Microstructure, Texture and Mechanical Properties in Aluminum Produced by Friction-Assisted Lateral Extrusion

• Published in: Materials Vol. 14; no. 9; p. 2465
• Main Authors: Vu, Viet Q., Toth, Laszlo S., Beygelzimer, Yan, Zhao, Yajun
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 10.05.2021; MDPI
• Subjects: Aluminum; aluminum Al-1050; Chemical Sciences; Crystallography; Ductility tests; Engineering Sciences; Extrusion; Friction; friction-assisted lateral extrusion process (FALEP); grain refinement; Grain size; Industrial applications; Lankford parameter; Mechanical properties; Metal sheets; Microstructure; Parameters; Plastic deformation; Polycrystals; Room temperature; Sample size; severe plastic deformation (SPD); Shear planes; Shear strain; simple shear texture; Tensile tests; Texture; friction-assisted lateral extrusion process (FALEP); aluminum Al-1050; simple shear texture; grain refinement; Texture and Mechanical Properties in Aluminum Produced by Friction-Assisted Lateral; severe plastic deformation (SPD); Lankford parameter
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma14092465

The Friction-Assisted Lateral Extrusion Process (FALEP) is a severe plastic deformation (SPD) technique for producing metal sheets from bulk metal or powder in one single deformation step at room temperature. In the present work, aluminum Al-1050 was deformed by FALEP. Then, its microstructure was examined by EBSD; the crystallographic texture by X-ray; material strength, ductility, and the Lankford parameter by tensile testing; the latter also by polycrystal plasticity simulations. It is shown that the microstructure was highly refined, with the grain size reduced more than 160 times down to 600 nm under the imposed shear strain of 20. The obtained texture was a characteristic simple shear texture with a shear plane nearly parallel to the plane of the sheet. The yield and ultimate strengths increased by about 10 times and three times, respectively. The Lankford parameter was 1.28, which is very high for aluminum, and due to the specific shear texture, unusual in a sheet. All these exceptional characteristics of Al-1050 were obtained thanks to the efficiency of the FALEP SPD process, which is a promising candidate for industrial applications.