Dynamic fracture of berylium-bearing bulk metallic glass systems: A cross-technique comparison
نویسنده
چکیده
We report on a detailed comparison between two different experimental techniques used to measure the dynamic initiation fracture toughness KdIC of a bulk metallic glass system (Vitreloy-1) and its b-phase composite. Both the coherent gradient sensing interferometry (CGS) and one-point impact techniques reveal very similar trends in the KdIC– _ K d I relationship for Vitreloy-1. A drastic increase in initiation toughness with the stress intensity rate is observed. By contrast, the one-point impact method shows a relative rate-insensitivity for the KdIC of the b-phase composite. The results are rationalized through a detailed characterization of the failure mechanisms. 2005 Elsevier Ltd. All rights reserved.
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تاریخ انتشار 2005