Patents by Inventor Haifei Lu

Haifei Lu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12179286
    Abstract: A method of strengthening through real-time coupling of electrical pulses and laser shock waves is provided. The initial time and duration of the electrical pulses are controlled to be matched with the initial time and duration of the laser shock waves, so that the electrical pulses and the laser shock waves are coupled in real time for material strengthening, the plasticity and the strength of the material are greatly improved, and a large area of the workpiece is uniformly strengthened. By simultaneously introducing the electrical pulses into the pulse current-assisted LSP, a great strengthening effect is achieved through the combination of the electrical pulses and the pulse current-assisted LSP in a short time, thereby reducing the internal defects of the material to a certain extent and further increasing the fatigue life of the material.
    Type: Grant
    Filed: July 26, 2022
    Date of Patent: December 31, 2024
    Assignee: JIANGSU UNIVERSITY
    Inventors: Jinzhong Lu, Weiwei Deng, Kaiyu Luo, Haifei Lu
  • Publication number: 20240288912
    Abstract: This application provides a support assembly and a terminal device, applied to the field of terminal technologies. The support assembly includes: a support member, where the support member has a first side surface and a second side surface that are opposite to each other, and a first end face connected between the first side surface and the second side surface, the first side surface has at least a first bendable area, the first bendable area is connected to the first end face, and a groove is disposed on the first end face; and a bonding structure, where at least a part of the bonding structure is located on the first side surface and the second side surface.
    Type: Application
    Filed: September 14, 2022
    Publication date: August 29, 2024
    Inventors: Yilin Lu, Yaolei Zhang, Haifei Li
  • Publication number: 20240261903
    Abstract: A method of strengthening through real-time coupling of electrical pulses and laser shock waves is provided. The initial time and duration of the electrical pulses are controlled to be matched with the initial time and duration of the laser shock waves, so that the electrical pulses and the laser shock waves are coupled in real time for material strengthening, the plasticity and the strength of the material are greatly improved, and a large area of the workpiece is uniformly strengthened. By simultaneously introducing the electrical pulses into the pulse current-assisted LSP, a great strengthening effect is achieved through the combination of the electrical pulses and the pulse current-assisted LSP in a short time, thereby reducing the internal defects of the material to a certain extent and further increasing the fatigue life of the material.
    Type: Application
    Filed: July 26, 2022
    Publication date: August 8, 2024
    Applicant: JIANGSU UNIVERSITY
    Inventors: Jinzhong LU, Weiwei DENG, Kaiyu LUO, Haifei LU
  • Patent number: 11248299
    Abstract: Disclosed is a combined treatment method for improving corrosion resistance of metal component in chlorine-containing solution. First, the metal component is placed in the chlorine-containing solution. Large-area overlapping laser shock peening without an absorbing layer is used, when laser pulses are irradiated on the target metal component, the metal matrix surface absorbs the laser energy, vaporizes and expands to form a high-temperature and high-pressure plasma, a chlorine-containing passivation film is formed, to improve the surface corrosion resistance of the metal component. After that, the surface layer of the metal component is subjected to surface polishing, followed by large-area overlapping laser shock peening with an absorbing layer at room temperature, to further improve the corrosion resistance of the metal component.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: February 15, 2022
    Assignees: Institute of Laser and Optoelectronics Intelligent Manufacturing, Wenzhou University, JiangSu University
    Inventors: Yao Xue, Kaiyu Luo, Haifei Lu, Jinzhong Lu
  • Patent number: 11148207
    Abstract: A laser shock peening method for an additive manufactured component of a double-phase titanium alloy is provided. First, a three-dimensional digital model of a complex component is obtained, and the model is divided into a plurality of slices; a forming direction of a formed part in an additive manufacturing process is determined according to a stress direction of the additive manufactured component in an engineering application; then, the component of the double-phase titanium alloy is formed and manufactured by selective laser melting, and orientations of a C-axis of an ? phase is allowed to be consistent through adjustment and control; and finally, laser shock peening is performed on all outer surfaces of the high-performance additive manufactured component of the double-phase titanium alloy by inducing a high-intensity shock wave to act in an acting direction which forms an angle in a predetermined range with the C-axis of the ? phase.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: October 19, 2021
    Assignee: JIANGSU UNIVERSITY
    Inventors: Kaiyu Luo, Haifei Lu, Jinzhong Lu, Xiancheng Zhang, Guang Yang
  • Publication number: 20210308767
    Abstract: A laser shock peening method for an additive manufactured component of a double-phase titanium alloy is provided. First, a three-dimensional digital model of a complex component is obtained, and the model is divided into a plurality of slices; a forming direction of a formed part in an additive manufacturing process is determined according to a stress direction of the additive manufactured component in an engineering application; then, the component of the double-phase titanium alloy is formed and manufactured by selective laser melting, and orientations of a C-axis of an ? phase is allowed to be consistent through adjustment and control; and finally, laser shock peening is performed on all outer surfaces of the high-performance additive manufactured component of the double-phase titanium alloy by inducing a high-intensity shock wave to act in an acting direction which forms an angle in a predetermined range with the C-axis of the as phase.
