Mechanical Properties and Fracture Mechanism of TiCp/ZA-12 Composites

摘要

TiCp/ZA-12 composites have been fabricated by XD™ method and stirring-casting techniques. The tests for mechanical properties reveal that the tensile strength and yield strength increase with increasing fraction of TiC particles. When the fraction of TiC particles increase up to 10%, the tensile strength and yield strength are 390MPa and 340MPa, respectively and they increase by 11% and 17% than that of matrix respectively. From the analysis of fractography we can see that mixed fracture of cleavage fracture and dimple fracture exists in the TiCp/ZA-12 composites, and fractured particles are not found. Finally the fracture model of composites has been established based on the experimental results.