PSI - Issue 28

Ezio Cadoni et al. / Procedia Structural Integrity 28 (2020) 964–970 Author name / Structural Integrity Procedia 00 (2020) 000–000

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Fig. 4. Photos of specimen during dynamic tests (43’000 fps).

Fig. 5. Stress versus strain representative curve at di ff erent strain-rate.

where D and q are the material coe ffi cients experimentally determined. The evaluated coe ffi cients for this tungsten alloy are D = 3458 s − 1 and q = 1.4637. Figure 7 shows the comparison between the calibrated Cowper-Symonds consti tutive model and the experimental results. The commercial tungsten alloy analysed showed positive strain-rate sensitivity at room temperature. The next steps will be addressed to investigate the response to combined conditions of elevated temperature, strain-rate and at di ff erent triaxialities.

References

Arsecularatne, J.A., Zhang, L.C., Montross C., 2006.Wear and tool life of tungsten carbide, PCBN and PCD cutting tools, International Journal of Machine Tools & Manufacture 46, 482–491 Gupta, A., Chattopadhyaya, S., Hloch, S., 2013. Critical Investigation of Wear Behaviour of WC Drill Bit Buttons. Rock Mechanics and Rock Engineering 46, 169-177.