METHOD FOR DETERMINING STRENGTH CHARACTERISTICS AND VALUE OF GRAIN IN METALLIC MATERIALS AND ALLOYS

摘要

FIELD: metallurgy.;SUBSTANCE: at least two workpieces of wedge shape are manufactured, and after they are heated to different temperatures, deformation of each workpiece is performed by means of a longitudinal rolling method starting from a narrow end, and cooling is performed at different cooling rates to provide formation of different strength characteristics and size of grain. Each workpiece is divided at least into two specimens; size grain is determined by metallographic investigations, mechanical characteristics of each specimen are determined by strength tests, and temperatures are determined at performance of deformation and cooling rate. A mathematical model is developed, in which results of experimental investigations and calculations of stress-and-strain state of tested workpieces are combined.;EFFECT: lower number of physical experimental investigations and higher quality of summary data.;6 dwg