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doi:10.22028/D291-43914
Titel: | On the Migration of a High‐Angle Grain Boundary—Effect of Shear Stress and Energy Jump‐Driving Force on Micro‐Bicrystals |
VerfasserIn: | Velayarce, Jorge Rafael Chen, Xiaolei Berbenni, Stéphane Motz, Christian |
Sprache: | Englisch |
Titel: | Advanced Engineering Materials |
Verlag/Plattform: | Wiley |
Erscheinungsjahr: | 2024 |
Freie Schlagwörter: | disconnections dislocation pile-ups energy jump-driving force fatigue grain boundary migration micro-bicrystal |
DDC-Sachgruppe: | 500 Naturwissenschaften |
Dokumenttyp: | Journalartikel / Zeitschriftenartikel |
Abstract: | Grain boundary (GB) migration plays a crucial role in the microstructural evolution of polycrystalline materials, particularly in fine-grained materials. This migration can be driven by shear forces or by an energy jump across a GB. Interestingly, GB migration processes during cyclic loading deformations have been observed to be fully reversible. This study focuses on understanding the impact and importance of shear driving forces, the free energy difference across a GB, and lattice dislocations on GB migration. These factors are key points for gaining deeper insights into the underlying mechanisms of GB migration. In this work, GB migration in cyclic loading deformations is demonstrated, and it is emphasized that it clearly depends on both the shear driving forces (attributed to the motion of disconnections) and the energy differential across the GB. Two cyclic micro-experimental methods, accompanied by analytical and numerical simulations, have been employed to investigate the role of shear stresses and energy jump-driving forces in GB migration. This investigation provides clear experimental evidence that GB migration, in particular for a high-angle GB, is dependent on both stress and energy driving forces. |
DOI der Erstveröffentlichung: | 10.1002/adem.202400406 |
URL der Erstveröffentlichung: | https://doi.org/10.1002/adem.202400406 |
Link zu diesem Datensatz: | urn:nbn:de:bsz:291--ds-439141 hdl:20.500.11880/39299 http://dx.doi.org/10.22028/D291-43914 |
ISSN: | 1527-2648 1438-1656 |
Datum des Eintrags: | 8-Jan-2025 |
Fakultät: | NT - Naturwissenschaftlich- Technische Fakultät |
Fachrichtung: | NT - Materialwissenschaft und Werkstofftechnik |
Professur: | NT - Prof. Dr. Christian Motz |
Sammlung: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
Dateien zu diesem Datensatz:
Datei | Beschreibung | Größe | Format | |
---|---|---|---|---|
Adv Eng Mater - 2024 - Velayarce - On the Migration of a High‐Angle Grain Boundary Effect of Shear Stress and Energy.pdf | 5,18 MB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons