Kinetics of anomalous fracture of a titanium alloy sample

Grinevich A.V., Sibayev I.G., Naprienko S.A., Kashapov O.S., Kalashnikov V.S.
UDC
669.018.44:669.295
DOI
10.18577/2307-6046-2026-0-5-145-158
Article PDF (Russian) (2.1 MB)
How to cite
Grinevich A.V., Sibayev I.G., Naprienko S.A., Kashapov O.S., Kalashnikov V.S. Kinetics of anomalous fracture of a titanium alloy sample // Proceedings of VIAM. 2026. No. 5. DOI: 10.18577/2307-6046-2026-0-5-145-158. URL: https://test.viam.ru/en/journal/2026/5/12
Keywords
strength, ductility, brittle fracture, stress intensity factor, titanium alloy, anomalous fracture
Abstract

When evaluating the mechanical characteristics of stamping titanium alloy VT46 of the Ti–Al–Sn–Zr–β-stabilizers system, researchers encountered anomalous fracture of a titanium sample during a standard tensile test. The anomaly of the destruction is that it occurred by a brittle mechanism in the area of the forming neck during general plastic deformation. An assessment of the stress intensity factor at the site of brittle fracture revealed that crack-like defect size is insufficient for the brittle mechanism of crack development under the action of accumulated energy in the loading system. The authors of the study put forward the hypothesis about the formation of an enlarged brittle region (static growth of a crack-like defect) during plastic deformation, which leads to fracture by a macrobrittle tearing mechanism.

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