METHOD OF CONTROLLING STRUCTURAL CONDITION OF ALLOYS BASED ON TITANIUM NICKELIDE Russian patent published in 2020 - IPC G01N29/14 

FIELD: metallurgy.

SUBSTANCE: use: for controlling the structural state of titanium nickelide-based alloys while cooling the alloy in a temperature range containing the transformation interval. Summary of invention consists in the fact that in the cycle of thermoelastic martensitic transformations in titanium nickelide there recorded is the stream of acoustic emission signals, performing spectral analysis, reduction of characteristic spectral lines from 138–132 to 124–126 kHz at cooling in temperature range of transformations from 140 °C to 50 °C and after termination of characteristic spectral lines decrease, structural condition is determined as martensitic.

EFFECT: technical result is high accuracy of controlling elastic moduli of structural state in alloys based on titanium nickelide, which undergo thermoelastic martensitic transformations, high efficiency of monitoring by recording and analyzing the flow of acoustic emission signals in one cycle of thermoelastic martensitic transformations.

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