Apparatus for determining residual stresses in porous materials and coatings

摘要

The utility model is used to determine the amount of residual stresses in porous materials and coatings and can be used in mechanical engineering, instrument making, metallurgy, electronic and other industries. The utility model is aimed at improving the accuracy of determining the magnitude of residual stresses by eliminating error due to distortion stress state of the sample associated with the dissolution of materials in the pores and in the stress relaxation periods after removal of another surface layer. Said technical result is achieved in that the device for determining the residual stress in porous materials and coatings, comprising a thermostatic cell electrolyte, a cathode, electrically insulating support for the installation of the test sample attached to the end surface of the lever, a constant current source, the controlled switch, analog-to-digital converter, a time counter, the deflection sensors and twist angle of the sample, and the strain gauge computers, provided with an electrode connected in series with alignment, the meter electrode potential, the first input of which is connected via a threshold element to the input of the controlled switch and the second output - to an input of the computer, to the output of which are connected respectively outputs the analog-digital converter, the time counter and the strain gauge, and the sample through the reference electrode connected to input electrode potential meter. 1 Fig.