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Changes in mechanical properties of Zr-based bulk metallic glass under linear heating and cooling
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic diagram of the ultrasonic measuring system.

Image of FIG. 2.
FIG. 2.

DSC curve of the sample obtained during heating with a heating rate of . The dashed lines are tangent to the curve, the intersection of which determines the calorimetric and .

Image of FIG. 3.
FIG. 3.

XRD patterns of the sample (a) before heating and (d) after the fifth run.

Image of FIG. 4.
FIG. 4.

Densities of the sample before and after the heating cycles.

Image of FIG. 5.
FIG. 5.

Changes in sound velocities during the first run with a heating and cooling rate of . The upper plot is for longitudinal wave velocity ;, the lower one is for transverse wave velocity .

Image of FIG. 6.
FIG. 6.

(Color) Poisson’s ratios vs temperature during the measurement runs.

Image of FIG. 7.
FIG. 7.

Young’s moduli vs temperature during the heating cycle from the (a) first run to (e) fifth run.

Image of FIG. 8.
FIG. 8.

Compilation of the data indicated in Fig. 7 as relationship between Young’s modulus at and the run number.

Image of FIG. 9.
FIG. 9.

Micro-Vickers hardness as a function of run number.

Image of FIG. 10.
FIG. 10.

(Color) Dilational and transverse internal frictions vs temperature during linear heating and cooling at a rate of .

Image of FIG. 11.
FIG. 11.

Relationship between the onset transition temperature of structural change and the run number during the heating process.

Image of FIG. 12.
FIG. 12.

Schematic illustration of the free volume based on (a) the assumptions and (b) the simplified kinetic model for deformation.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Changes in mechanical properties of Zr-based bulk metallic glass under linear heating and cooling