The Production and Elevated Temperature Properties of Ca₆₅Mg₁₅Zn₂₀ Bulk Metallic Glass

Abstract:

Ca65Mg15Zn20 bulk metallic glass samples of dimensions 3.15 × 7 × 125 mm were prepared using an inverted low-pressure die-casting technique. It was found that charge temperature, and injection pressure were important parameters for controlling the length, porosity and degree of crystallinity in the as-cast samples. A processing map was generated illustrating the optimum casting temperature and pressure range for generating the highest quality castings. These samples were ground into tensile samples in compliance with ASTM E8-04 and deformed in the supercooled liquid (SCL) region (105 to 135 °C) at constant strain rates from 10-3 to 10-4 s-1. Reported are the effects of these parameters on the deformation behaviour of the Ca65Mg15Zn20 BMG.

• Periodical: Materials Science Forum (Volumes 561-565)
• Pages: 1263-1266
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.561-565.1263
• Online since: October 2007
• Authors: Kevin J. Laws, B. Gun, Michael Ferry
• Keywords: Bulk Metallic Glass (BMG), Die Casting, Dynamic Stabilization, Tensile Testing, Viscous Flow

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