Nanoindentation creep behavior of Cu–Zr metallic glass films

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

  • Yaqiang Wang
  • Jinyu Zhang
  • Kai Wu
  • Gang Liu
  • Jun Sun

Organisationseinheiten

Externe Organisationseinheiten

  • Xi’an Jiaotong University
  • Erich-Schmid-Institut für Materialwissenschaft der Österreichischen Akademie der Wissenschaften

Abstract

The size-dependent hardness, strain-rate sensitivity (SRS) and shear transformation zone (STZ) volume of co-sputtered Cu–Zr metallic glass films with film thickness h spanning from 1000 to 3000 nm were systematically investigated by nanoindentation creep tests at room temperature. Experimental results manifested an exceptional decrease in hardness and a monotonic increment in SRS (or a monotonic decline in STZ volume) with reducing h. The deformation mechanism could be rationalized in light of more free volume combined with smaller STZs in thinner films, which likely trigger the strain-softening behavior. Moreover, STZs and deformation-induced devitrification promote the homogeneous-like plastic flow.

Details

OriginalspracheEnglisch
Seiten (von - bis)22-28
Seitenumfang7
FachzeitschriftMaterials Research Letters [Elektronische Ressource]
Jahrgang6.2018
Ausgabenummer1
Frühes Online-Datum19 Okt. 2017
DOIs
StatusVeröffentlicht - 2 Jan. 2018