In situ TEM observation of phase transformation in bulk metallic glass composites

Research output: Contribution to journalArticleResearchpeer-review

Authors

  • Huaping Sheng
  • Long Zhang
  • Haifeng Zhang
  • Jianbo Wang
  • Christoph Gammer

Organisational units

External Organisational units

  • Erich Schmid Institute of Materials Science
  • Shi-Changxu Innovation Center for Advanced Materials
  • School of Physics and Technology
  • Wuhan University

Abstract

Transformation-induced plasticity is a fundamental solution for improving the ductility of bulk metallic glass composites (BMGCs). However, the underlying mechanism remains controversial. Here, by using in situ transmission electron microscopy, we present direct observation of the transformation dynamics from β/ω phase to α’ phase of the crystalline dendrites in a TiZrCuBe BMGC under uniaxial tensile deformation. The transformation redistributes the stress in the adjacent matrix, making interfacial regions potential preferential sites for shear band nucleation. The high density of nucleation sites is believed to promote the formation of shear band networks and enhance the ductility of BMGCs.

Details

Original languageEnglish
Pages (from-to)190-195
Number of pages6
JournalMaterials Research Letters
Volume9.2021
Issue number4
DOIs
Publication statusE-pub ahead of print - 17 Jan 2021