US 11,753,694 B1
Pulse current-assisted laser peen forming and hydrophobic surface preparing method for aluminum alloy
Jianzhong Zhou, Zhenjiang (CN); Yanqiang Gou, Zhenjiang (CN); Li Li, Zhenjiang (CN); Yu Zhang, Zhenjiang (CN); Xiankai Meng, Zhenjiang (CN); Shu Huang, Zhenjiang (CN); Gaoqiang Jiang, Zhenjiang (CN); Pengfei Li, Zhenjiang (CN); and Xv Feng, Zhenjiang (CN)
Assigned to JIANGSU UNIVERSITY, Zhenjiang (CN)
Appl. No. 18/23,395
Filed by JIANGSU UNIVERSITY, Zhenjiang (CN)
PCT Filed Jun. 6, 2022, PCT No. PCT/CN2022/097093
§ 371(c)(1), (2) Date Feb. 27, 2023,
.
Claims priority of application No. 202210445786.2 (CN), filed on Apr. 26, 2022.
Int. Cl. C21D 10/00 (2006.01); C22C 21/00 (2006.01)
CPC C21D 10/005 (2013.01) [C22C 21/00 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A pulse current-assisted laser peen forming and hydrophobic surface preparing method for an aluminum alloy, comprising the following steps:
pretreating a surface of an aeronautical aluminum alloy;
placing a pretreated aluminum alloy onto a shock platform, wherein electrodes are respectively provided at two ends of the aluminum alloy, to locate a surface of the aluminum alloy and apply a high-frequency pulse current to the surface of the aluminum alloy; the surface of the aluminum alloy material serves as an absorbing layer, and flowing silicone oil covering the surface of the aluminum alloy serves as a confining layer, wherein the surface of the aluminum alloy is covered by the silicone oil at 30° C. to 100° C.;
determining a laser energy E according to material attributes of the aluminum alloy, and an acoustic impedance of each of the absorbing layer and the confining layer;
applying the high-frequency pulse current to the surface of the aluminum alloy through the electrodes to perform electrical pulse treatment on the aluminum alloy, wherein a shot peening laser generates a laser beam according to the laser energy E to shock the surface of the aluminum alloy; 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 multi-stage surface; and under the action of the electrical pulse and the laser shock, a middle of the aluminum alloy is protruded toward a laser shocking direction to form a deformed part with an arc-shaped cross section, two ends of the cross section being positions for locating the surface of the aluminum alloy; 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.