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

Viet Q Vu1,2,3, Laszlo S Toth1,2, Yan Beygelzimer4

  • 1Laboratory of Excellence Design of Alloy Metals for Low-Mass Structures, CNRS, University of Lorraine, 57070 Metz, France.

Materials (Basel, Switzerland)
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Summary

The Friction-Assisted Lateral Extrusion Process (FALEP) significantly refines aluminum microstructure, enhancing its strength and ductility. This severe plastic deformation technique shows promise for industrial applications due to its efficiency at room temperature.

Keywords:
Lankford parameteraluminum Al-1050friction-assisted lateral extrusion process (FALEP)grain refinementsevere plastic deformation (SPD)simple shear texture

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Area of Science:

  • Materials Science
  • Mechanical Engineering

Background:

  • Severe plastic deformation (SPD) techniques are crucial for enhancing material properties.
  • Friction-Assisted Lateral Extrusion Process (FALEP) is an SPD method for producing metal sheets.
  • Room-temperature processing is desirable for industrial scalability.

Purpose of the Study:

  • To investigate the effects of FALEP on Al-1050 aluminum.
  • To characterize the resulting microstructure, crystallographic texture, and mechanical properties.
  • To evaluate the potential of FALEP for industrial applications.

Main Methods:

  • Aluminum Al-1050 was processed using FALEP at room temperature.
  • Microstructure was analyzed using Electron Backscatter Diffraction (EBSD).
  • Crystallographic texture was determined by X-ray diffraction.
  • Tensile testing was performed to measure strength, ductility, and the Lankford parameter.
  • Polycrystal plasticity simulations were used for Lankford parameter analysis.

Main Results:

  • Grain size was reduced over 160 times to 600 nm due to a shear strain of 20.
  • A simple shear texture was observed, with the shear plane parallel to the sheet plane.
  • Yield strength increased approximately 10-fold, and ultimate strength increased 3-fold.
  • A high Lankford parameter of 1.28 was recorded, attributed to the unique shear texture.

Conclusions:

  • FALEP effectively refines the microstructure of Al-1050 aluminum.
  • The process induces a unique crystallographic texture leading to exceptional mechanical properties.
  • FALEP is a highly efficient SPD technique with significant potential for industrial metal sheet production.