MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Mechanical Behavior of Au-Based Metallic Glass in Micro-Scale at Ambient and Elevated Temperatures
C. J. LeeY. H. LaiC. W. TangJ. C. HuangJ. S. C. Jang
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2009 Volume 50 Issue 12 Pages 2795-2800

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Abstract

The Au based amorphous micro-pillars are fabricated by using focus ion beam (FIB) and tested in micro-compression at ambient and elevated temperatures from 300 to 408 K. The room temperature strength of current micro-pillars could reach to 1600–2000 MPa, much higher than the measured strengths for the 3 mm bulk compression specimen. The stress increment can be rationalized by the Weibull statistics. The current Au based micro-pillars maintain inhomogeneous deformation with one (at most two) principal shear band from 300 up to 393 K. At or above Tg (403 and 408 K), the micro-pillars are deformed in a homogeneous manner without the trace of any shear band. For micro-forming, it should be born in mind that there would be apparent stress increment while forming micro- or nano-scaled patterns and pieces.

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© 2009 The Japan Institute of Metals and Materials
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