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A unified microstructural metal plasticity model applied in testing, processing, and forming of aluminium alloys

  • Bjørn Holmedal EMAIL logo , Knut Marthinsen and Erik Nes
Published/Copyright: January 28, 2022

Abstract

Over the last seven years a collection of models has been developed and put together by Nes, Marthinsen and co-workers in what here will be referred to as the Microstructure-based Metal Plasticity model, or in short as the MMP model. An overview of the most important modelling aspects will be given here. The basic mechanisms are related to the way the dislocations are stored and recovered in the lattice and how they affect the flow stress during deformation. The model at its current state is able to predict the microstructure evolution and the corresponding flow stress for the entire temperature range and for large strain rates as well as creep behaviour. The inherited processing-related quantities, such as grain size, solute content of alloying elements, and the texture, are taken into account, including a model for dynamic strain ageing. Anisotropy of the stress tensor is related mainly to the coupling to a texture model accounting for lattice rotations of the grains. However, a new and novel model is developed to cope with the transient behaviour, following strain path changes.


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

Dr. Bjørn Holmedal Norwegian University of Science and Technology Department of Materials Technology Alfred Getz vei 2, 7491 Trondheim, Norway Tel.: +47 73 59 49 04 Fax: +47 73 55 02 03

  1. This research was carried out mainly as part of the EU 5th FP projects VIR[FAB] (Contract No. G5RD-CT-1999-00132) and VIR[FORM] (Contract No. G5RD-CT-1999-00155). The authors would like to thank the VIR[FAB] and VIR[FORM] consortia for their collaboration and support. Financial support from the European Community and Hydro Aluminium is gratefully acknowledged.

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Received: 2005-02-10
Accepted: 2005-03-16
Published Online: 2022-01-28

© 2005 Carl Hanser Verlag, München

Articles in the same Issue

  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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