4D printing method of nickel-titanium-based ternary shape memory alloy

A memory alloy and ternary alloy technology, which is applied in the additive manufacturing of NiTiZr ternary shape memory alloy and the field of 4D printing of nickel-titanium-based ternary shape memory alloy, can solve the problem of difficult to meet the manufacturing requirements of 4D printing components, single shape, Problems such as low forming accuracy, to avoid uneven composition of components, increase stability, and reduce material costs

Inactive Publication Date: 2020-10-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned preparation method has a single shape and low forming precision, and it is difficult to meet the manufacturing needs of complex structures of 4D printed components.

Method used

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  • 4D printing method of nickel-titanium-based ternary shape memory alloy
  • 4D printing method of nickel-titanium-based ternary shape memory alloy
  • 4D printing method of nickel-titanium-based ternary shape memory alloy

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Experimental program
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Effect test

Embodiment 1

[0037] Laser selective melting manufacturing process parameters are as follows: laser power 160W, scanning speed 700mm / s. The scanning distance and the powder layer thickness are the same as those in other embodiments, being 0.12mm and 0.03mm respectively. The final calculated energy density is 63.94J / mm 3 .

Embodiment 2

[0039] The manufacturing process parameters of selective laser melting are as follows: laser power 250W, scanning speed 1000mm / s. The scanning distance and the powder layer thickness are the same as those in other embodiments, being 0.12mm and 0.03mm respectively. The final calculated energy density is 69.44J / mm 3 .

Embodiment 3

[0041] Laser selective melting manufacturing process parameters are as follows: laser power 280W, scanning speed 1000mm / s. The scanning distance and the powder layer thickness are the same as those in other embodiments, being 0.12mm and 0.03mm respectively. The final calculated energy density is 77.78J / mm 3 .

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Abstract

The invention belongs to the technical field of 4D printing additive manufacturing, and discloses a 4D printing method of a nickel-titanium-based ternary shape memory alloy. The 4D printing method ischaracterized in that a selective laser melting technology is adopted for printing gas atomized prefabricated NiTiZr ternary alloy powder, and a component obtained through printing has the shape memory function; and the laser energy density is changed by changing the technological parameters adopted in the selective laser melting technology, and therefore the changes of the structure and performance of the printed piece are regulated and controlled. According to the 4D printing method, the ternary component Zr is introduced into an existing nickel-titanium binary alloy, the martensite phase transformation temperature is obviously increased, the selective laser melting technology is adopted for forming, and complex parts uniform in structure and high in density can be obtained while the excellent shape memory performance and mechanical performance are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of 4D printing additive manufacturing, and more specifically relates to a 4D printing method of a nickel-titanium-based ternary shape memory alloy, which is a method for additive manufacturing of a NiTiZr ternary shape memory alloy. Background technique [0002] 4D printing belongs to additive manufacturing technology, which can introduce stimulus-responsive smart materials and form smart materials through additive manufacturing technology, breaking the static state of traditional 3D printing, adding self-assembly, self-sensing, and self-adaptive performance, and providing high-end smart materials. The manufacture of components has brought new opportunities for development. [0003] As an important shape memory alloy smart material, NiTi alloy is widely used in aerospace, automobile, biomedicine, oil and other fields. However, the low transition temperature of nickel-titanium binary alloys does not exceed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105C22C19/03C22C1/04B33Y70/00B33Y10/00
CPCC22C1/0433C22C19/03B33Y70/00B33Y10/00C22C1/047Y02P10/25
Inventor 刘洁张媛玲宋波禹林闫春泽史玉升
Owner HUAZHONG UNIV OF SCI & TECH
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