Theoretical prediction method of Young's modulus and yield strength of micron particle reinforced metal matrix composites at different temperatures

To begin with, a theoretical characterization model of temperature and porosity dependent Young's modulus for micron particle reinforced metal matrix composites is established by considering the evolution of properties of reinforced particles and metal matrix with temperature. Additionally, combining the existing strengthening mechanism theory and incorporating the influence of grain boundary slip on the related strengthening mecha-nism and the yield strength of metal matrix, a temperature dependent yield strength analysis model of micron particle reinforced metal matrix composites is proposed. These models only require material parameters at room temperature and temperature dependent specific heat capacity at constant pressure for application. In addition, the predicted results from these models are reasonable and consistent with measured results. Moreover, based on the established models, the effects of key material parameters and main mechanisms on Young's modulus and yield strength of composites and their variation with temperature are explored. Furthermore, the variation of various control mechanisms with the particle size and temperature is clarified. It lays a theoretical foundation for the development of micron particle reinforced metal matrix composites that are suitable for high-temperature environments and for the optimization of their key parameters.

Automated summary

A theoretical model characterizing the temperature and porosity dependent Young's modulus for micron particle reinforced metal matrix composites is established. Additionally, a temperature dependent yield strength analysis model is proposed by incorporating the influence of grain boundary slip on strengthening mechanisms and the yield strength. These models only require material parameters and temperature dependent specific heat capacity for application, and the predicted results are consistent with measured results. The effects of material parameters and mechanisms on Young's modulus and yield strength, as well as their variations with temperature, are explored based on these models.