METHOD OF DETERMINING THE STRUCTURES OF METAL IMPERIAL VISCOSITY IN TEST FOR SHOCK BENDING Russian patent published in 2017 - IPC G01N3/30 

FIELD: metallurgy.

SUBSTANCE: destruction of the sample (A) is determined at a constant temperature. Two samples with the same stress concentrators and different cross-sectional dimensions at the incision site are tested, and the nucleation and propagation work for the first crack (A_Z1 and A_p1) and for the second (A_Z2 and A_p2) of the samples are calculated by the formulas: A_Z1=a₁⋅α; A_Z2=a₂⋅α; A_Pl=a₁⋅H₁⋅β; A_P2=a₂⋅H2⋅β, where α - specific work of crack initiation in samples of this material; β - the specific work of crack propagation for a given material is calculated from the system of equations where A₁ and A₂ - impact work for the first and second samples, a₁, H₁ and a₂, H₂ - dimensions of the cross section of the first and second samples in the place of the incision.

EFFECT: expansion of the technological capabilities of the method of dividing the work of impact into the work of nucleation and propagation of a crack.

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