The simulated nanocrystalline exhibited a breakdown in the HallePetch relation with mean grain size varying from nm to nm. Moreover, the elastic modulus of U1-yThyO2 solid solutions with different content of thorium at 300 K was also studied and the results accorded well with the experimental data available in the literature. In addition, the fracture mode of nanocrystalline was inclined to be ductile because the fracture behavior was preceded by some moderate amount of plastic deformation, which is different from what has been seen earlier in simulations of pure UO2. | Atomistic simulations of nanocrystalline solid solution under uniaxial tension
