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Recovery of structural relaxation in aged metallic glass as determined by high-precision in situ shear modulus measurements
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10.1063/1.3154024
/content/aip/journal/jap/105/12/10.1063/1.3154024
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/12/10.1063/1.3154024
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Temperature dependencies of the shear modulus of the same sample of bulk glassy sample in the initial state, after full relaxation and subsequent fast quenching from the supercooled liquid state measured at a heating rate of (only a part of actually measured data points is shown). The arrow gives the calorimetric glass transition temperature determined at the same heating rate. It is seen that SR increases the shear modulus, while fast quenching from the supercooled liquid state recovers the shear modulus relaxation. Moreover, the absolute starting value (at room temperature) of the shear modulus of aged sample after quenching is notably lower than that in the initial state, as shown in the inset.

Image of FIG. 2.
FIG. 2.

The activation energy spectra of SR reconstructed from shear modulus relaxation using Eq. (1) for the same sample [the corresponding curves are shown in Fig. 1] in the initial state and after aging ( up at 5 K/min into the supercooled liquid region) followed by fast quenching (210 K/s) from indicated temperatures. It is seen that fast quenching recovers the AES and, besides that, creates low-energy defect states, which are absent in the initial state and provide a decrease in the shear modulus below its value in the initial state (as shown in the inset of Fig. 1).

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/content/aip/journal/jap/105/12/10.1063/1.3154024
2009-06-24
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Recovery of structural relaxation in aged metallic glass as determined by high-precision in situ shear modulus measurements
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/12/10.1063/1.3154024
10.1063/1.3154024
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