Crystallization and nanoindentation behavior of a bulk Zr–Al–Ti–Cu–Ni amorphous alloy

The crystallization and nanoindentation behavior of a Zr–10Al–5Ti–17.9Cu–14.6Ni (at.%) bulk amorphous alloy (BAA) were studied. Resulting from the kinetic nature of phase transformation in multicomponent alloys, the crystallization path is complex. Despite the complexity of different crystallization...

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Bibliographic Details
Published in:Journal of materials research 2000-03, Vol.15 (3), p.798-807
Main Authors: Wang, J. G., Choi, B. W., Nieh, T. G., Liu, C. T.
Format: Article
Language:English
Subjects:
ALUMINIUM ALLOYS
ANNEALING
COPPER ALLOYS
CRYSTALLIZATION
EXPERIMENTAL DATA
MATERIALS SCIENCE
MECHANICAL PROPERTIES
METALLIC GLASSES
MICROSTRUCTURE
NICKEL ALLOYS
TITANIUM ALLOYS
ZIRCONIUM ALLOYS
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Summary:The crystallization and nanoindentation behavior of a Zr–10Al–5Ti–17.9Cu–14.6Ni (at.%) bulk amorphous alloy (BAA) were studied. Resulting from the kinetic nature of phase transformation in multicomponent alloys, the crystallization path is complex. Despite the complexity of different crystallization paths, the main final crystallized product in the Zr-based BAA is Zr2Cu. Young's modulus and hardness of the BAA were found to increase with an increase in annealing temperature. The observed mechanical properties were correlated with the microstructure of the material. Also, in the present paper, both the observed crystallization and nanoindentation behavior are compared with existing data. Zr-based BAAs exhibit a ratio of hardness to Young's modulus (H/E ratio) of about 1/10, suggesting the interatomic bonding in the alloys is close to being covalent.
ISSN:0884-2914
2044-5326
DOI:10.1557/JMR.2000.0114