4D printing method for in-situ regulation of functional properties of nickel-titanium alloy and use thereof

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United States of America

PATENT NO 12226819
APP PUB NO 20210394269A1
SERIAL NO

17288924

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Abstract

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The present invention belongs to the field of additive manufacturing technology, and discloses a 4D printing method capable of in-situ regulating functional properties of nickel-titanium (NiTi) alloys and the application thereof. The method comprises the following steps: subjecting NiTi alloy bars to atomization milling to obtain NiTi alloy powder with a particle size of 15-53 μm, placing the NiTi alloy powder in a discharge plasma assisted ball mill for discharge treatment to promote the activation of powder activity, then adding nano-sized Ni powder with a particle size of 100-800 nm to obtain mixed powder, then continuing the discharge treatment to realize the metallurgical bonding between the NiTi alloy powder and the nano-sized Ni powder to obtain the modified powder, and finally using the additive manufacturing technology to prepare and form the modified powder into a functionalized NiTi alloy. The present invention achieves the metallurgical bonding between the nano-sized Ni powder and the large-sized spherical NiTi alloy powder by adding the nano-sized Ni powder in the process of discharge treatment, which is conducive to preparing a bulk alloy with uniform composition, structure and properties and the parts made therewith.

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Patent Owner(s)

  • SOUTH CHINA UNIVERSITY OF TECHNOLOGY; GUANGDONG HUAYI PLUMBING FITTINGS INDUSTRY CO., LTD.; SUN YAT-SEN UNIVERSITY CANCER CENTER (SYSUCC)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ding, Yanfei Kaiping, CN 5 3
Li, Yuanyuan Guangzhou, CN 189 502
Lu, Haizhou Guangzhou, CN 4 2
Wang, Jin Guangzhou, CN 805 11628
Yang, Chao Guangzhou, CN 249 849

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