Grown-in twin boundaries affecting deformation mechanisms in nc-metals

Molecular dynamics simulations have recently shown that the presence of grown-in twin boundaries in nc-Al promotes slip activity in the form of twin boundary migration. In this letter we investigate the effect of grown-in twin boundaries on the plastic deformation mechanism in nc-Ni and Cu, and show...

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Veröffentlicht in:Applied physics letters 2004-12, Vol.85 (24), p.5863-5865
Hauptverfasser: Frøseth, A. G., Derlet, P. M., Van Swygenhoven, H.
Format: Artikel
Sprache:eng
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Zusammenfassung:Molecular dynamics simulations have recently shown that the presence of grown-in twin boundaries in nc-Al promotes slip activity in the form of twin boundary migration. In this letter we investigate the effect of grown-in twin boundaries on the plastic deformation mechanism in nc-Ni and Cu, and show that (1) for these particular fcc metals twin boundary migration is not the favored deformation mechanism and (2) that the Schmid factors of the grown-in twin plane play a correspondingly important role. The results are explained in terms of the different ratios of the extrema of the generalized planar fault curves.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1835531