Figure 9 | Scientific Reports

Figure 9

From: Elucidating the dual role of grain boundaries as dislocation sources and obstacles and its impact on toughness and brittle-to-ductile transition

Figure 9

First definition of the BDT temperature. If \({K}_{eff}\) does not reach \({K}_{IC}\) for any \({K}_{app}\), the material behaviour is ductile, otherwise it is brittle. Furthermore, the slope of the curve representing the critical stress intensity, \({K}_{IC}\) to \({K}_{app}\), increases with increasing temperature. This clearly indicates that an increase in test temperature results in an increased blunting activity. Note: In Supplementary Figure 3, we plotted the number and position of the dislocations at the end of the experiments performed in this study.

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