Computer simulation methods which had been developed for hexagonal close-packed crystals were used to analyze the effect of the strength of point obstacles upon the motion

of glide dislocations through composite ensembles of point obstacles and forest dislocations. Specific features were established that were related to the possible interchangeability of physically different single-component ensembles of point obstacles in composite ensembles. In particular, it was shown that the possibility of forest dislocations undergoing forced vibrations increased the transparency of a composite ensemble. As the amplitude of dislocation vibrations reached a certain limit (depending upon the strength of the point obstacles) the obstacles in the composite ensemble completely lost their ability to hinder the motion of glide dislocations.

Effect of the Strength of Point Obstacles on the Processes of Motion of Gliding Dislocations through Composite Ensembles of Forest Dislocations and Point Obstacles. B.M.Loginov, A.N.Proskurnin, S.V.Rybkin: Physics of Metals and Metallography, 2002, 93[4], 310-6