EXPERIMENTAL EVALUATION OF δ_(1c)-CURVE TEMPERATURE SHIFT AND BRITTLE-TOUGH TRANSITION OF STRUCTURAL STEELS AND WELDED JOINTS BY THE RESULTS OF STANDARD TESTS

摘要

Investigation results are given on fracture toughness based on the deformation criterion for the most common domestic low-alloy structural steels of different thicknesses, An approach to evaluation of the brittle-tough transition temperature depending on the thickness of the investigated rolled metal is suggested, Shift of the basic deformation δ_(1c)-curve depending on the thickness of the rolled metal and its standard strength characteristics was experimentally verified.