An increase in the rate of plastic deformation under the effect of ultrasound

被引：13

作者：

Blagoveshchenskii, V. V. ^{[1
]}

Panin, I. G. ^{[1
]}

机构：

[1] Kostroma State Technol Univ, Kostroma 156005, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2007年 / 103卷 / 04期

关键词：

62; 20; Fe; 80; +f;

D O I：

10.1134/S0031918X07040163

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The multiplication of dislocations by a Frank-Read source upon a simultaneous effect of constant and harmonic components of external stress has been studied using computer-aided mathematical simulation (the harmonic component of the stress was by an order of magnitude less than the constant component.) It has been found that the number of dislocation loops that have been formed in a time unit depends on the frequency of the harmonic component. A maximum was observed at ultrasonic frequencies. The number of the loops generated can increase by several times. It has been shown that the appearance of a maximum is caused by the fact that the time of loop formation corresponds to the period of ultrasonic oscillations. On this ground, we propose an explanation to the phenomenon of ultrasound-induced plasticization known in the physics of plasticity.

引用

页码：424 / 426

页数：3