公开(公告)号：US12017302B2

公开(公告)日：2024-06-25

申请号：US18272610

申请日：2022-04-19

Applicant: JIANGSU UNIVERSITY

Inventor： Jianzhong Zhou ,  Yanqiang Gou ,  Shu Huang ,  Xiankai Meng ,  Pengfei Li ,  Yu Zhang

IPC: B23K26/362 ,  B23K26/70

CPC classification number: B23K26/362 ,  B23K26/703

Abstract: A stress and texture morphology controlling method for preparing a super-hydrophobic surface of an aluminum alloy by laser etching includes the following steps: pretreating a surface of an aluminum alloy; fixing a pretreated aluminum alloy to an ultrasonic vibration platform, continuously charging flowing liquid nitrogen to a to-be-machined surface of the aluminum alloy, and controlling a flow of the liquid nitrogen to cool the to-be-machined surface of the aluminum alloy and keep the to-be-machined surface of the aluminum alloy at a low temperature; keeping stable flowing of the liquid nitrogen on the to-be-machined surface of the aluminum alloy after the to-be-machined surface of the aluminum alloy is cooled, using the ultrasonic vibration platform to generate a high-frequency ultrasonic vibration field, and etching the to-be-machined surface of the aluminum alloy to form a super-hydrophobic textured micro-nano structure surface; and reducing a surface energy of the super-hydrophobic textured micro-nano structure surface.

公开(公告)号：US11625514B2

公开(公告)日：2023-04-11

申请号：US17614569

申请日：2021-06-18

Applicant: Jiangsu University

Inventor： Jianzhong Zhou ,  Yanqiang Gou ,  Jianian Yang ,  Xiankai Meng ,  Qi Sun ,  Shu Huang ,  Qiang Fu

IPC: G06F30/20

Abstract: The present disclosure provides a numerical simulation method of pulsed laser paint removal and a use thereof. This method establishes a three-dimensional (3D) temperature field model by ANSYS software to perform a numerical simulation of nanosecond pulsed laser paint removal. A high-speed moving pulsed laser is loaded on a surface of the model in a form of heat flux, and a coordinate system is moved to realize loading on different paths. A special surface mesh screening method is used to realize loading on any surface, and it ensures that laser energy distribution on a material surface is in line with reality. In addition, an element birth/death technology is combined to remove an element that exceeds a threshold, so as to intuitively present the surface morphology after laser paint removal. The present disclosure can realize the prediction of the contour of a paint layer ablated by a pulsed laser.

公开(公告)号：US11753694B1

公开(公告)日：2023-09-12

申请号：US18023395

申请日：2022-06-06

Applicant: JIANGSU UNIVERSITY

Inventor： Jianzhong Zhou ,  Yanqiang Gou ,  Li Li ,  Yu Zhang ,  Xiankai Meng ,  Shu Huang ,  Gaoqiang Jiang ,  Pengfei Li ,  Xv Feng

IPC: C21D10/00 ,  C22C21/00

CPC classification number: C21D10/005 ,  C22C21/00

Abstract: A pulse current-assisted laser peen forming and hydrophobic surface preparing method for an aluminum alloy includes the following steps: placing a pretreated aluminum alloy onto a shock platform, where electrodes are respectively provided at two ends of the aluminum alloy, and flowing silicone oil covers a surface of the aluminum alloy; determining a laser energy; applying a high-frequency pulse current to the surface of the aluminum alloy through the electrodes, where a shot peening laser generates a laser beam according to the laser energy to shock the surface of the aluminum alloy, and under an action of an electrical pulse and laser shock, the aluminum alloy shows a bent arc-shaped surface, with a shock surface forming a porous micro-nano multi-stage surface; and performing chemical modification on the shock surface of the aluminum alloy to reduce a surface energy of the material, thereby obtaining a super-hydrophobic arc-shaped aluminum alloy surface.

公开(公告)号：US10745776B2

公开(公告)日：2020-08-18

申请号：US15752444

申请日：2015-09-07

Applicant: Jiangsu University

Inventor： Jianzhong Zhou ,  Xiankai Meng ,  Shu Huang ,  Jie Sheng ,  Chun Su ,  Hongda Zhou ,  Xiangwei Yang ,  Hansong Chen

IPC: C21D10/00 ,  B23K26/348 ,  B23K26/356

Abstract: A method and a device for increasing a laser induced shock wave pressure. According to the method, plasmas (21) are generated by impinging an aluminium foil (20) using lasers; a high-voltage pulse electrode (22) discharges to the plasmas (21) to induce and form a photoelectric combined energy field and then high-temperature plasmas (21) having the characteristics of an ultra-high density and an ultra-high speed expansion are induced and generated; a surface to be processed is impacted by the high-temperature plasmas (21) in a restrained state; the laser induced shock wave pressure is increased substantially; the surface of a high-strength material is reinforced, and the strength, hardness, abrasion resistance and anti-fatigue performances of the high-strength material are improved. The device comprises a laser, the electrode (22), a high-voltage power supply (4), a discharging medium (12), a moving platform, etc.

