Active control method for uniform distribution and growth direction of reinforcing phase in particle reinforced titanium-based composite material

Abstract

The invention relates to the field of titanium alloy additive manufacturing, in particular to an active control method for uniform distribution and growth direction of a reinforcing phase in a particle reinforced titanium-based composite material. The method comprises the following steps of 1) preparing a base material; 2) preparing a forming material, wherein the forming material adopts titanium-based composite material pre-alloyed powder, and the oxygen content of the forming material is lower than 0.2%; 3) conducting a forming process, wherein a formed component is prepared in a laser additive manufacturing mode, laser energy density control is adopted in the forming process, and the laser energy density is made to be within the range of 50-350 J / mm<3>; and 4) conducting heat treatment, wherein the formed component is subjected to proper annealing treatment. According to the active control method, active control over distribution and form of the reinforced phase in the particle reinforced titanium-based composite material can be achieved, and the mechanical property of the titanium-based composite material is effectively improved.

Description

technical field [0001] The invention relates to the field of additive manufacturing of titanium alloys, in particular to a method for uniform distribution of reinforcement phases and active control of growth direction in particle-reinforced titanium-based composite materials. Background technique [0002] Ultra-high-speed aircraft technology is the strategic commanding height in the aerospace field in the 21st century, and has become one of the strategic development directions that the world's powerful countries are concerned about. The large-scale exploitation of space plays a vital role and will be widely used in both industrial and military fields. Ultra-high-speed aircraft serve in the atmosphere and complex ionized gas environment, and its sharp nose cone and wing leading edge will experience severe aerodynamic heating process, which will be an extremely severe challenge to the heat-resistant materials and structures of the aircraft, especially for The reliability of c...

AI Technical Summary

Problems solved by technology

[0003] However, due to the complex forming process of titanium matrix composites, it is difficult to prepare titanium matrix composite components with controllable shape and uniform structure by traditional material preparation technology.

For example: titanium-based composite materials prepared by forging method are difficult to achieve good matching of strong plasticity; titanium-based composite materials prepared by powder metallurgy method have high defect rate in the structure and limited component precision and size; prepared by casting method It is difficult to control the morphology and size of the microstructure and reinforcement phase of titanium matrix composites

At the same time, for components with high reinforcement phase, defects such as cracks, defects, collapse and pores are easily produced during machining, which leads to the scrapping of components

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