DEVICE FOR ANALYZING ELASTIC CONSTANT METALS WITH LOW PLASTICITY AND ALLOYS AT HIGH TEMPERATURE Russian patent published in 2018 - IPC G01N3/08 

FIELD: measurement technology.

SUBSTANCE: invention relates to the analysis of strength properties of materials by optical measuring means by applying compressive static loads to them. Device comprises a base with a fixed plate and a movable plate. On the basis of a laser, beam splitter and mirror, which are located in the direction of its emission, whose reflected rays form the standard shoulders of two-arm interferometers of, respectively, transverse and longitudinal deformations. In the working arm of the interferometer of transverse deformations, the mirror side surface of the sample of rectangular cross-section is located, and when using two opposite side surfaces of the sample, the device is equipped with three mirrors located along the path of radiation in the working arm. Beam of the working arm of the longitudinal strain interferometer is guided through a mirror inclined at an angle of 45 degrees to the surface of the fixed plate on the mirror surface of the movable plate. Electrodes connected to a direct current source are installed on the outer sides of the plates. Semiconductor layer is placed between one of the plates and the corresponding electrode. For stable heating, the semiconductor layer is also placed between the second plate and the second electrode. Sample is placed between the plates, preload is set, a constant electric current is passed between the electrodes. After heating the sample, it is deformed, the loading force and temperature of the sample are continuously recorded with a thermocouple. Count of the displaced interference lines is made by means of two collimators, two diaphragms, two photodetectors and an electronic processing circuit, arranged successively after the interferometers along the reflected rays of the working arms.

EFFECT: increased accuracy of measurements of the elastic constants of low-plastic metals and alloys at high temperatures.

3 cl, 3 dwg