Effect of heat treatment on the microstructure and properties of CoCrFeNiMo0.2 particles reinforced titanium matrix composites

In this paper, the influence of heat treatment process on the microstructure and properties of CoCrFeNiMo0.2/Ti composites was studied by heat treatment of the composites. The structure and com-position of CoCrFeNiMo0.2/Ti composites were characterized by X-ray diffraction and optical microscope. The distribution of elements of the interface layer was explored by electron probe. The mechanical properties of the composites were analyzed by nano indentation experiment and hardness tester. The re-lationship between irregular particles and the thickness of the interface layer was studied. The results are as follows: when the heat treatment temperature is 770 ? the morphology of the high entropy alloy does not change significantly. As the temperature rises to 830 & DEG;C, the shape of the particles deforms and the thickness of the diffusion layer increases significantly. With the increase of the heat treatment temperature, the Young's modulus and hardness of the interface layer have increased. When the heat treatment tem-perature rises to 890 & DEG;C, the particles completely diffuse into the matrix. Overall, the distance of the par-ticles from the inscribed circle and the thickness of the interface layer are positively correlated.(c) 2022 Elsevier B.V. All rights reserved.

Automated summary

The influence of heat treatment process on the microstructure and properties of CoCrFeNiMo0.2/Ti composites was investigated. The results showed that the morphology of the high entropy alloy changed significantly as the heat treatment temperature increased. The shape of the particles deformed, and the thickness of the diffusion layer increased. Moreover, the Young's modulus and hardness of the interface layer also increased with the increase of heat treatment temperature.