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Title: Nanostructured Cu-Cr alloy with high strength and electrical conductivity

The influence of nanostructuring by high pressure torsion (HPT) on strength and electrical conductivity in the Cu-Cr alloy has been investigated. Microstructure of HPT samples was studied by transmission electron microscopy with special attention on precipitation of small chromium particles after various treatments. Effect of dynamic precipitation leading to enhancement of strength and electrical conductivity was observed. It is shown that nanostructuring leads to combination of high ultimate tensile strength of 790–840 MPa, enhanced electrical conductivity of 81%–85% IACS and thermal stability up to 500 °C. The contributions of grain refinement and precipitation to enhanced properties of nanostructured alloy are discussed.
Authors:
;  [1] ; ;  [2] ;  [1] ;  [3]
  1. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa 450000 (Russian Federation)
  2. ICMPE-CNRS, Université Paris 12, 6-8 rue Henri Dunant, 94320 Thiais, cedex (France)
  3. (Russian Federation)
Publication Date:
OSTI Identifier:
22275540
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 19; 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; 77 NANOSCIENCE AND NANOTECHNOLOGY; CHROMIUM; COPPER; ELECTRIC CONDUCTIVITY; GRAIN REFINEMENT; INTERMETALLIC COMPOUNDS; MICROSTRUCTURE; NANOSTRUCTURES; PARTICLES; PHASE STABILITY; PRECIPITATION; TEMPERATURE DEPENDENCE; TENSILE PROPERTIES; TORSION; TRANSMISSION ELECTRON MICROSCOPY