    Type: Application
    Filed: September 18, 2020
    Publication date: October 7, 2021
    Applicant: JIANGSU UNIVERSITY
    Inventors: Jinzhong LU, Haifei LU, Xiancheng ZHANG, Kaiyu LUO, Guang YANG
  • Patent number: 11103956
    Abstract: A double-side synchronous laser shock peening (LSP) method for leading edges of turbine blades employs two laser beams with the same diameter and different pulse energy to synchronously shock the front and back sides of each point within 8-10 mm range of the leading edge of the blade, wherein the laser pulse energy on the front side is greater than the laser pulse energy on the back side, and wherein, the laser power density on the front side is used to generate dynamic plastic deformation on the entire laser-shock spot area, while the laser power density on the back side is used to balance off excessive shock-wave pressure in the central area of laser-shock spot on the front side and avoid macroscopic deformation of the blade in the central area of laser-shock spot on the front side, and an optimal strengthening effect is achieved finally.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: August 31, 2021
    Inventors: Jinzhong Lu, Haifei Lu, Kaiyu Luo, Liujun Wu, Changyu Wang
  • Publication number: 20210205930
    Abstract: A double-side synchronous laser shock peening (LSP) method for leading edges of turbine blades employs two laser beams with the same diameter and different pulse energy to synchronously shock the front and back sides of each point within 8-10 mm range of the leading edge of the blade, wherein the laser pulse energy on the front side is greater than the laser pulse energy on the back side, and wherein, the laser power density on the front side is used to generate dynamic plastic deformation on the entire laser-shock spot area, while the laser power density on the back side is used to balance off excessive shock-wave pressure in the central area of laser-shock spot on the front side and avoid macroscopic deformation of the blade in the central area of laser-shock spot on the front side, and an optimal strengthening effect is achieved finally.
    Type: Application
    Filed: March 29, 2017
    Publication date: July 8, 2021
    Inventors: Jinzhong LU, Haifei LU, Kaiyu LUO, Liujun WU, Changyu WANG
  • Publication number: 20210164106
    Abstract: Disclosed is a combined treatment method for improving corrosion resistance of metal component in chlorine-containing solution. First, the metal component is placed in the chlorine-containing solution. Large-area overlapping laser shock peening without an absorbing layer is used, when laser pulses are irradiated on the target metal component, the metal matrix surface absorbs the laser energy, vaporizes and expands to form a high-temperature and high-pressure plasma, a chlorine-containing passivation film is formed, to improve the surface corrosion resistance of the metal component. After that, the surface layer of the metal component is subjected to surface polishing, followed by large-area overlapping laser shock peening with an absorbing layer at room temperature, to further improve the corrosion resistance of the metal component.
    Type: Application
    Filed: October 9, 2017
    Publication date: June 3, 2021
    Applicants: Institute of Laser and Optoelectronics Intelligent Manufacturing, Wenzhou University, JiangSu University
    Inventors: Yao XUE, Kaiyu LUO, Haifei LU, Jinzhong LU
  • Patent number: 10792766
    Abstract: The invention relates to additive manufacturing field and laser shock peening (LSP) field, in particular to a combined apparatus for layer-by-layer interactive additive manufacturing with laser thermal/mechanical effects. In the apparatus, a LSP module and a SLM module operate in alternate so as to perform LSP for the formed part in the forming process of the formed part, and thereby a better strengthening effect of the formed part is achieved. The invention effectively overcomes the challenges of “shape control” against deformation and cracking of the formed parts incurred by internal stress and “property control” against poor fatigue property of the formed parts incurred by metallurgical defects during additive manufacturing, improves fatigue strength and mechanical properties of the faulted parts, and realizes high-efficiency and high-quality holistic processing of the formed parts.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: October 6, 2020
    Assignee: JIANGSU UNIVERSITY
    Inventors: Jinzhong Lu, Haifei Lu, Jianhua Yao, Kaiyu Luo, Fangnian Lang, Liujun Wu, Yikai Shao
  • Publication number: 20200189037
    Abstract: The present invention relates to additive manufacturing field and laser shock peening (LSP) field, in particular to a combined apparatus for layer-by-layer interactive additive manufacturing with laser thermal/mechanical effects. In the apparatus, a LSP module and a SLM module operate in alternate so as to perform LSP for the formed part in the forming process of the formed part, and thereby a better strengthening effect of the formed part is achieved. The present invention effectively overcomes the challenges of “shape control” against deformation and cracking of the formed parts incurred by internal stress and “property control” against poor fatigue property of the formed parts incurred by metallurgical defects during additive manufacturing, improves fatigue strength and mechanical properties of the formed parts, and realizes high-efficiency and high-quality holistic processing of the formed parts.
    Type: Application
    Filed: June 8, 2017
    Publication date: June 18, 2020
    Inventors: Jinzhong LU, Haifei LU, Kaiyu LUO, Liujun WU, Yikai SHAO
  • Patent number: 9808781
    Abstract: Methods for the fabrication of transparent conductive metal nanowire networks are provided, as well as metal nanowire networks fabricated by such methods. A metal nanowire network can be immersed in a solution and illuminated for a duration of time. Selective nucleation and growth of metal nanoparticles can be induced at the junctions between metal nanowires.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: November 7, 2017
    Assignee: THE UNIVERSITY OF HONG KONG
    Inventors: Wallace C. H. Choy, Haifei Lu
  • Publication number: 20160038909
    Abstract: Methods for the fabrication of transparent conductive metal nanowire networks are provided, as well as metal nanowire networks fabricated by such methods. A metal nanowire network can be immersed in a solution and illuminated for a duration of time. Selective nucleation and growth of metal nanoparticles can be induced at the junctions between metal nanowires.
    Type: Application
    Filed: August 8, 2014
    Publication date: February 11, 2016
    Inventors: Wallace C.H. Choy, Haifei Lu