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Effect of cooling rate on the volume fraction of B2 phases in a CuZrAlCo metallic glass matrix composite

Kozachkov, Henry and Kolodziejska, Joanna and Johnson, William L. and Hoffman, Douglas C. (2013) Effect of cooling rate on the volume fraction of B2 phases in a CuZrAlCo metallic glass matrix composite. Intermetallics, 39 . pp. 89-93. ISSN 0966-9795. doi:10.1016/j.intermet.2013.03.017.

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The material properties of bulk metallic glass matrix composites (BMGMCs) depend strongly on the morphology and elastic constants of the included crystalline phase. Transformation induced plasticity (TRIP) BMGMCs based on the Cu–Zr system are alternatives to traditional dendrite-reinforced BMGMCs. Samples of a representative alloy, Zr_(48)Cu_(47.5)Al_4Co_(0.5), are fabricated in various dimensions and characterized using DSC, SEM, and ultrasonic measurement of elastic constants. It is shown that the Cu–Zr system uniquely softens during crystallization, and the microstructure of the alloy depends strongly on the rate of cooling. We conclude by discussing how combinations of part design and alloy development could be used to utilize these alloys in applications.

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Additional Information:© 2013 Elsevier Ltd. Received 31 December 2012. Accepted 25 March 2013. Available online 19 April 2013. This work was supported by the National Aeronautics and Space Administration (NASA), Exploration Systems Mission Directorate, under Contract No. MSFC-NRA10, and the Air Force Office of Scientific Research under grant no. RF01152700/PO60020925. Some graduate student support was provided by the Office of Naval Research, under grant N0000-14-07-1-1115.
Funding AgencyGrant Number
NASA Exploration Systems Mission DirectorateMSFC-NRA10
Air Force Office of Scientific Research (AFOSR)RF01152700/PO60020925
Office of Naval Research (ONR)N0000-14-07-1-1115
Subject Keywords:A. Composites A. Intermetallics B. Elastic properties B. Martensitic transformations B. Shape-memory effects C. Casting
Record Number:CaltechAUTHORS:20130710-084207223
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Official Citation:Henry Kozachkov, Joanna Kolodziejska, William L. Johnson, Douglas C. Hofmann, Effect of cooling rate on the volume fraction of B2 phases in a CuZrAlCo metallic glass matrix composite, Intermetallics, Volume 39, August 2013, Pages 89-93, ISSN 0966-9795, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39277
Deposited By: Ruth Sustaita
Deposited On:10 Jul 2013 16:00
Last Modified:09 Nov 2021 23:43

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