Notch toughness of Cu-based bulk metallic glasses

We have measured the notch toughness for a range of Cu-based bulk metallic glasses (BMGs). Alloying additions that enhance the glass-forming ability (GFA) are found to degrade the toughness. Within this particular family of Cu-BMGs, toughness is more directly correlated with strength (and consequent...

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Bibliographic Details
Published in:Scripta materialia 2009-07, Vol.61 (2), p.137-140
Main Authors: Jia, Peng, Zhu, Zhen-dong, Ma, Evan, Xu, Jian
Format: Article
Language:English
Subjects:
Cu alloys
Elastic property
Metallic glasses
Toughness
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Summary:We have measured the notch toughness for a range of Cu-based bulk metallic glasses (BMGs). Alloying additions that enhance the glass-forming ability (GFA) are found to degrade the toughness. Within this particular family of Cu-BMGs, toughness is more directly correlated with strength (and consequently with the shear modulus or glass transition temperature) than with the Poisson’s ratio. The Cu 49Hf 42Al 9 BMG exhibits the best combination of GFA and toughness.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2009.03.024