PSI - Issue 28

V.V. Balandin et al. / Procedia Structural Integrity 28 (2020) 1802–1807 V.V. Balandin et al. / Structural Integrity Procedia 00 (2020) 000–000

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Fig. 7 shows the results of determining the spall strength of 3M titanium alloy under plane-wave loading. There are also given the results of measuring the tensile strength obtained in experiments using the SHTB method. In plane-wave experiments, the spall strength was investigated in the range of strain rates 2 · 10 4 − 5 · 10 4 s − 1 . The obtained values of the spall strength lie in the range of 1.6 - 4 GPa, which is significantly higher than the values under static loading and the values obtained in experiments by the Kolsky method at strain rates up to 2 · 10 3 s − 1 , which is apparently related to with the influence of the strain rate, and with the influence of the volumetric stress state in a plane-wave experiment.

Fig. 7. Dependence of the tensile strength of a titanium alloy on the logarithm of the strain rate.

Acknowledgements

The study on dynamic properties using the Kolsky method was carried out under financial support of the Ministry of Science and Higher Education of the Russian Federation (project 0729-2020-0054). The study of spall strength of 3M alloy in plane-wave experiments was supported by a grant from the Government of the Russian Federation (contract No. 14.Y26.31.0031).

References

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