Grain size effects in the deformation of [0 0 0 1] textured nanocrystalline Zr

CARLOS RUESTES; GRACIELA BERTOLINO; MARGARITA RUDA; DIANA FARKAS; EDUARDO BRINGA

SCRIPTA MATERIALIA

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2014 vol. 71 p. 9 - 12

1359-6462

Molecular dynamics was used to simulate tensile testing of columnar grain samples of nanocrystalline Zr with random rotationsaround the [0 0 0 1] axis. For grain sizes smaller than a critical size the results show an inverse Hall?Petch effect. For larger grains thecalculated Hall?Petch constant agrees well with the experimental data. Grain size effects on deformation mechanisms, includinggrain boundary sliding and dislocation emission, are also discussed.