June 29, 2023 Comments Off

Aluminum alloy extruded materials, especially aluminum profiles, often have a kind of "pitting" defect on the surface during the extrusion process, which is called "pitting surface" in production [1]. Pockmarked surface of aluminum

June 15, 2023 Comments Off

The R&D and manufacturing of large aircraft is an industry with a high value chain. The C919 alone has driven the development of 5 major categories, 20 majors, and more than 6,000 civil