METHOD DETERMINING CRITICAL TEMPERATURE OF BRITTLENESS OF METALS AND ALLOYS Russian patent published in 1997 - IPC

FIELD: testing equipment for testing of mechanical properties of metals and alloys, testing of welded samples in particular. SUBSTANCE: sample is cooled, loaded, steepness of temperature dependence is calculated as tangent of inclination of HB to axis of temperatures. Degree of steepness of this dependence is used for determination of critical temperature of brittleness which is found by dependence lnT_CR= K₁lnα+K₂,, where T_CR is critical temperature of brittleness; α is tangent of inclination angle of temperature dependence of hardness in coordinates lnHB-T; HB is Brinell hardness; Κ₁ and Κ₂ are coefficients found experimentally for each class of metals and alloys. EFFECT: enhanced authenticity of method. 1 cl, 5 dwg