Table of Contents
Metals, Volume 9, Issue 6 (June 2019)
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Cover Story (view full-size image) The individual solute atoms of Re and W are introduced in matrix channels of Ni-base single [...] Read more. The individual solute atoms of Re and W are introduced in matrix channels of Ni-base single crystal superalloys to investigate the influence of excess volumes on dislocation motion and creep in a 3D discrete dislocation dynamics study. The accurate excess volumes are calculated by density functional theory. The excess volume affects dislocation glide more strongly than dislocation climb. The relative position of dislocations and solute atoms determines the magnitude of back stresses on dislocation motion. W with a larger excess volume has a stronger strengthening effect than Re. With increasing concentration of solute atoms, the creep resistance increases. View this paper.