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Title: Effect of nanostructuring on the elastic properties of aluminum alloy AMg6

We experimentally investigated the nanostructuring effect on the elastic properties of aluminum alloy AMg6 (Al–Mg–Mn system). The n-AMg6 nanostuctured specimens were prepared from a commercial polycrystalline alloy by refining and homogenizing a mixture of small chips of the alloy in a planetary mill. The resulting product consists of 200-500-micron agglomerates of nanoparticles with average nanoparticle size ∼ 40–60 nanometer according to the X-ray analysis. The compacted nanopowder was extruded at a temperature of 300°C with a reduction of cross-sectional area at least 4 times to 90 mm diameter. High resolution transmission electron microscopy studies confirmed the presence of the nanostructure with a grain size of ∼60 nanometers. For the experiments, nine parallelepiped shape specimens of 20×20×40 mm{sup 3} size were cut from the central and peripheral parts of the n-AMg6 rod. We measured of the second-order and third-order elastic coefficients of the obtained samples by ultrasonic method. The same measurements were made on specimens of the primary AMg6 alloy for comparison.
Authors:
;  [1] ; ; ;  [2]
  1. Technological Institute for Superhard and Novel Carbon Materials. Centralnaya 7a, Moscow, Troitsk, 142190 (Russian Federation)
  2. Department of Acoustics, Faculty of Physics, M.V. Lomonosov Moscow State University. Leninskie gory 1, Moscow, 119991 (Russian Federation)
Publication Date:
OSTI Identifier:
22489040
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1685; Journal Issue: 1; Conference: 20. international symposium on nonlinear acoustics, Ecully (France), 29 Jun - 3 Jul 2015, 2. international sonic boom forum, Ecully (France), 29 Jun - 3 Jul 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ALUMINIUM BASE ALLOYS; COMPARATIVE EVALUATIONS; ELASTICITY; GRAIN SIZE; MAGNESIUM ALLOYS; MANGANESE ALLOYS; MIXTURES; NANOPARTICLES; NANOSTRUCTURES; POLYCRYSTALS; POWDERS; REFINING; RESOLUTION; TRANSMISSION ELECTRON MICROSCOPY; ULTRASONOGRAPHY; X RADIATION