4-7

Fig.4-7 (a) Ideal work of interfacial-separation in terms of site occupation (12.5 %–100 %). (b) Fracture-toughness relationships between experiments and simulations

We investigated the effect of alloying elements on the toughness with respect to the occupation. The negative and positive values correspond to weakening and strengthening effect, respectively. The calculated values are in good agreement with the experimental ones. Thus, we can predict the potential candidate for alloying elements which improve the toughness.

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