Paper Title:
Mechanical Spectroscopy Study on Cu53.5Zr42Al4.5 Alloy
  Abstract

This study consists of the characterization of the anelastic properties of a Bulk Metallic Glasses (BMG) by mechanical spectroscopy, which can be defined as an energy absorption technique. The equipment used was the acoustic elastometer system, the anelastic relaxation spectra were carried out with a heating rate of 1 K/min and vacuum better than 10-5 torr, in the temperature range of 300 K to 640 K. The amorphous sample studied, with nominal composition of Cu53.5Zr42Al4.5, was processed by skull push-pull casting technique in a rectangular cavity cooper mould. Differential scanning calorimeter (DSC) curves have evidenced the amorphous structure although the X-ray diffraction (XDR) pattern has indicated a heterogeneous microstructure with amorphous matrix and some metaestable nanocrystalline phases which have not been identified yet. The dynamical elastic modulus of this alloy (between 54 GPa and 58 GPa at room temperature) and internal friction patterns as temperature function implied an increase of the crystalline phase during the measurements. This effect was confirmed with new X-ray diffraction measurements after the internal friction experiments.

  Info
Periodical
Defect and Diffusion Forum (Volumes 312-315)
Edited by
Andreas Öchsner, Graeme E. Murch and João M.P.Q. Delgado
Pages
1233-1237
DOI
10.4028/www.scientific.net/DDF.312-315.1233
Citation
O. Florêncio, P. S. Silva, F. H. De Sá, P. W. B. Marques, J. A. Muñoz Chaves, M. Martins Garcia, L. C. Rodriguez Aliaga, W. J. Botta, "Mechanical Spectroscopy Study on Cu53.5Zr42Al4.5 Alloy", Defect and Diffusion Forum, Vols. 312-315, pp. 1233-1237, 2011
Online since
April 2011
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$32.00
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