Structural heterogeneity originated plasticity in Zr–Cu–Al bulk metallic glasses

Tuo Wang, Xu Ma, Yinghong Chen, Jichao Qiao, Lei Xie, Qiang Li

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The brittleness at room temperature has become the major issue for bulk metallic glasses (BMGs) as structural engineering materials and a significant challenge is to improve and research the plasticity. Study on structural heterogeneity may be a key to understand the origin of plasticity in BMGs. In the current research, correlation of plasticity with structural heterogeneity which is studied by β-relaxation, fragility, serration dynamics, and free volume has been studied in a Zr–Cu–Al BMGs system. These quantities are unified with each other. It has evidenced that the degree of β-relaxation behavior has a close correlation with the plasticity and fragility. A good plastic deformation in BMG has a more heterogeneous serrations with a higher serration barrier. Compared with a poor plasticity BMG, the ductile has a more heterogeneous structure with more free volume. All of these can owe to the structural heterogeneity originated plasticity. This finding is believed to have implications for understanding the origin of plasticity from the perspective of structural heterogeneity in BMGs.

Original languageEnglish
Article number106790
JournalIntermetallics
Volume121
DOIs
StatePublished - Jun 2020

Keywords

  • Bulk metallic glasses
  • Plasticity
  • Structural heterogeneity
  • β-relaxation

Fingerprint

Dive into the research topics of 'Structural heterogeneity originated plasticity in Zr–Cu–Al bulk metallic glasses'. Together they form a unique fingerprint.

Cite this