Fracture Toughness of Tungsten Carbide Reinforced Fe-Matrix Surface Composites
Tungsten carbide (WC) reinforced Fe-matrix surface composites were prepared by in-situ synthesis between tungsten plate and graphite in grey cast iron. The microstructure, fracture toughness, and fracture of the WC layer were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD...
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Published in | Materials science forum Vol. 898; pp. 1453 - 1458 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Pfaffikon
Trans Tech Publications Ltd
01.06.2017
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Subjects | |
Online Access | Get full text |
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Summary: | Tungsten carbide (WC) reinforced Fe-matrix surface composites were prepared by in-situ synthesis between tungsten plate and graphite in grey cast iron. The microstructure, fracture toughness, and fracture of the WC layer were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and the Vickers indentation technique, respectively. The results revealed that heat treated at 1125°C for 135min in argon atmosphere the main phase was WC with a bit of α-Fe. The fracture toughness (KIC) of the WC layer calculated using the Niihara’s equation, was 5.21 MPa·m1/2. Fractographic observations revealed that cracks propagated along the grain boundary under 2 kg loads. Moreover, both the WC particles and the interface between the WC layer and the matrix had a strong bonding strength. |
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Bibliography: | Selected, peer reviewed papers from the 17th IUMRS International Conference in Asia, (IUMRS-ICA), October 20-24, 2016, Qingdao, China |
ISSN: | 0255-5476 1662-9752 1662-9752 |
DOI: | 10.4028/www.scientific.net/MSF.898.1453 |