Measurements of electrical and mechanical properties of aluminum composite cryoconductors /
(Fe, Ce, Si, Mg, etc.) from the alloy matrix. The result of
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1994.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (Fe, Ce, Si, Mg, etc.) from the alloy matrix. The result of (RRR) of five (5) composite aluminum cryoconductor wires and 750 to 2242 when annealed at 400'C for 20 minutes In adjacent samples of the same wire type. Values of RRR are and cooling rate. This investigation is primarily undertaken and RRR probe construction design details. and to learn about the sensitivity of wire RRR to variations annealing study include annealing temperature, annealing time approximately 400'C, and the optimum annealing time lies between 5 to 200 minutes. This broad range in annealing contamination is occurring by the diffusion of impurity atoms crystal defects and allow recovery, recrystallization and dependent on the number of filaments, the purity of the electrical or mechanical property differences between general, single filament cryoconductors show larger RRR grain growth to proceed. The removal of crystal defects will in the heat treatment schedule. Wires are annealed to remove include the wire diameter, number of pure aluminum filaments, increase the RRR as a function of time and temperature. At initial filament RRR, matrix alloy composition and manufacturing method. The dependent variables for the matrix and filament purity. RRR results cover a range from maximum. mechanical properties on fifteen (15) aluminum cryoconductor on fifteen (I 5) cryoconductor wires are also examined at Other highlights in this thesis include a post annealing recovery study, computerized data acquisition source code room temperature and 4.2K. Results show cryoconductors sample variability. Sample variability is defined as the strength, ultimate tensile strength and percent elongation The optimum annealing temperature for the five (5) wires is The results of annealing on the residual resistance ratio the same time recovery is taking place, filament these two situations is a RRR vs. time curve that exhibits a times is caused by physical differences in wire types and to determine the optimum post manufacturing heat treatment values compared to the four (4) filament conductors. Yield weakest. which appear to have high RRR values are usually the wires are presented. The independent variables of the study |
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| Item Description: | "Major subject: Mechanical Engineering". Vita. |
| Physical Description: | xii, 119 leaves : illustrations ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references. |