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Enhancing mechanical properties of wires by a novel continuous severe plastic deformation method

  • Mojtaba Pourbashiri , Mohammad Sedighi , Cecilia Poletti and Christof Sommitsch
Published/Copyright: September 4, 2017
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 108 Issue 9

Abstract

Commercially pure Al wires are severely plastic deformed by a novel method called equal channel angular torsion drawing (ECATD) up to four passes. Initial wires are drawn through an equal channel angular die and simultaneously torsion deformed by turning the ECATD die. The wires are deformed up to an equivalent strain of 1 to 4 (based on FE result) at room temperature. The microstructural evolution of the wires is investigated using optical microscopy of both longitudinal and transverse cross-sections. A grain refinement from 100 μm to a mean grain size of 1–10 μm is achieved mainly at the areas near the surface of the wires. A decreasing trend of grain refinement is observed from the edge area to the wire center due to the non-uniform strain distribution, resulting in an inhomogeneous hardness. A significant increase in hardness is obtained from ∼22 HV to ∼43 HV at the wire center and to ∼60 HV at the wire edge, this confirms simulated equivalent plastic strain. The most important advantage of this process is the ability to impose continuous large plastic deformation on wires. It can be used as an industrial method for continuous strain hardening and grain refinement of wires.

Keywords: Wires; Grain refinement; Torsion deformation; Microstructure; Simulation and modeling
*Correspondence address, Prof. Mohammad Sedighi, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran – 1684613114, Iran, Tel: +98-77240540, Fax: +98-77240488, E-mail:

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Received: 2017-04-15
Accepted: 2017-06-13
Published Online: 2017-09-04
Published in Print: 2017-09-15

© 2017, Carl Hanser Verlag, München

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  4. Note from the Editor-in-Chief
  5. Original Contributions
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https://doi.org/10.3139/146.111537
Keywords for this article
Wires; Grain refinement; Torsion deformation; Microstructure; Simulation and modeling

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Note from the Editor-in-Chief
  5. Original Contributions
  6. Application of the grey-based fuzzy logic approach for materials selection
  7. Study of phase transformation and crystal structure of Co nanowires
  8. Continuous cooling transformation behavior and the kinetics of bainite formation in a bainitic–martensitic steel
  9. The substructures and crystallographic features of martensite in high-carbon steel after cryogenic treatment
  10. Mechanical characterization of YBCO thin films using nanoindentation and finite element method
  11. Enhancing mechanical properties of wires by a novel continuous severe plastic deformation method
  12. Evolution of microstructure and mechanical properties of Mg-3Al-1Zn alloy through the corner of a deep cup-shaped forged part
  13. Effects of oxidation time on corrosion resistance of plasma electrolytic oxidation coatings on magnesium alloy
  14. Experimental investigation of phase equilibria in the Ni–Nb–V ternary system
  15. Short Communications
  16. Thermal effects on electromagnetic properties of Cu1-xMgxFe2O4 ferrites
  17. DGM News
  18. DGM News
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