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Title: Investigation of structure and properties of the Nb rods manufactured by different deformation and heat treatment regimes in mass production conditions for the Nb{sub 3}Sn strands

From 2009 the mass production of the Nb{sub 3}Sn strands for ITER with the yield of several tens of tons per year operates at JSC Chepetsky Mechanical Plant (Glazov, Russia). In order to enhance the stability of output characteristics of the produced Nb{sub 3}Sn strands, to increase the Nb filaments dimensional homogeneity the manufacture regimes improvement of the used semiproducts such as Nb rods intended for the superconducting filaments formation in the finished strands has been carried out. In the work the investigations of the Nb rheological behavior, the influence of heat treatment in the wide temperature range from 700 to 1300 °C on the predeformed Nb rods structure and mechanical properties have been performed. Different production routes of the Nb rods, including such operations like forging, extrusion and drawing combined with the recrystallization annealings, were used. Composite Nb{sub 3}Sn strands have been produced and their electrophysical properties have been tested. For the first time influence of the niobium rods manufacture regimes on the current carrying capacity of the industrial Nb{sub 3}Sn strands has been investigated.
Authors:
; ; ; ; ;  [1] ;  [2] ; ; ;  [3]
  1. JSC Bochvar High-Technology Research Institute of Inorganic Materials, 5a Rogova St., Moscow, 123060 (Russian Federation)
  2. NRC Kurchatov Institute, 1 Akademika Kurchatova Sq., Moscow, 123182 (Russian Federation)
  3. JSC Chepetsky Mechanical Plant, 7 Belova St., Glazov, 427620 (Russian Federation)
Publication Date:
OSTI Identifier:
22264039
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1574; Journal Issue: 1; Conference: International cryogenic materials conference, Anchorage, AK (United States), 17-21 Jun 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; ANNEALING; DEFORMATION; FILAMENTS; ITER TOKAMAK; MECHANICAL PROPERTIES; NIOBIUM; RECRYSTALLIZATION; TEMPERATURE RANGE