ANALYSIS OF THE INFLUENCE OF TEMPERATURE
AND DEFORMATION ON THE STABILITY
OF THE GRANULAR STRUCTURE OF ALLOYS
CONTAINING SECOND-PHASE PARTICLES

N. V. Selivanov and I. V. Neupokoeva

UDC 548.539.001

Analysis of the influence of thermal, mechanical, and 
electromagnetic actions on the stability of the granular structure 
of dispersion-hardened alloys with a uniform distribution of incoherent 
mobile particles of constant radius has been performed. It has been 
shown that of all parameters describing the process of interaction 
between the grain boundary and particles, only the relative mobility 
 is a function of temperature. An expression for 
the relative mobility, universal for all metals, has been obtained 
in the approximation in which the particles in the crystal matrix 
participate in the diffusion motion according to the Geguzin model 
(volume flow mechanism). It has been shown that the influence of the 
test temperature on the relative mobility  and, 
therefore, on the stability of the granular structure is determined 
by the ratio of the activation energy of grain-boundary migration 
H to the activation energy of particle motion Q.

Astrakhan State Technical University, 16 Tatishchev Str., 
Astrakhan, 414025, Russia; e-mail: nselivanov@mail.ru. Translated 
from Inzhenerno-Fizicheskii Zhurnal, Vol. 78, No. 6, pp. 100-105, 
November-December, 2005. Original article submitted July 27, 2004.