Charpy v-notch test (CVN) values, a neural network analysis approach was undertaken to analyze the data obtained on 10% nickel steel. Initially the neural network was trained using the experimental data collected from 121 data sets ... |
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| Processing and Property Evaluation of Silver or Aluminum Matrix YBa2Cu306+x Superconducting Materials. |
1993 |
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| Authors:
A. S. Rao; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD SURVIVABILITY STRUCTU RES AND MATERIALS DIRECTORATE
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 | In order to understand the physical behavior at the atomistic level of the superconducting metal matrix composites, both aluminum/yba2cu306+x and silver/yba2cu306+ composites have been investigated. the results suggest that silver forms superconducting composites in the concentration range 10 - 72 wt %. the aluminum based compsites showed the superconducting property only for compsites containing 60 wt % aluminum and 40 wt % yba2cu306+x. in addition, it was found that the ... |
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| Method of Producing YBA2CU3O6+x Superconductors with High Transition Temperatures. |
08 JAN 1991 |
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| Authors:
A. S. Rao; Om P. Arora; Louis F. Aprigliano; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A method for improving the superconducting transition temperature of the MBA2Cu3Ox where M is selected from the group consisting of Y, Er, Eu, Yb, Dy and Ho and where x is a value of from 6 to 7 ceramic by utilizing specific sequences of heat treating times and temperatures in conjunction with the use of silver oxide in making superconducting devices or wires for ultimate use in motors, generators and ... |
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