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Cyclic friction assisted lateral extrusion process (C-FALEP): a severe plastic deformation route for continuous production of sheet metals
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DOI：10.1007/s10853-026-13526-w.png)
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Abstract
En 中文
This study presents a novel Severe Plastic Deformation (SPD) process, named the Cyclic-Friction Assisted Lateral Extrusion Process (C-FALEP), which was developed to produce sheet metal. The process enables the fabrication of long sheets while imposing large shear strains (~ 25) in a single step. The feasibility and effectiveness of this process are demonstrated on commercially pure Mg. Long, severe plastically deformed sheets of 25 mm width, with different thicknesses ranging from 1 to 0.2 mm and lengths ranging from 1.2 to 6.3 m, were produced. Detailed microstructural, textural, and mechanical characterization was performed on the 1 mm thick sheet. The process resulted in substantial grain refinement, reducing the average grain size from approximately 4000 µm in the as-cast condition to less than 4 µm after processing. The microstructures were homogeneous across the length and thickness of the sheet. A significant improvement in tensile strength, from 80 MPa (cast Mg) to 170 MPa, was achieved in the 1 mm thick sheet. Ductility dropped marginally from around 20 to 15%. Electron backscatter diffraction analysis revealed the development of a high fraction of recrystallized grains and high-angle grain boundaries, along with some sub-grain boundaries, indicating that grain fragmentation is dominated by continuous dynamic recrystallization. Additionally, the sheets developed a strong Basal texture along with a recently discovered Reverse Simple Shear (RSS) fiber texture, which is stabilized in reverse shear deformation. These results demonstrate the capability of C-FALEP for the scalable and continuous production of ultrafine-grained sheet materials with enhanced mechanical performance.
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