公开(公告)号：US11839934B1

公开(公告)日：2023-12-12

申请号：US18010839

申请日：2022-07-18

Applicant: JIANGSU UNIVERSITY

Inventor： Jianzhong Zhou ,  Yanqiang Gou ,  Li Li ,  Hongxu Pu ,  Songling Chen ,  Xiankai Meng ,  Shu Huang

IPC: B23K26/30 ,  B23K26/352

CPC classification number: B23K26/355

Abstract: A method for preparing a super-hydrophobic aluminum alloy surface through flat-topped laser peening includes the following steps: pretreating an aluminum alloy surface; evenly coating the pretreated aluminum alloy surface with a nanoscale carbon powder layer; performing unconstrained peening treatment on the aluminum alloy surface using a square spot flat-topped nanosecond pulsed laser with the nanoscale carbon powder layer serving as an absorption layer, where beams are kept perpendicular to the aluminum alloy surface all the time; and removing residual carbon nanopowder after the peening, and reducing surface energy of the aluminum alloy material through low-temperature heat treatment, to obtain a super-hydrophobic aluminum alloy surface with micro-nano multiscale structures. According to the present disclosure, the carbon content near the surface layer of the aluminum alloy material is increased, and the hardness and wear resistance of the prepared hydrophobic surface can be effectively improved.

公开(公告)号：US11692236B2

公开(公告)日：2023-07-04

申请号：US17565421

申请日：2021-12-29

Applicant: Jiangsu University

Inventor： Xiankai Meng ,  Yaomin Zhao ,  Jinzhong Lu ,  Jianzhong Zhou ,  Yanhu Zhang ,  Shu Huang ,  Jie Cai ,  Pengfei Li

IPC: C21D10/00 ,  F01D5/28

CPC classification number: C21D10/005 ,  F01D5/286 ,  G01N2291/0234

Abstract: The present invention provides a device for peening by coupling a laser shock wave and an ultrasonic shock wave in real time. The device includes a synchronization device, a laser device, two ultrasonic shock devices, a working platform and a control system. An upper casing is supported above a base through second hydraulic cylinders. Two supporting beams are provided under the upper casing through the second hydraulic cylinders. Limiting slide rails are provided under the upper casing through first hydraulic cylinders. The two ultrasonic shock devices are connected through the synchronization device, which is configured to synchronize movement and rotation of the two ultrasonic shock devices. The laser device is configured to generate a laser beam to pass through the upper casing and irradiate a surface of a workpiece. The control system controls the laser device to lag behind the two ultrasonic shock devices to perform laser shock.

公开(公告)号：US12128501B2

公开(公告)日：2024-10-29

申请号：US18286758

申请日：2022-07-08

Applicant: Jiangsu University

Inventor： Jianzhong Zhou ,  Lei Huang ,  Yanqiang Gou ,  Xiankai Meng ,  Shu Huang ,  Pengfei Li ,  Li Li ,  Gaoqiang Jiang ,  Xu Feng

IPC: B23K26/356 ,  C21D10/00 ,  C22C21/00 ,  C23C22/02 ,  C23C22/05 ,  B23K101/34 ,  B23K103/10

CPC classification number: B23K26/356 ,  C21D10/005 ,  C22C21/00 ,  C23C22/02 ,  C23C22/05 ,  B23K2101/35 ,  B23K2103/10 ,  C23C2222/20

Abstract: The present disclosure provides a method for preparing a superhydrophobic surface of an aluminum alloy through laser peening, including the following steps: coating a surface of the aluminum alloy as an absorption layer with an organic component-containing confinement layer to obtain a coated aluminum alloy, where the organic component-containing confinement layer is a mixed organic solution including 5 mL to 10 mL of perfluorooctyltriethoxysilane (FOTS), 100 mL to 200 mL of absolute ethanol, and 30 mL to 50 mL of distilled water; and subjecting a surface of the coated aluminum alloy to the laser peening to form the superhydrophobic surface.

公开(公告)号：US11542572B2

公开(公告)日：2023-01-03

申请号：US16332754

申请日：2016-09-21

Applicant: JIANGSU UNIVERSITY

Inventor： Xiankai Meng ,  Jianzhong Zhou ,  Chun Su ,  Jie Sheng ,  Jiale Xu ,  Jing Li ,  Shu Huang

IPC: C21D10/00 ,  B23K26/356 ,  B23K26/70 ,  C21D6/04 ,  C21D11/00 ,  F25D3/10 ,  F25D29/00 ,  C22F1/18

Abstract: In a cryogenic workbench, a cryogenic laser peening system and a control method, a tapered surface gap d is adjusted, based on the electromagnetic principle, to control the gasification volume of liquid nitrogen, then the temperatures of the copious cooling workbench and the surface of a sample are precisely controlled by means of the adjustment of the heat absorption amount of liquid nitrogen gasification, the temperature adjustment range and the temperature rising/lowering rate of the cryogenic laser peening system are effectively extended, and the precision of the control of the surface temperature of the sample is increased in combination with a closed-loop control. Additionally, an intelligent control of a cryogenic laser peening process is realized by means of a computer and a PLC control unit, whereby the usage amount of liquid nitrogen in the experiment process is reduced and the processing efficiency is improved.

公开(公告)号：US11123826B1

公开(公告)日：2021-09-21

申请号：US17257337

申请日：2020-04-28

Applicant: JIANGSU UNIVERSITY

Inventor： Jianzhong Zhou ,  Kun Huo ,  Fengze Dai ,  Xiankai Meng ,  Pengfei Li ,  Shu Huang ,  Jinzhong Lu

IPC: B23K37/06 ,  B23K37/04 ,  B23K26/34

Abstract: An electromagnetic apparatus for active intervention to a shape of a molten pool is provided. In the present invention, a workpiece is placed on stepped surfaces of a test bench. Upon power on, a metal rod rotates to generate a toroidal magnetic field centered on the metal rod, and the toroidal magnetic field acts on the molten pool to generate an induced current. The induced current generates Lorentz force under the action of the magnetic field, which acts perpendicularly on an outer surface of the molten pool, thereby changing the height, depth and width of the molten pool, and finally realizing the active intervention to the molten pool shape.