Investigations of the factors that affected fatigue behavior of Zr-based bulk-metallic glasses

Gongyao Wang, Peter K. Liaw, Yoshihiko Yokoyama, Matthew Freels, Akihisa Inoue

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The four-point-bending-fatigue experiments on the fully-amorphous Zr 50Cu40Al10 and Zr50Cu 30Al10Ni10 were performed. The fracture surfaces were observed and analyzed by the scanning-electron microscopy (SEM), and the effect of the partial crystallization on the fatigue behavior of BMGs was clarified. In addition, other possible factors, as pores and sample geometries, which affect the fatigue behavior, was studied. The ladle-hearth type arc-melt tilt-casting technique was employed to manufacture BMGs, with the advantage to control the molten alloy flow to restrict the formation of cold shuts. The results of the experiment showed the partially-crystallized BMGs exhibited much lower endurance limits and shorter lifetime than the fully amorphous BMGs, as the crystalline BMG could result in the crack initiation easily and accelerate the process of the crack propagation and the sample failure.

Original languageEnglish
Pages (from-to)1030-1033
Number of pages4
JournalAdvanced Engineering Materials
Volume10
Issue number11
DOIs
Publication statusPublished - 2008 Nov 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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