Abstract
The temperature increase at the tip of a dynamically propagating crack may have a significant effect on a material's mechanical properties, and hence on its dynamic fracture toughness. In order to start to understand this phenomena, measurements of the temperature field at the tip of a dynamically growing crack in Beta-C titanium alloy were performed using a linear array of high speed infrared detectors. The results show that a maximum temperature of 450°C is reached at the crack tip. In addition, the dynamic fracture toughness was measured for crack speeds from 0 to 500 m/s. In this speed range, the toughness appears to be constant. Estimates of the crack tip energy release rate and plastic strain rate are made using analysis of the experimental data.
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Kallivayalil, J.A., Zehnder, A.T. Measurement of the temperature field induced by dynamic crack growth in Beta-C titanium. Int J Fract 66, 99–120 (1994). https://doi.org/10.1007/BF00020077
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DOI: https://doi.org/10.1007/BF00020077