METHOD OF DETERMINING PLASTICITY PEAK FOR METALS Russian patent published in 2019 - IPC G01N3/08 

FIELD: metallurgy.

SUBSTANCE: invention relates to prediction of maximum deformation of metals and their alloys. Method for determining plasticity peak for metals, involving axial expansion of flat and round samples at a fixed test temperature, characterized in that deformation rate at which we have maximum value of relative elongation δ₅,_max, are determined by formulas: for a flat sample δ₅,_max = 4A_*E / 3cμσc₀₂ at , and for round sample δ₅,_max = A_*E/3cμσ₀₂ at . Here, respectively, E is Young's modulus, c is sound velocity of longitudinal waves in metal, A_* is effective destruction energy, μ is dynamic viscosity coefficient, σ₀₂ is yield point.

EFFECT: technical result is enabling determination of conditions under which metal is maximally deformed without destruction.

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