Effect of quasicrystalline phase on the deformation behavior of Zr62Al9.5Ni9.5Cu14 Nb5 bulk metallic glass

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

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Author(s)

  • Y. F. Sun
  • T. L. Cheung
  • Y. R. Wang
  • W. H. Li
  • B. C. Wei

Detail(s)

Original languageEnglish
Pages (from-to)22-27
Journal / PublicationMaterials Science and Engineering A
Volume398
Issue number1-2
Publication statusPublished - 25 May 2005

Abstract

Quasicrystalline phase with different volume fraction were formed by isothermally annealing the as-cast Zr62Al9.5 Ni9.5Cu14Nb5 bulk metallic glass at 723 K for different times. The effects of quasicrystals on the deformation behavior of the materials were studied by nanoindentation and compression test. It revealed that the alloys with homogeneous amorphous structure exhibit pronounced flow serrations during the nanoindentation loading, while no obvious flow serration is observed for the sample with quasicrystals more than 10 vol.%. However, further compression tests confirm that the no-serrated flows are formed due to different reasons. For annealed samples containing quasicrystals less than 35 vol.%, continuous plastic deformation occurs due to propagation of multiple shear bands. While the disappearance of serrated flow cannot be explained by the generation of multiple shear bands for samples containing quasicrystals more than 35 vol.%, which will fracture with a totally different fracture mode, namely, dimple fracture mode under loading instead of shear fracture mode. © 2005 Published by Elsevier B.V.

Research Area(s)

  • Bulk metallic glass, Nanoindentation, Quasicrystalline particles, Serrated flow

Citation Format(s)

Effect of quasicrystalline phase on the deformation behavior of Zr62Al9.5Ni9.5Cu14 Nb5 bulk metallic glass. / Sun, Y. F.; Cheung, T. L.; Wang, Y. R.; Shek, C. H.; Li, W. H.; Wei, B. C.

In: Materials Science and Engineering A, Vol. 398, No. 1-2, 25.05.2005, p. 22-27.

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