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HomeMaterials Science ForumMaterials Science Forum Vol. 898Fracture Toughness of Tungsten Carbide Reinforced...

Fracture Toughness of Tungsten Carbide Reinforced Fe-Matrix Surface Composites

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Abstract:

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 (K_IC) of the WC layer calculated using the Niihara’s equation, was 5.21 MPa·m^1/2. 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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Periodical:

Materials Science Forum (Volume 898)

Pages:

1453-1458

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.898.1453

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Online since:

June 2017

Authors:

Xi Zhang, Li Sheng Zhong*, Xin Wang, Yun Hua Xu, Hong Wu, Yong Hong Fu

Keywords:

Fracture Toughness, In Situ, Indentation, Iron Matrix Surface Composites, Tungsten Carbide

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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