Method for preparing nickel-titanium two-way memory deformation part and intelligent structure through 4D printing

A technology of memory deformation and intelligent structure, which is applied in the direction of additive processing, etc., can solve the problems of poor processing performance of nickel-titanium alloy, difficulty in forming complex parts, difficult to realize two-way memory effect of complex parts, etc., and achieve the effect of solving difficult processing

Pending Publication Date: 2020-11-20
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, due to the poor processability of nickel-titanium alloys, the forming of complex parts is di

Method used

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  • Method for preparing nickel-titanium two-way memory deformation part and intelligent structure through 4D printing
  • Method for preparing nickel-titanium two-way memory deformation part and intelligent structure through 4D printing
  • Method for preparing nickel-titanium two-way memory deformation part and intelligent structure through 4D printing

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Experimental program
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Effect test

Embodiment 1

[0039] Aiming at the 4D printing intelligent structure technology described in the present invention, a 50.8 Ti 49.2 Powder is prepared as raw material such as Figure 5 The technological process of the rounded rhombus deformation unit, its steps are as follows:

[0040](1) First design the intelligent structure according to the requirements, determine the installation method of the deformation unit, and establish the computer three-dimensional model of the deformation unit. Nickel-titanium shape memory alloy is used as the material of the deformation unit, and a suitable constraining mold is selected according to the deformation requirements.

[0041] (2) with Ni 50.8 Ti 49.2 The powder is used as the raw material, and the deformation unit is prepared by Directed Energy Deposition (DED). The equipment cabin is first vacuumed, and then argon is introduced as the protective gas. Before printing starts, the substrate needs to be preheated to 150°C to prevent cracks. Under ...

Embodiment 2

[0046] Aiming at the 4D printing intelligent structure technology described in the present invention, a 50.8 Ti 49.2 The technical process for preparing the rounded rhombus deformation unit as a raw material, the steps are as follows:

[0047] First, design the intelligent structure according to the requirements, determine the installation method of the deformation unit, and establish the computer three-dimensional model of the deformation unit. Select the appropriate restraint mold according to the deformation requirements.

[0048] With Ni 50.8 Ti 49.2 Wire is used as the raw material, and the deformation unit is prepared by Directed Energy Deposition (DED). The equipment cabin is first vacuumed, and then argon is introduced as the protective gas. Before printing starts, the substrate needs to be preheated to 180°C to prevent cracks. Under the parameters of current 60A, machine speed 2mm / s, wire feeding speed 20mm / s. Figure 6 Shape one of the deformation unit shown. ...

Embodiment 3

[0052] Aiming at the 4D printing intelligent structure technology described in the present invention, a 50.8 Ti 49.2 Silk is prepared as a raw material such as Figure 6 The technological process of the shown rounded triangle deformation unit, its steps are as follows:

[0053] First, design the intelligent structure according to the requirements, determine the installation method of the deformation unit, and establish the computer three-dimensional model of the deformation unit. Nickel-titanium shape memory alloy is used as the material of the deformation unit, and a suitable constraining mold is selected according to the deformation requirements.

[0054] With Ni 50.8 Ti 49.2 Wire is used as the raw material, and the deformation unit is prepared by Directed Energy Deposition (DED). The equipment cabin is first vacuumed, and then argon is introduced as the protective gas. Before printing starts, the substrate needs to be preheated to 200°C to prevent cracks. Under the p...

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Abstract

The invention discloses a method for preparing a nickel-titanium two-way memory deformation part and an intelligent structure through 4D printing, and belongs to the technical field of metal additivemanufacturing. The method aims to design a part structure, determine a first shape and establish a three-dimensional digital model of the structure according to the two-way deformation requirement. The method comprises the following steps that a nickel-titanium alloy is printed into a part by adopting a 3D printing technology; the printed nickel-titanium memory alloy part is heated, water-coolingquenching is carried out after heat preservation, and solution treatment is carried out; the part subjected to solution treatment is installed in a deformation mold to be fixed into a second shape, and then the mold and the part are fixed into the second shape to be heated and subjected to heat preservation; and finally, the part is cooled to the room temperature, and a two-way memory effect is obtained. According to the method, the two-way memory effect of the nickel-titanium shape memory alloy is achieved in a constraint aging mode, the aging process is completed in the state of the second shape through a deformation die constraint component, and the method is a training method of the two-way memory effect; and the programmable deformation of the intelligent structure can be realized byassembling the small deformation parts and controlling the deformation of each unit.

Description

technical field [0001] The invention belongs to the technical field of metal additive manufacturing, and specifically relates to a method for preparing nickel-titanium two-way memory deformation parts and intelligent structures by 4D printing. Background technique [0002] 4D printing is an additive manufacturing method for smart materials and structures. The purpose is to use the response of smart materials to external factors, and add a dimension of influence on materials on the basis of 3D printing static manufacturing, so that printed products have sensing, control and drive function. [0003] Nickel-titanium shape memory alloy has excellent mechanical properties, fatigue resistance, wear resistance, corrosion resistance, high shape recovery rate, good biocompatibility and other characteristics, and its application scope involves aerospace, machinery, electronics, chemical industry, energy, construction, etc. engineering, civil and medical fields. [0004] Nickel-titan...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F3/24B33Y10/00B33Y50/02C22F1/10
CPCB22F3/24B33Y10/00B33Y50/02C22F1/002C22F1/10B22F2003/248
Inventor 戴挺张涛刘正迪李昌浩梁溢华蔡少泽丁辉
Owner SOUTHEAST UNIV
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