Influence of grain boundaries on the radiation-induced defects and hydrogen in nanostructured and coarse-grained tungsten - Valles, G.; Panizo-Laiz, M.; Gonzalez, C.; Martin-Bragado, I.; Gonzalez-Arrabal, R.; Gordillo, N.; Iglesias, R.; Guerrero, C. L.; Perlado, J. M.; Rivera, A.; (Acta Materialia, 2017)