High temperature mechanical properties in order to study the reinforcement volume fraction of extruded TiBw/Ti60 composites for different purposes.Theincrease of the volume fraction were 0%,1%,3%,5%,7% of the extruded TiBw/Ti60 composites under high temperature (600 ° C,650 ° C,700 ° C,750 ° C,800 ° C) tensile test,high temperature mechanical properties of TiBw/Ti60 composites.Effect of heat treatment process on the properties and microstructure of titanium matrix composites.To explore the relationship between the volume fraction and high temperature mechanical properties of reinforced.To observe the effects of different temperature and tensile fracture of nearby SEM organization,analysis of the fracture process.
Observed near the elevated temperature tensile fracture surfaces of the SEM organization:with increasing tensile test temperature,the fracture form of TiBw/Ti60 composite material mainly by the enhancement of phase breaking intothe interfacial debonding,the microstructure near 800 ° C under the tensile fracture can be observed that a large number of holes.
Through the high temperature tensile test data analysis:the reinforcement was added to make the high temperature mechanical properties of TiBw/Ti60 composites increase.But not the volume fraction is higher and higher,the high temperature mechanical properties are better.But there is a high temperature mechanical properties of the optimal volume fraction.The experimental results show that:the high temperature mechanical properties of reinforcement volumefraction of TiBw/Ti60 composite 5% best.