Microstructure in a Ni60Pd20P17B3 bulk metallic glass compressively fractured at cryogenic temperature

Asahi Kawashima, Yuqiao Zeng, Guoqiang Xie, Nobuyuki Nishiyama, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In order to clarify relationship between plasticity and microstructure for a Ni60Pd20P17B3 bulk metallic glass (BMG) at cryogenic temperature, we investigated the microstructures of both the shear band and fracture surface for the BMG compressively fractured at room temperature (RT) and 77K (liquid Nitrogen temperature) using transmission electron microscopy (TEM). HRTEM images from the BMG fractured at 77K clearly reveal that there are nanocrystalline particles around both shear band and fracture surface, but not in undeformed region. The sizes of the particles fractured at 77K are smaller than those fractured at RT. These particles ranged from 3 to 5nm in size are thought to consist of an fcc palladium-nickel solid solution phase. The particles with smaller size and the ductile fcc phase may effectively restrain the propagation of shear bands, resulting in enhancement of plastic deformation at cryogenic temperature.

Original languageEnglish
Pages (from-to)391-396
Number of pages6
JournalMaterials Science and Engineering A
Volume528
Issue number1
DOIs
Publication statusPublished - 2010 Nov 25

Keywords

  • Bulk metallic glass
  • Cryogenic temperature
  • Deformation-induced crystallization
  • Microstructure
  • Shear band

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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