Method for researching high-temperature deformation behavior of tungsten-rhenium-hafnium carbide alloy

Abstract

The invention discloses a method for researching a high-temperature deformation behavior of a tungsten-rhenium-hafnium carbide alloy. The method comprises the following steps of 1, weighing W powder, Re powder and HfC powder, performing high-energy ball milling, and then performing hot pressed sintering to obtain the tungsten-rhenium-hafnium carbide alloy; 2, obtaining stress and strain data under different conditions through a thermal compression test, and then constructing a constitutive relation model and training an artificial neural network model; 3, determining the prediction accuracy of the two models, and selecting the model with higher accuracy to predict the high-temperature deformation behavior of the tungsten-rhenium-hafnium carbide alloy; and 4, researching the structure and texture evolution of a sample in the thermal compression test, and obtaining the high-temperature deformation behavior of the tungsten-rhenium-hafnium carbide alloy in combination with a prediction result. According to the method, a stress-strain curve obtained through the thermal compression test of the tungsten-rhenium-hafnium carbide alloy is combined with a constitutive equation, the artificial neural network and a microstructure, the relation between the deformation behavior of the tungsten-rhenium-hafnium carbide alloy and dynamic recovery and dynamic recrystallization of the microstructure is disclosed, and the predictability on the deformation behavior of the tungsten-rhenium-hafnium carbide alloy is good.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a research method for high-temperature deformation behavior of a tungsten-rhenium-hafnium carbide alloy. Background technique [0002] Tungsten (W) has unique mechanical properties including high melting point (3410°C), high modulus, excellent heat resistance and ablative properties, making it an ideal material for high temperature applications including turbines, fusion reactors and kinetic energy penetration device. However, the strength of pure tungsten is greatly reduced at high temperatures. Alloying is an effective way to improve the strength of materials, and the addition of rhenium (Re) has been proven to improve the room temperature ductility and high temperature strength of tungsten (W). However, due to the small reserves and high price, rhenium cannot be added in large quantities to enhance the strength of the metal. The combination of refractory...

AI Technical Summary

Problems solved by technology

However, no report on the high-temperature deformation mechanism and constitutive equation model of HfC-doped tungsten-rhenium alloy has been found

Images