Effect of Ni addition on fatigue properties of bulk glassy Zr 50Cu40Al10 alloys

Yoshihiko Yokoyama, Kenzo Fukaura, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

We examined Wöhler curves of Zr50Cu40Al 10 and Zr50Cu30Ni10Al10 bulk glassy alloys (BGAs) using a rotating-beam fatigue test to evaluate the effect of addition Ni on fatigue strength. As a result, we found that the fatigue limit was increased from 250 MPa to 500 MPa by adding 10 at% Ni instead of Cu to a Zr50Cu40Al10 BGA. Zr 50Cu40Al10 BGAs exhibit wider fatigue-fractured region with striation-like marks than that of Zr50Cu 30Ni10Al10 BGAs. Additive Ni element limits the fatigue-fractured region to half of the whole fractured surface. We also measured dimensions of fatigue-fracture area of Zr50Cu 40Al10 and Zr50Cu30Ni 10Al10 BGAs to estimate the value of fatigue-fracture toughness. Especially, the fatigue fracture toughness decreases suddenly around 105-̃104 cycles, similar to the Wöhler curves. The significant decrease of fatigue-fracture toughness originates from embrittlement/hardening in front of the fatigue crack tip during fatigue test.

Original languageEnglish
Pages (from-to)1672-1678
Number of pages7
JournalMaterials Transactions
Volume45
Issue number5
DOIs
Publication statusPublished - 2004 May

Keywords

  • Fatigue limit
  • French's damage curve
  • Striation-like mark
  • Surface oxidization
  • Wöhler curve
  • ZrCuAl and ZrCu NiAl Bgas

ASJC Scopus subject areas

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

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