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Deformation behavior of strip-cast bulk amorphous matrix composites containing various crystalline particles

Title
Deformation behavior of strip-cast bulk amorphous matrix composites containing various crystalline particles
Authors
Lee, JGKim, HSLee, SKim, NJ
POSTECH Authors
Kim, HSLee, SKim, NJ
Date Issued
Mar-2007
Publisher
Elsevier
Abstract
In this study, effects of various crystalline particles formed in strip-cast Zr-base amorphous matrix composites on deformation behavior were investigated. The compressive and fracture toughness test results indicated that the ductility of the strip-cast alloys containing hard/brittle crystalline particles as well as containing ductile beta-phase particles was higher than that of the monolithic amorphous alloy. From finite element calculations and in situ microfracture observations, this ductility improvement could be explained by the role of the particles to initiate shear bands and to block the shear band propagation. However, this improvement could be obtained only when the size and volume fraction of crystalline particles and characteristics of amorphous matrix were optimized by controlling the strip casting conditions. (c) 2006 Elsevier B.V. All rights reserved.
Keywords
bulk amorphous matrix composite; twin-roll strip casting; shear band; ductility; METALLIC-GLASS; MECHANICAL-PROPERTIES; ALLOYS; FABRICATION; EMBRITTLEMENT; TEMPERATURE; PLASTICITY; DESIGN
URI
http://oasis.postech.ac.kr/handle/2014.oak/26051
DOI
10.1016/J.MSEA.2006.02.296
ISSN
0921-5093
Article Type
Article
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 449, page. 176 - 180, 2007-03
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 LEE, SUNG HAK
Dept of Materials Science & Enginrg
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