The defect structure and superconducting transition of cold-worked niobium

Thompson, Spencer; Flewitt, Peter E J

doi:10.1016/0022-5088(75)90071-5

Cited by 28 publications

(2 citation statements)

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“…THOMPSON and FLEWITT [TH075], as the result of a comprehensive magnetic study of the superconducting transition temperatures and deformation microstructures of cold-rolled and cold-drawn Nb, found that for deformations of up to 10% Tc increased linearly with the dislocation density, but that at higher levels of deformation during the development and refinement of a cellular structure (Section 2.8) Tc decreased linearly with cell size. On the other hand, during the zero-field segment of a study of the influence of deformation on the calorimetrically observed transition of Nb into the superconducting mixed state, ZUBECK et al [ZuB79] found that compressive strains of up to 75% (reduction in thickness) resulted in continuous increases in both the temperature and width of the superconducting transition.…”

Section: Deformation Of Pure Elementsmentioning

confidence: 99%

Applied Superconductivity, Metallurgy, and Physics of Titanium Alloys

Collings¹

1986

205

125

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All rights reservedNo part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission from the Publisher To BETTY JANE AND CHRISTOPHER also to an international community of low-temperature physicists and cryogenic engineers whose work is represented on these pagesType-2 Superconductor in the Critical Mixed State.-Carbon-replicated electron micrograph of a ferromagnetic-particle-decorated representation of the arrangement of axially directed flux lines in an annealed-and-deformed Pb-In(6.3 at.OJo) 4-mm!6 rod in the trapping critical state (see, e.g., Figure 16-7). The arrangement of the flux lines was found to change continuously from long-range-ordered in the relatively high field (-70 G) interior region of the sample (;;, 400 ,an deep) [left-hand plate], to amorphous in the low-residual-field region just below the surface (,,; 100,an deep) [right-hand plate]. In this material, for which K = 2 at 1.2 K, the flux-lattice parameter at 70 G is about 0.6 I'm. Original micrograph courtesy of U. Essmann, Max-Planck-Institute fUr Metallforschung, Institut fUr Physik, Stuttgart, West Germany. (Reference: H. Trauble and U. Essmann, J. Appl. Phys. 39,4052-4059 (1968))1.General Preface xi property optimization. (iii) Superconductor and superconducting magnet design engineers for whom the chapters on Stability, AC Loss, and Conductor Design are intended. (iv) Manufacturers of "NbTi" alloy superconductors who wish to become reapprised of the Ti-alloy metallurgy and metal physics that underlies the behavior and properties of their product. Administrative Credits and Genesis

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Section: Deformation Of Pure Elementsmentioning

confidence: 99%

Applied Superconductivity, Metallurgy, and Physics of Titanium Alloys

Collings¹

1986

205

125

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“…As a result of this investigation , the form factor , f(h), is found to be given by 3) and the exponent in the scaling law , m , is approximately }. The scaling law becomes…”

Section: ~~~~~~mentioning

confidence: 86%

Fluxoid pinning by vanadium carbide precipitates in superconducting vanadium

et al. 1978

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Results of texture simulation in b.c.c. materials

Dörfel¹

1988

Cryst. Res. Technol.

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Results of Texture Simulation in b.c.c. MaterialsRolling textures of b.c.c. polycrystals are simulated by the "full constraint" (FC)and the "relaxed constraint" (RC)-Taylor model, by the FC-model with glide asymmetry in (1123 (111> slip systems included, by a combination of FCand RC-model, and by t.hk combination with glide asymmetry included, respectively. Several cases of activated slip system farnilies have been investigated. Simulation results are compared qualitatively with experimental ones.Walztexturen von kubisch-raumzentrierten Polykristallen werden mit Hilfe des Taylor-Modells mit vollstandigen bzw. abgeschwachten Deformationsbedingungen (FCbzw. RC-Modell) und durch Kombination und Erweiterung dieser Modelle unter Berucksichtigung der in der Gleitsystemfamilie (1 12) < 11 1 ) auftretenden Gleitasymmetrie simuliert. Verschiedene FIille von aktivierten Gleitsystemfarnilien werden untersucht. Es erfolgt ein qualitativer Vergleich der Siniulationscrgebnisse mit experimentellen Werten. WASILEWSKI, R .

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The defect structure and superconducting transition of cold-worked niobium

Cited by 28 publications

References 12 publications

Applied Superconductivity, Metallurgy, and Physics of Titanium Alloys

Applied Superconductivity, Metallurgy, and Physics of Titanium Alloys

Fluxoid pinning by vanadium carbide precipitates in superconducting vanadium

Results of texture simulation in b.c.c. materials

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