Titanium alloy dot matrix reinforced aluminum matrix composite and preparation method thereof

A technology for strengthening aluminum-based and composite materials, which is applied in the direction of additive processing and additive manufacturing, etc., to achieve the effects of increased specific stiffness, short process and strong operability

Active Publication Date: 2022-07-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no literature report on the preparation of aluminum matrix composites with adjustable structure by pressure infiltration in vacuum pressure infiltration. Therefore, it is of great significance to prepare aluminum matrix composites with excellent mechanical properties by pressure infiltration.

Method used

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  • Titanium alloy dot matrix reinforced aluminum matrix composite and preparation method thereof
  • Titanium alloy dot matrix reinforced aluminum matrix composite and preparation method thereof
  • Titanium alloy dot matrix reinforced aluminum matrix composite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] In this embodiment, the raw materials used in the preparation of the titanium alloy lattice structure reinforced aluminum matrix composite material are: Ti-6Al-4V powder with an average particle size of 20 μm, and a cylindrical 7075 aluminum alloy block. The specific preparation process is as follows:

[0037] (1) Using the three-dimensional modeling software Solidworks to design a Ti-6Al-4V titanium alloy lattice with a circular pore structure, and establish a three-dimensional model of the lattice. The Ti-6Al-4V titanium alloy lattice structure was printed by EOSINT M280 metal 3D printer. The size of the skeleton is Ф26×15mm, the porosity is 40%, the pore diameter is about 1mm, and the inner wall thickness of the lattice is 0.5mm;

[0038] (2) subjecting the Ti-6Al-4V titanium alloy lattice obtained by printing in step (1) to abrasive flow treatment, the abrasive is SiC, the pressure is 50Kg, and the time is 0.5h;

[0039] (3) put the Ti-6Al-4V titanium alloy lattice...

Embodiment 2

[0045] In this embodiment, the raw materials used in the preparation of the titanium alloy lattice structure reinforced aluminum matrix composite material are: Ti-6Al-4V powder with an average particle size of 20 μm, and a cylindrical 7075 aluminum alloy block. The specific preparation process is as follows:

[0046] (1) This step is similar to step (1) in Example 1, except that the skeleton is a honeycomb structure, the size of the skeleton is Ф12×15mm, the porosity is 40%, and the corresponding hexagon side length is 1mm , the wall thickness is 0.5mm;

[0047] (2) this step is identical with step (2) in embodiment 1;

[0048] (3) this step is similar to the step (3) in embodiment 1, and the difference is that the diameter of the crucible used is 16mm;

[0049] (4) this step is identical with step (4) in embodiment 1;

[0050] (5) this step is identical with step (5) in embodiment 1;

[0051] (6) this step is identical with step (6) in embodiment 1;

[0052] Tested titan...

Embodiment 3

[0054] In this embodiment, the raw materials used in the preparation of the titanium alloy lattice structure reinforced aluminum matrix composite material are: Ti-6Al-4V powder with an average particle size of 20 μm, and a cylindrical 7075 aluminum alloy block. The specific preparation process is as follows:

[0055] (1) This step is similar to step (1) in Example 2, except that the porosity of the skeleton is 60%, the corresponding hexagonal side length is 2 mm, and the wall thickness is 0.2 mm;

[0056] (2) this step is identical with step (2) in embodiment 2;

[0057] (3) this step is identical with step (3) in embodiment 2;

[0058] (4) this step is identical with step (4) in embodiment 2;

[0059] (5) this step is identical with step (5) in embodiment 2;

[0060] (6) this step is identical with step (6) in embodiment 2;

[0061] After testing, the compressive strength of the titanium alloy lattice reinforced aluminum matrix composite material reaches 930MPa, and the d...

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Abstract

The invention discloses a titanium alloy lattice structure reinforced aluminum-based composite material and a preparation method thereof. The titanium alloy lattice structure reinforced aluminum matrix composite comprises a Ti-6Al-4V lattice reinforcement body and an aluminum matrix, and the Ti-6Al-4V lattice reinforcement body is of a two-dimensional circular or two-dimensional honeycomb structure. According to the method, a three-dimensional model of a lattice structure of a Ti-6Al-4V lattice reinforcement is designed, and Ti-6Al-4V metal powder is formed through selective laser melting; the method comprises the following steps: heating an aluminum matrix and a Ti-6Al-4V dot matrix reinforcement body to 700-850 DEG C in a vacuum environment, and infiltrating the aluminum matrix into a dot matrix structure of the Ti-6Al-4V dot matrix reinforcement body by utilizing inert gas pressurization; and cooling to obtain the titanium alloy lattice structure reinforced aluminum matrix composite material. The composite material prepared by the invention is accurate and controllable in structure, so that the performance can be effectively regulated and controlled, and the composite material has the excellent characteristics of high specific strength and high elastic modulus.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a titanium alloy lattice structure reinforced aluminum matrix composite material and a preparation method thereof. Background technique [0002] In the aerospace field, light weight and high strength are the eternal pursuit goals of structural materials; and materials with high specific strength and specific stiffness mean that materials of the same quality have a greater ability to bear effective loads, that is, carrying capacity can be improved. The reduction in structural weight means that more fuel or other payload can be carried, which can increase the cost-effectiveness ratio per unit structural weight while increasing the flight distance; therefore, high specific strength and specific modulus can increase the life of the material and reduce the energy consumption and improve energy utilization. [0003] Aluminum alloy has the advantages of low density, good c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/04B22F10/66B22F10/28B22D23/04B33Y10/00
CPCC22C21/00C22C1/0416B22F10/28B22F10/66B22D23/04B33Y10/00Y02P10/25
Inventor 王智董志燕王勇张卫文杨超
Owner SOUTH CHINA UNIV OF TECH
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