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Processing Path and The Evolution of Crystallinity in Rapidly Solidified Glassy Alloys

Published online by Cambridge University Press:  15 February 2011

M. A. Otooni
M. A. Otooni*
Affiliation:
US Army Armament Research, Development and Engineering Center, Picatinny Arsenal, NJ, 07806-5000.
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Abstract

Atomic transport properties in rapidly solidified glassy alloys are not fully understood in spite of much experimental data on the subject. Nevertheless, a thorough understanding of these properties is of fundamental importance when studying the practical limits of the application of rapidly solidified glassy alloys.

Several attempts are made in this paper to explain our experimental results on the mechanical flow properties near the transition temperature, Tr. These results are interpreted in the context of possible operating mechanisms such as diffusion and/or relaxation processes. Some inferences have been made on the nature of viscosity and its fluctuation near the transition temperature. The linear temperature dependence of the viscosity near the transition temperature is explained by invoking the free-volume concept for the viscosity of the glassy alloys.

These results are used to provide appropriate data for the selection of feasible processing paths which will produce alloys with advanced thermomechanical properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 362: Symposium J – Grain-Size and Mechanical Properties--Fundamentals and Applications , 1994 , 101
Copyright
Copyright © Materials Research Society 1995

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