Cu/Nb nano-composite wires processed by severe plastic deformation for applications in high pulsed magnets: effects of the multi-scale microstructure on the mechanical properties
- Univ Poitiers, ENSMA, CNRS, Inst Pprime, SP2MI, F-86962 Poitiers, (France)
- UPS, UJF, INSA, Lab Natl Champs Magnet Intenses, CNRS, F-31400 Toulouse, (France)
- CEA Saclay, DEN, DANS, DMN,SRMA, F-91191 Gif Sur Yvette, (France)
Copper-based high strength and high electrical conductivity nano-composite wires reinforced by Nb nano-tubes are prepared by severe plastic deformation, applied with an Accumulative Drawing and Bundling process (ADB), for the windings of high pulsed magnets. The ADB process leads to a multi-scale Cu matrix containing up to N = 85{sub 4} (52.2.10{sup 6}) continuous parallel Nb tubes with diameter down to few tens nano-meters. After heavy strain, the Nb nano-tubes exhibit a homogeneous microstructure with grain size below 100 nm. The Cu matrix presents a multi-scale microstructure with multi-modal grain size distribution from the micrometer to the nano-meter range. The use of complementary characterization techniques at the microscopic and macroscopic level (in-situ tensile tests in the TEM, nano-indentation, in-situ tensile tests under high energy synchrotron beam) shed light on the interest of the multi-scale nature of the microstructure to achieve extreme mechanical properties, therefore allowing for design guidelines to further improve these properties. (authors)
- OSTI ID:
- 22273980
- Journal Information:
- IEEE Transactions on Applied Superconductivity (Print), Vol. 22, Issue 3; Other Information: Country of input: France; 17 refs.; This record replaces 45095213; ISSN 1051-8223
- Country of Publication:
- United States
- Language:
- English
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