Thermodynamic criterion for predicting the brittleness and plasticity of metals

S. D. Shafrai^a, T. N. Hatsevich<sup>b

a</sup> Novosibirsk State Engineering Academy, 630008, Novosibirsk
^b Siberian State Geodetic Academy, 630108, Novosibirsk

Abstract: A brief comparative analysis of the various methods of evaluating the brittle fracture of metals is given. A plasticity index for metals is proposed and substantiated, and the relation describing its effect on the relative contraction at rupture is obtained.

UDC: 531:539.214

Received: 01.04.1998

 English version: Journal of Applied Mechanics and Technical Physics, 1999, 40:6, 1148–1154