Key factors of deformation mechanism of Cu-Ag alloy

ŞENGÜL S., HÜNER V.

Journal of Non-Crystalline Solids, cilt.576, 2022 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 576
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.jnoncrysol.2021.121270
  • Dergi Adı: Journal of Non-Crystalline Solids
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Cu-Ag alloy, Deformation transition, Embedded atom method, Molecular dynamics simulations, Strength, Tensile deformation, Voronoi tessellation
  • Trakya Üniversitesi Adresli: Evet

Özet

This work focused on the effect of the structural order and dimensionality on the deformation mechanism of Cu-Ag alloy and the triggering factors of this mechanism. It is revealed that (i) the weakness of the system develops from bulk to nanoscale and crystalline to amorphous systems, (ii) Cu-Ag nanowires are more flexible than their bulk counterparts, (iii) crystalline Cu-Ag alloys are stiffer than amorphous systems. The reason for early yielding and less stiffness of amorphous Cu-Ag nanowire with respect to bulk material is the less fraction of ideal icosahedra. Cu atoms are a key factor to characterize the mechanical response of both amorphous Cu-Ag alloys. While there are two different deformation modes in crystalline systems, the only mode observed in the amorphous alloy is homogeneous deformation. The presence of 〈0,5,2,x〉 (x = 5,6) polyhedral is the reason for the transition of deformation from homogeneous to inhomogeneous in the crystalline Cu-Ag alloys.