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Materials 2018, 11(6), 984; https://doi.org/10.3390/ma11060984

The Particle Shape of WC Governing the Fracture Mechanism of Particle Reinforced Iron Matrix Composites

1
School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
2
College of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
*
Authors to whom correspondence should be addressed.
Received: 18 April 2018 / Revised: 2 June 2018 / Accepted: 8 June 2018 / Published: 11 June 2018
(This article belongs to the Special Issue Damage Detection and Characterization of High Performance Composites)
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Abstract

In this work, tungsten carbide particles (WCp, spherical and irregular particles)-reinforced iron matrix composites were manufactured utilizing a liquid sintering technique. The mechanical properties and the fracture mechanism of WCp/iron matrix composites were investigated theoretically and experimentally. The crack schematic diagram and fracture simulation diagram of WCp/iron matrix composites were summarized, indicating that the micro-crack was initiated both from the interface for spherical and irregular WCp/iron matrix composites. However, irregular WCp had a tendency to form spherical WCp. The micro-cracks then expanded to a wide macro-crack at the interface, leading to a final failure of the composites. In comparison with the spherical WCp, the irregular WCp were prone to break due to the stress concentration resulting in being prone to generating brittle cracking. The study on the fracture mechanisms of WCp/iron matrix composites might provide a theoretical guidance for the design and engineering application of particle reinforced composites. View Full-Text
Keywords: tungsten carbide; microstructure; mechanical properties; fracture mechanism; second phases; particle reinforced composites tungsten carbide; microstructure; mechanical properties; fracture mechanism; second phases; particle reinforced composites
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Li, Z.; Wang, P.; Shan, Q.; Jiang, Y.; Wei, H.; Tan, J. The Particle Shape of WC Governing the Fracture Mechanism of Particle Reinforced Iron Matrix Composites. Materials 2018, 11, 984.

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