Cryogenic-temperature-induced structural transformation of a metallic glass

Research output: Contribution to journalArticleResearchpeer-review

Authors

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

Organisational units

External Organisational units

  • Shanghai University, School of Materials Science and Engineering, Institute of Materials
  • University of Hong Kong
  • Leibniz Institute for Solid State and Materials Research, Dresden
  • Photon Science, Deutsches Elektronen-Synchrotron DESY, Hamburg,
  • Erich Schmid Institute of Materials Science

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

Original languageEnglish
Pages (from-to)284-291
Number of pages8
JournalMaterials Research Letters [Elektronische Ressource]
Volume5.2017
Issue number4
DOIs
Publication statusE-pub ahead of print - 30 Nov 2016