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Direct observation of microfracture process in metallic-continuous-fiber-reinforced amorphous matrix composites fabricated by liquid pressing process SCIE SCOPUS

Title
Direct observation of microfracture process in metallic-continuous-fiber-reinforced amorphous matrix composites fabricated by liquid pressing process
Authors
Lee, KSon, CYLee, SBLee, SKLee, S
Date Issued
2010-02-15
Publisher
ELSEVIER SCIENCE SA
Abstract
Zr-based amorphous matrix composites reinforced with metallic continuous fibers were fabricated by liquid pressing process, and their fracture property improvement was explained by directly observing microfracture processes. About 60 vol% of metallic fibers were homogeneously distributed inside the amorphous matrix. Apparent fracture toughness of the tungsten-fiber-reinforced composites was lower than that of monolithic amorphous alloy, while that of the tantalum-fiber-reinforced composite was higher. According to the microfracture observation, shear bands or cracks were initiated at the amorphous matrix, and the propagation of the initiated shear bands or cracks was effectively blocked by fibers, thereby resulting in stable crack growth which could be confirmed by the fracture resistance curve (R-curve) behavior. This increase in fracture resistance with increasing crack length improved fracture properties of the fiber-reinforced composites, and could be explained by the formation of multiple shear bands or multiple cracks at the amorphous matrix, blocking of crack or shear band propagation, and multiple necking at metallic fibers. (C) 2009 Elsevier B.V. All rights reserved.
Keywords
Amorphous matrix composite; Continuous fiber; Liquid pressing process; Fracture toughness; MECHANICAL-PROPERTIES; FRACTURE-TOUGHNESS; ELASTOSTATIC STRESS; TENSILE PROPERTIES; ALLOY; MICROSTRUCTURE; TUNGSTEN; GLASS; BEHAVIOR; TEMPERATURES
URI
https://oasis.postech.ac.kr/handle/2014.oak/26004
DOI
10.1016/J.MSEA.2009.09.065
ISSN
0921-5093
Article Type
Article
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 527, no. 4-5, page. 941 - 946, 2010-02-15
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이성학LEE, SUNG HAK
Dept of Materials Science & Enginrg
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