Cryogenic-temperature-induced structural transformation of a metallic glass

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

Autoren

  • Xilei Bian
  • Gang Wang
  • Quing Wang
  • Baoan Sun
  • Ishtiaq Hussain
  • Qijie Zhai
  • Norbert Mattern
  • Jozef Bednarčík

Organisationseinheiten

Externe Organisationseinheiten

  • Shanghai University
  • University of Hong Kong
  • IFW Dresden
  • Deutsches Elektronen-Synchrotron DESY
  • Erich-Schmid-Institut für Materialwissenschaft der Österreichischen Akademie der Wissenschaften

Abstract

The plasticity of metallic glasses depends largely on the atomic-scale structure. However, the details of the atomic-scale structure, which are responsible for their properties, remain to be clarified. In this study, in-situ high-energy synchrotron X-ray diffraction and strain-rate jump compression tests at different cryogenic temperatures were carried out. We show that the activation volume of flow units linearly depends on temperature in the non-serrated flow regime. A plausible atomic deformation mechanism is proposed, considering that the activated flow units mediating the plastic flow originate from the medium-range order and transit to the short-range order with decreasing temperature.

Details

OriginalspracheEnglisch
Seiten (von - bis)284-291
Seitenumfang8
FachzeitschriftMaterials Research Letters [Elektronische Ressource]
Jahrgang5.2017
Ausgabenummer4
DOIs
StatusElektronische Veröffentlichung vor Drucklegung. - 30 Nov. 2016