Температурная зависимость твердости интерметаллидов с участием Al и некоторых эвтектических сплавов на их основе

Мордовец, Н. М.

Temperature dependences of the hardness of the intermetallics Ni3Al, TiAl, and Al63Ti26Cr11 (L12-type) and the eutectic alloys Al53Ti21Cr26 (<$E roman L1 sub 2~+~beta>), (<$E beta> - solid solution on the base of chromium) and AlxTiyCrz (V, Mn, Re) (<$E roman L1 sub 2~+~beta>) have been obtained in a wide region of temperatures (from the liquid nitrogen temperature to the temperature of recrystallization). On the base of these dependences, the activation energy of dislocation motion <$E U sub 0>, activation volume V, characteristic temperature of deformation <$E T sup *>, and other physical parameters of alloys have been calculated. The values of the activation energy of dislocation motion are near to values of <$E U sub 0> for transition metals with bcc lattices, and the values of activation volumes are near to <$E b sup 3> (b - Burgers vector), as for bcc-metals. This is the evidence of a big value of the covalent part of interatomic bonds for these alloys.


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