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Development of high-strength pure magnesium and wrought magnesium alloys AZ31, AZ61, and AZ91 processed by hydrostatic extrusion with back pressure

  • Wacek Pachla , Andrzej Mazur , Jacek Skiba , Mariusz Kulczyk and Sylwia Przybysz
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 103 Issue 5

Abstract

Cold hydrostatic extrusion with and without back pressure of commercial Mg 99.5+% and AZ31, AZ61, and AZ91 wrought magnesium alloys has been performed on a press operating up to 2000 MPa with a back pressure reaching up to 700 MPa. Application of back pressure extended the formability of Mg, and AZ-type magnesium alloys, which decreases with the increase in the Al content. Fibrous and elongated grains above 1 micrometre and nanometre scale sub-grains and grains were observed. The strength of all materials was significantly higher in comparison to materials conventionally and hydrostatically hot-extruded, hot ECAP-ed or after hot wire drawing. In comparison to materials processed by traditional methods the ultimate tensile strength increment after hydrostatic extrusion with back pressure increases gradually with an increase in Al content reaching for AZ91 almost 40%. The potential application of AZ-type magnesium alloys as semi-products for degradable medical implants or high strength structural components is indicated.

Keywords: Hydrostatic extrusion; Back pressure; Magnesium alloys; Mechanical properties; Microstructure
* Correspondence address Dr. Wacek Pachla Institute of High Pressure PhysicsPolish Academy of Sciencesul. Sokolowska 29, 01-142 Warszawa, Poland Tel.: +48 22 632 50 10 Fax: +48 22 632 42 18 E-mail:

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Received: 2010-12-6
Accepted: 2011-12-9
Published Online: 2013-06-11
Published in Print: 2012-05-01

© 2012, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110721
Keywords for this article
Hydrostatic extrusion; Back pressure; Magnesium alloys; Mechanical properties; Microstructure

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Phase equilibria in the “SnO”–SiO2–“FeO” system in equilibrium with tin–iron alloy and the potential application for electronic scrap recycling
  5. A model to calculate the viscosity of silicate melts
  6. Surface structure of different interstitial austenitic steels after impact wear
  7. Microstructural study of boron-doped Co–Re–Cr alloys by means of transmission electron microscopy and electron energy-loss spectroscopy
  8. Orientation relationship between 14H-LPSO structured X phase and DO3-type (Mg,Zn)3RE phase in an Mg–Gd–Y–Zn–Zr alloy
  9. Microstructural, optical, and dielectric properties of nanocrystalline TiO2 films prepared via ion-assisted magnetron sputtering
  10. An investigation of the microstructure and properties of the explosively welded Gr5–SS304 clad plates for golf heads
  11. Cyclic fibre texture in hot extruded Ni50Mn29Ga21
  12. Development of high-strength pure magnesium and wrought magnesium alloys AZ31, AZ61, and AZ91 processed by hydrostatic extrusion with back pressure
  13. Effect of cerium and aluminium on the hot-deformation behaviour of magnesium
  14. Effect of alloying elements on stage-III work-hardening behaviour of Al–Zn–Mg(–Cu) alloys
  15. Effect of titanium on the as-cast microstructure and impact toughness of hypereutectic high-chromium cast iron
  16. Microstructure and mechanical properties of nanocrystalline WC-particle-reinforced Ti-based composites with nano/ultrafine-grained intermetallic matrix from spark plasma sintering and crystallization of amorphous phase
  17. Plasticity enhancement in centrally confined Zr-based bulk metallic glass
  18. In-situ observation of the fracture process in Al–Zn–Mg–Cu alloys
  19. Relationship between the mechanical properties and the surface roughness of marble
  20. Light, multi-layer, screening textiles with a high capacity for absorbing electromagnetic fields in the high frequency range
  21. Immobilization of zinc oxide nanoparticles on cotton fabrics using poly 4-styrenesulfonic acid polyelectrolyte
  22. People
  23. Prof. Dr. rer. nat. Ludwig Schultz
  24. DGM News
  25. DGM News
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