Malleable hypoeutectic Zr-Ni-Cu-Al bulk glassy alloys with tensile plastic elongation at room temperature

A new bulk glassy alloy (BGA) showing macroscopic tensile plastic elongation at room temperature has been developed in the hypoeutectic Zr-Ni-Cu-Al alloy system. The hypoeutectic Zr-Ni-Cu-Al BGA shows a high Poisson's ratio, a low Young's modulus, and is highly malleable in compression. It...

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Bibliographic Details
Published in:Philosophical magazine letters 2009-05, Vol.89 (5), p.322-334
Main Authors: Yokoyama, Y., Fujita, K., Yavari, A.R., Inoue, A.
Format: Article
Language:English
Subjects:
Alloys
Atoms & subatomic particles
Chemical Sciences
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Disordered solids
Engineering Sciences
Exact sciences and technology
Glasses
Glasses (including metallic glasses)
Material chemistry
Materials
Materials science
metallic glasses
Physics
Plastics
Poisson distribution
Specific materials
Structure of solids and liquids
crystallography
Temperature
tensile testing
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Summary:A new bulk glassy alloy (BGA) showing macroscopic tensile plastic elongation at room temperature has been developed in the hypoeutectic Zr-Ni-Cu-Al alloy system. The hypoeutectic Zr-Ni-Cu-Al BGA shows a high Poisson's ratio, a low Young's modulus, and is highly malleable in compression. It exhibits a Poisson's ratio of 0.39, a Young's modulus of 73 GPa, and a distinct tensile plastic elongation of about 1.7% at room temperature with necking due to the operation of many shear bands. The tensile plastic deformability seems to originate from modifications of the glass structure with increasing the number of Zr-Zr atomic pairs in the hypoeutectic composition.
ISSN:0950-0839
1362-3036
DOI:10.1080/09500830902873575