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HomeKey Engineering MaterialsKey Engineering Materials Vol. 442Processing, Characterization and Properties of...

Processing, Characterization and Properties of Specially Constituted Zr-Based Bulk Amorphous Alloys

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Abstract:

Bulk metallic glasses (BMGs) are an emerging class of materials. The amorphous alloys have very attractive properties. There is potential for applications. The quaternary and pentanery (ZrCuAlNi)100-xTix (x = 0, 2 and 5 at. %) alloys were synthesized by melting 2-3N pure metals in an arc furnace. Amorphous ingots were produced using Cu mold casting technique. The alloys showed wide supercooled liquid region Tx, high thermal stability and good glass-forming ability (GFA). Many thermal parameters like Trg, , , β and  were measured employing high temperature differential scanning calorimetry (DSC). Structural characterization was carried out by X-ray diffraction (XRD) technique. Microstructural characterization was conducted using high resolution field emission scanning electron microscopy (FESEM) and elemental analysis was done using energy dispersive spectroscopy (EDS). Crystallization behavior and phase formation was studied. Activation energy for crystallization was calculated using Kissinger and Ozawa equations. The alloys show double stage crystallization. Mechanical properties were measured. Compression test was carried out and fracture strength and strain were determined. The fracture behavior was studied which showed veins like patterns, shear bands formation and liquid droplets.

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Advanced Materials XI

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Periodical:

Key Engineering Materials (Volume 442)

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41-51

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https://doi.org/10.4028/www.scientific.net/KEM.442.41

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Online since:

June 2010

Authors:

Muhammad Iqbal, J.I. Akhter

Keywords:

Activation Energy, Bulk Amorphous Alloys, Glass-Forming Ability, Liquid Droplet, Mechanical Property, Precipitation, Thermal Property, Veins Pattern, Zr-Ni-Al-Cu Bulk Metallic Glass

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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