Startseite Technik Hot workability and extrusion modelling of magnesium alloys
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Hot workability and extrusion modelling of magnesium alloys

  • H. J. McQueen EMAIL logo und M. Sauerborn
Veröffentlicht/Copyright: 28. Januar 2022
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 96 Heft 6

Abstract

The hot working of commercial Mg alloys differs from creep in so far that twinning is much more prevalent in the early stages and dynamic recrystallization (DRX) becomes extensive above 400 °C. Subgrains form mainly near the grain boundaries and have similar dependence on stress; they were larger in hot working tests because of the much higher temperatures. Extrusion is ideal for breaking down the cast structure as a result of the high compressive mode to minimize cracking at segregated particles and to create a deformation zone reaching near 500 °C to ensure DRX for grain refinement. The constitutive equations and microstructures from torsion testing can be utilized in modeling to guide optimization of extrusion processing.

Keywords: Magnesium alloys; Hot workability; Twinning; Creep; Extrusion modeling
H. J. McQueen Concordia University Montreal H4A-2Y5 Montreal, Canada Tel.: +1 514 848 2424 3145 Fax: +1 514 848 3175

Dedicated to Professor Wolfgang Blum on the occasion of his 65th birthday

  1. The authors acknowledge the financial support of the Natural Sciences and Engineering Research Council of Canada, of the Deutsche Forschungsgemeinschaft and of the Alexander von Humboldt Foundation.

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Received: 2005-02-14
Accepted: 2005-03-18
Published Online: 2022-01-28

© 2005 Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Articles Basic
  5. Identifying creep mechanisms in plastic flow
  6. A unified microstructural metal plasticity model applied in testing, processing, and forming of aluminium alloys
  7. Implications of non-negligible microstructural variations during steady-state deformation
  8. Tertiary creep of metals and alloys
  9. Interactions between particles and low-angle dislocation boundaries during high-temperature deformation
  10. Strain-rate sensitivity of ultrafine-grained materials
  11. Transient plastic flow at nominally fixed structure due to load redistribution
  12. Vacancy concentrations determined from the diffuse background scattering of X-rays in plastically deformed copper
  13. Effect of heating rate in α + γ dual-phase field on lamellar microstructure and creep resistance of a TiAl alloy
  14. About stress reduction experiments during constant strain-rate deformation tests
  15. Finite-element modelling of anisotropic single-crystal superalloy creep deformation based on dislocation densities of individual slip systems
  16. Variational approach to subgrain formation
  17. Articles Applied
  18. Pseudoelastic cycling of ultra-fine-grained NiTi shape-memory wires
  19. Creep properties at 125 °C of an AM50 Mg alloy modified by Si additions
  20. Dependence of mechanical strength on grain structure in the γ′ and oxide dispersions-trengthened nickelbase superalloy PM 3030
  21. On the improvement of the ductility of molybdenum by spinel (MgAl2O4) particles
  22. Hot workability and extrusion modelling of magnesium alloys
  23. Characterization of hot-deformation behaviour of Zircaloy-2: a comparison between kinetic analysis and processing maps
  24. Requirements for microstructural investigations of steels used in modern power plants
  25. Influence of Lüders band formation on the cyclic creep behaviour of a low-carbon steel for piping applications
  26. Creep and creep rupture behaviour of 650 °C ferritic/martensitic super heat resistant steels
  27. Toughening mechanisms of a Ti-based nanostructured composite containing ductile dendrites
  28. Notifications/Mitteilungen
  29. Personal/Personelles
  30. News/Aktuelles
  31. Conferences/Konferenzen
https://doi.org/10.3139/ijmr-2005-0112
Schlagwörter für diesen Artikel
Magnesium alloys; Hot workability; Twinning; Creep; Extrusion modeling

Artikel in diesem Heft

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Articles Basic
  5. Identifying creep mechanisms in plastic flow
  6. A unified microstructural metal plasticity model applied in testing, processing, and forming of aluminium alloys
  7. Implications of non-negligible microstructural variations during steady-state deformation
  8. Tertiary creep of metals and alloys
  9. Interactions between particles and low-angle dislocation boundaries during high-temperature deformation
  10. Strain-rate sensitivity of ultrafine-grained materials
  11. Transient plastic flow at nominally fixed structure due to load redistribution
  12. Vacancy concentrations determined from the diffuse background scattering of X-rays in plastically deformed copper
  13. Effect of heating rate in α + γ dual-phase field on lamellar microstructure and creep resistance of a TiAl alloy
  14. About stress reduction experiments during constant strain-rate deformation tests
  15. Finite-element modelling of anisotropic single-crystal superalloy creep deformation based on dislocation densities of individual slip systems
  16. Variational approach to subgrain formation
  17. Articles Applied
  18. Pseudoelastic cycling of ultra-fine-grained NiTi shape-memory wires
  19. Creep properties at 125 °C of an AM50 Mg alloy modified by Si additions
  20. Dependence of mechanical strength on grain structure in the γ′ and oxide dispersions-trengthened nickelbase superalloy PM 3030
  21. On the improvement of the ductility of molybdenum by spinel (MgAl2O4) particles
  22. Hot workability and extrusion modelling of magnesium alloys
  23. Characterization of hot-deformation behaviour of Zircaloy-2: a comparison between kinetic analysis and processing maps
  24. Requirements for microstructural investigations of steels used in modern power plants
  25. Influence of Lüders band formation on the cyclic creep behaviour of a low-carbon steel for piping applications
  26. Creep and creep rupture behaviour of 650 °C ferritic/martensitic super heat resistant steels
  27. Toughening mechanisms of a Ti-based nanostructured composite containing ductile dendrites
  28. Notifications/Mitteilungen
  29. Personal/Personelles
  30. News/Aktuelles
  31. Conferences/Konferenzen
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