• English
    • Latviešu
    • Deutsch
    • русский
  • Help
  • Deutsch 
    • English
    • Latviešu
    • Deutsch
    • русский
  • Einloggen
Dokumentanzeige 
  •   DSpace Startseite
  • B6 – LU institūti un aģentūras / Institutes and agencies of the UL
  • Cietvielu fizikas institūts / Institute of Solid State Physics
  • Zinātniskie raksti (CFI) / Scientific articles
  • Dokumentanzeige
  •   DSpace Startseite
  • B6 – LU institūti un aģentūras / Institutes and agencies of the UL
  • Cietvielu fizikas institūts / Institute of Solid State Physics
  • Zinātniskie raksti (CFI) / Scientific articles
  • Dokumentanzeige
JavaScript is disabled for your browser. Some features of this site may not work without it.

Abrupt elastic-to-plastic transition in pentagonal nanowires under bending

Thumbnail
Öffnen
2190-4286-10-237.pdf (4.176Mb)
Autor
Vlassov, Sergei
Mets, Magnus
Polyakov, Boris
Bian, Jianjun
Dorogin, Leonid
Zadin, Vahur
Datum
2019
Metadata
Zur Langanzeige
Zusammenfassung
In this study, pentagonal Ag and Au nanowires (NWs) were bent in cantilever beam configuration inside a scanning electron microscope. We demonstrated an unusual, abrupt elastic-to-plastic transition, observed as a sudden change of the NW profile from smooth arc-shaped to angled knee-like during the bending in the narrow range of bending angles. In contrast to the behavior of NWs in the tensile and three-point bending tests, where extensive elastic deformation was followed by brittle fracture, in our case, after the abrupt plastic event, the NW was still far from fracture and enabled further bending without breaking. A possible explanation is that the five-fold twinned structure prevents propagation of critical defects, leading to dislocation pile up that may lead to sudden stress release, which is observed as an abrupt plastic event. Moreover, we found that if the NWs are coated with alumina, the abrupt plastic event is not observed and the NWs can withstand severe deformation in the elastic regime without fracture. The coating may possibly prevent formation of dislocations. Mechanical durability under high and inhomogeneous strain fields is an important aspect of exploiting Ag and Au NWs in applications like waveguiding or conductive networks in flexible polymer composite materials.
URI
https://dspace.lu.lv/dspace/handle/7/52398
DOI
10.3762/bjnano.10.237
Collections
  • Zinātniskie raksti (CFI) / Scientific articles [604]

University of Latvia
Kontakt | Feedback abschicken
Theme by 
@mire NV
 

 

Stöbern

Gesamter BestandBereiche & SammlungenErscheinungsdatumAutorenTitelnSchlagwortenDiese SammlungErscheinungsdatumAutorenTitelnSchlagworten

Mein Benutzerkonto

Einloggen

Statistik

Benutzungsstatistik

University of Latvia
Kontakt | Feedback abschicken
Theme by 
@mire NV