ҚҰРЫЛЫС МАТЕРИАЛДАРЫНЫҢ ФИЗИКО-МЕХАНИКАЛЫҚ ҚАСИЕТТЕРІНІҢ ТЕМПЕРАТУРАҒА ТӘУЕЛДІЛІКТЕРІН ЗЕРТТЕУ

Abstract

The article experimentally studied the physical and mechanical properties of steel grade 09G2C, widely used in construction. The design of the installation for conducting research is described, methods for determining the temperature of the test sample and the heat capacity of elastic linear and transverse waves propagating in it are described. We measured the velocities of linear and transverse ultrasound waves in the temperature range (220-380)К every 10К of temperature stepwise. As a source emitting a wave and a receiver receiving it, we used a quartz piezoelectric element with a resonant frequency of 10 MHz. The temperature of the sample was measured with a proof of ±1°C using a copper-constantane thermal bag. We used a heater made of dry ice steam and tungsten to cool the cylindrical sample. Graphs of temperature dependences of elastic modulus at atmospheric pressure are constructed using experimentally measured parameters using well-known formulas in structural mechanics, and the results obtained are theoretically discussed.