Jin, Z.-H. ; Gumbsch, P. ; Albe, K. ; Ma, E. ; Lu, K. ; Gleiter, H. ; Hahn, H. (2008)
Interactions between non-screw lattice dislocations and coherent twin boundaries in face-centered cubic metals.
In: Acta Mater., 56 (5)
doi: 10.1016/j.actamat.2007.11.020
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In a first report {\}Jin ZH.. Gumbsch P, Ma E, Albe K, Lu K, Hahn H, et al. Scripta Mater 2006;54:1163, interactions between screw dislocation and coherent twin boundary (CTB) were studied via molecular dynamics simulations for three face-centered cubic (fcc) metals, Cu, Ni and Al. To complement those preliminary results, purely stress-driven interactions between 60 degrees non-screw lattice dislocation and CTB are considered in this paper. Depending on the material and the applied strain, slip has been observed to interact with the boundary in different ways. If a 60 degrees dislocation is forced by an external stress into a CTB, it dissociates into different partial dislocations gliding into the twin as well as along the twin boundary. A sessile dislocation lock may be generated at the CTB if the transited slip is incomplete. The details of the interaction are controlled by the material-dependent energy barriers for the formation of Shockley partial dislocations from the site where the lattice dislocation impinges upon the boundary.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2008 |
| Autor(en): | Jin, Z.-H. ; Gumbsch, P. ; Albe, K. ; Ma, E. ; Lu, K. ; Gleiter, H. ; Hahn, H. |
| Art des Eintrags: | Bibliographie |
| Titel: | Interactions between non-screw lattice dislocations and coherent twin boundaries in face-centered cubic metals |
| Sprache: | Englisch |
| Publikationsjahr: | März 2008 |
| Verlag: | Elsevier Science Publishing Company |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Mater. |
| Jahrgang/Volume einer Zeitschrift: | 56 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1016/j.actamat.2007.11.020 |
| URL / URN: | http://www.sciencedirect.com/science/article/pii/S1359645407... |
| Kurzbeschreibung (Abstract): | In a first report {\}Jin ZH.. Gumbsch P, Ma E, Albe K, Lu K, Hahn H, et al. Scripta Mater 2006;54:1163, interactions between screw dislocation and coherent twin boundary (CTB) were studied via molecular dynamics simulations for three face-centered cubic (fcc) metals, Cu, Ni and Al. To complement those preliminary results, purely stress-driven interactions between 60 degrees non-screw lattice dislocation and CTB are considered in this paper. Depending on the material and the applied strain, slip has been observed to interact with the boundary in different ways. If a 60 degrees dislocation is forced by an external stress into a CTB, it dissociates into different partial dislocations gliding into the twin as well as along the twin boundary. A sessile dislocation lock may be generated at the CTB if the transited slip is incomplete. The details of the interaction are controlled by the material-dependent energy barriers for the formation of Shockley partial dislocations from the site where the lattice dislocation impinges upon the boundary. |
| Freie Schlagworte: | Dislocation, Slip, Twinning, Twin grain boundary, Molecular dynamics |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien |
| Hinterlegungsdatum: | 28 Feb 2012 14:55 |
| Letzte Änderung: | 03 Dez 2018 15:11 |
| PPN: | |
| Sponsoren: | This research was supported by the Deutsche Forschungsgemeinschaft (DFG) and Forschungszentrum Karlsruhe (FZK). |
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