Unravel unusual hardening behavior of a Pd-Ni-P metallic glass in its supercooled liquid region

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Y. H. Cao
  • Q. Du
  • X. J. Liu
  • L. Wang
  • Y. Wu
  • H. Wang
  • S. H. Jiang
  • Z. P. Lu

Detail(s)

Original languageEnglish
Article number121902
Journal / PublicationApplied Physics Letters
Volume118
Issue number12
Publication statusPublished - 22 Mar 2021
Externally publishedYes

Abstract

Monolithic metallic glasses often exhibit work softening induced by high atom mobility in the supercooled liquid region in tension. In this work, we report an unusual viscous flow of the Pd42.5Ni42.5P15 metallic glass in its supercooled liquid region, which is characterized by a remarkable hardening behavior with decent plasticity during tension. To unravel the causes of this unusual hardening, we conducted structural and thermodynamic analyses by employing several experiments, including dynamic mechanical analysis, differential scanning calorimetry, high-resolution transmission electron microscopy, and in situ heating synchrotron high-energy x-ray diffraction. It was found that the unusual hardening behavior was attributed to structural ordering during deformation, rather than nanocrystallization or structural relaxation observed, sometimes, in metallic glasses deformed in supercooled liquid region. We also incorporated an additional work hardening region in the modified deformation map for metallic glasses.

Citation Format(s)

Unravel unusual hardening behavior of a Pd-Ni-P metallic glass in its supercooled liquid region. / Cao, Y. H.; Du, Q.; Liu, X. J.; Wang, L.; Wu, Y.; Wang, H.; Jiang, S. H.; Ren, Y.; Nieh, T. G.; Lu, Z. P.

In: Applied Physics Letters, Vol. 118, No. 12, 121902, 22.03.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review