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Crack-free 4D printing titanium-nickel shape memory alloy and preparation method thereof

A memory alloy, crack-free technology, applied in the direction of additive manufacturing, process efficiency improvement, additive processing, etc., can solve the problems of memory alloy cracks, affecting mechanical properties, limiting the application of 4D printing titanium-nickel shape memory alloys, etc., to achieve yield Increased strength, good mechanical properties, and improved strength

Active Publication Date: 2018-12-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the 4D printed titanium-nickel shape memory alloys prepared by SLM have cracks, which seriously affect their mechanical properties and limit the application of 4D printed titanium-nickel shape memory alloys.

Method used

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  • Crack-free 4D printing titanium-nickel shape memory alloy and preparation method thereof
  • Crack-free 4D printing titanium-nickel shape memory alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The crack-free 4D printed titanium-nickel shape memory alloy has the following weight percentages of its components: Ni: 55%, Ti: 42%, Zr: 3%.

[0029] A method for preparing a crack-free 4D printing titanium-nickel shape memory alloy, comprising the steps of:

[0030] Proportion the metal raw materials according to the setting, and after fully and uniformly melting, use the gas atomization method to obtain 4D printing titanium-nickel shape memory alloy powder, and then sieve the powder after drying to obtain the powder with the required particle size;

[0031] Adjust the SLM equipment, and pour the 4D printed titanium-nickel shape memory alloy powder into the powder feeding cylinder or the powder hopper. The scanning range is controlled within the geometric range of the substrate;

[0032] Laser processing and forming, that is, the SLM control system first uses the laser to repeatedly scan the substrate and preheat, and then spread powder and perform SLM printing and ...

Embodiment 2

[0035] The crack-free 4D printed titanium-nickel shape memory alloy has the following weight percentages of its components: Ni: 55%, Ti: 42%, Zr: 3%.

[0036] A method for preparing a crack-free 4D printing titanium-nickel shape memory alloy, comprising the steps of:

[0037] Proportion the metal raw materials according to the setting, and after fully and uniformly melting, use the gas atomization method to obtain 4D printing titanium-nickel shape memory alloy powder, and then sieve the powder after drying to obtain the powder with the required particle size;

[0038] Adjust the SLM equipment, and pour the 4D printed titanium-nickel shape memory alloy powder into the powder feeding cylinder or the powder hopper. The scanning range is controlled within the geometric range of the substrate;

[0039] Laser processing and forming, that is, the SLM control system first uses the laser to repeatedly scan the substrate and preheat, and then spread powder and perform SLM printing and ...

Embodiment 3

[0042] The crack-free 4D printed titanium-nickel shape memory alloy has the following weight percentages of its components: Ni: 55%, Ti: 42%, Zr: 3%.

[0043] A method for preparing a crack-free 4D printing titanium-nickel shape memory alloy, comprising the steps of:

[0044] Proportion the metal raw materials according to the setting, and after fully and uniformly melting, use the gas atomization method to obtain 4D printing titanium-nickel shape memory alloy powder, and then sieve the powder after drying to obtain the powder with the required particle size;

[0045]Adjust the SLM equipment, and pour the 4D printed titanium-nickel shape memory alloy powder into the powder feeding cylinder or the powder hopper. The scanning range is controlled within the geometric range of the substrate;

[0046] Laser processing and forming, that is, the SLM control system first uses the laser to repeatedly scan the substrate and preheat, and then spread powder and perform SLM printing and f...

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Abstract

The invention discloses crack-free 4D printing titanium-nickel shape memory alloy and a preparation method thereof. The crack-free 4D printing titanium-nickel shape memory alloy comprises, by mass, 40%-80% of Ni, 10%-60% of Ti and 2%-10% of Zr. The surface of the prepared 4D printing titanium-nickel shape memory alloy is free of crack, mechanical properties are excellent, tensile strength is 740 MPa or above, and hardness is 280 HV or above.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation and forming manufacturing, and in particular relates to a crack-free 4D printing titanium-nickel shape memory alloy and a preparation method thereof. Background technique [0002] Titanium-nickel shape memory alloy is the earliest developed memory alloy. Since its development in 1963, it has been widely valued by the material science and engineering circles because of its excellent memory effect, stable performance and good biocompatibility. Due to the high processing cost and complicated preparation and processing technology of titanium-nickel shape memory alloy, its application in many fields is limited. In order to solve these problems, researchers need to continuously develop new preparation processes. SLM technology is an additive manufacturing technology that uses metal powder to be completely melted under the heat of a laser beam, and then cooled and solidified. Compared with th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C14/00C22C30/00B22F3/105B33Y10/00
CPCC22C14/00C22C19/007C22C19/03C22C30/00B33Y10/00B22F10/00B22F12/52B22F10/36B22F10/28B22F10/366B22F10/32B22F12/17Y02P10/25
Inventor 李瑞迪袁铁锤李澜波王敏卜牛朋达宋波史玉升陈超
Owner CENT SOUTH UNIV
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