Fatigue pre-cracking and toughness of the Zr55Cu30Al10Ni5 bulk metallic glass for two oxygen levels

V. Keryvin; Y. Nadot; Y. Yokoyama

doi:10.1016/j.scriptamat.2007.03.042

Fatigue pre-cracking and toughness of the Zr₅₅Cu₃₀Al₁₀Ni₅ bulk metallic glass for two oxygen levels

V. Keryvin, Y. Nadot, Y. Yokoyama

Institute for Materials Research (IMR)

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

Samples of a Zr-based bulk metallic glass with a small (1000 appm) or very small (less than 300 appm) oxygen content are pre-cracked by fatigue and tested for toughness evaluation. It is shown that oxygen trapped in oxide dendrites eases the initiation of a straight crack and embrittles the glass even at such low concentrations. In contrast, when oxygen is dissolved in the glass, fatigue crack initiation becomes difficult and it is not possible to get a crack passing straight through the glass.

Original language	English
Pages (from-to)	145-148
Number of pages	4
Journal	Scripta Materialia
Volume	57
Issue number	2
DOIs	https://doi.org/10.1016/j.scriptamat.2007.03.042
Publication status	Published - 2007 Jul 1

Keywords

Embrittlement
Metallic glasses
Oxygen
Residual stresses
Toughness

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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AB - Samples of a Zr-based bulk metallic glass with a small (1000 appm) or very small (less than 300 appm) oxygen content are pre-cracked by fatigue and tested for toughness evaluation. It is shown that oxygen trapped in oxide dendrites eases the initiation of a straight crack and embrittles the glass even at such low concentrations. In contrast, when oxygen is dissolved in the glass, fatigue crack initiation becomes difficult and it is not possible to get a crack passing straight through the glass.

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KW - Residual stresses

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