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DEVELOPMENT OF OBTAINING PROCESSES AND INVESTIGATION OF PROPERTIES OF FOAM METALS FOR USE AS MECHANICAL ENERGY ABSORBERS

  • : Alexander Ilyushchenko1, Oleg Smorygo, Alexander Marukovich
  • : 1Powder Metallurgy Institute
  • : PDF Download
  • : 2014

Abstract

The influence of structure (porosity, pore size) and frame (chemical composition, microstructure, alloying additives) properties on damping properties of high-porosity foam metals with open-cell and closed-cell structure based on Ni, Fe-Ni and Ti has been investigated. Open-cell foam metals were obtained by the method of electrochemical deposition of nickel on the high-porosity organic substrate (polyurethane foam); closed-cell foam metals were obtained by pressing of composite granules consisting of spherical organic porogen with a layer of metallic powder applied to it. The open-cell foam metals at the porosity of 80-95% have the following values of damping properties: yield strength 2.8-2.9 MPa, amount of mechanical energy absorbed during deformation 50% 3.1-3.6 MJ/m3, and mechanical energy absorption efficiency 0.70-0.78. The closed-cell foam metals at the porosity of 70-90% have the following values of damping properties: yield strength 4.2-2.1 MPa, amount of mechanical energy absorbed during deformation 50% 5.2-5.4 MJ/m3, and mechanical energy absorption efficiency 0.58-0.63.

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