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Ferroic materials and anomalous strains

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Published/Copyright: January 27, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 96 Issue 4

Abstract

Ferroics are materials which become ferroelastic, ferromagnetic, or ferroelectric at lower temperatures on cooling. They usually show a phase transformation which produces an ordered state (low-entropy phase). Their properties are partially due to a domain structure. The strain effects are found either by cycling around the transformation temperature (two-way effect, invar), by mechanical straining plus heating above the transformation temperature (one-way memory) or by cyclic mechanical loading (pseudo- or rubber-elasticity).

Ferromagnetic or ferroelectric materials can be shaped by magnetic or electrical fields instead of mechanical stresses. In combination with a martensitic transformation, considerable strains are obtained in some ferromagnetic alloys, such as Ni2MnGa and other multiferroics.

Polymers can show one-way behaviour like metals, and ferro- and piezo-electrical behaviour like ceramics. The largest amounts of reversible strains are obtained with polymers, the smallest with ceramics. Porous charged polymers show hysteresis curves like ceramic ferroelectrics, but larger amounts of strain: ferro-electrets.

A systematic understanding of this group of materials permits to compare their abilities and limits. This, in turn, provides a basis for the selection of the best material for a certain application.

Keywords: Active materials; Ferroics; Martensitic transformation; Piezo-ceramics; Magnetostriction
Prof. em. Dr.-Ing. Dr. h. c. Erhard Hornbogen Ruhr-Universität Bochum Lehrstuhl Werkstoffwissenschaft Institut für Werkstoffe Fakultät für Maschinenbau, Gebäude IA 1/126 44780 Bochum, Germany Tel.: +49 2 34 32 2 30 22 Fax: +49 2 34 32 1 42 35

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Received: 2004-08-02
Accepted: 2005-01-26
Published Online: 2022-01-27

© 2005 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Articles Basic
  3. Ferroic materials and anomalous strains
  4. Neutron scattering, a powerful tool in material science considering superalloys as an example
  5. Investigation and modification of carbide sub-systems in the multicomponent Fe–C–Co–Cr–Mo–Si–V–W system
  6. Evolution of texture in pure magnesium during rolling
  7. Grain boundary radiotracer diffusion of 71Ge and 72Ga in Al and Al–Ga alloys
  8. Microstructures and thermal stability of metastable-phase precipitates formed in an Al–Cu alloy at 463 K
  9. Articles Applied
  10. The effect of instationary solidification conditions on the eutectic growth morphology in AlSi alloys
  11. Microstructural development in the heat-affected zone of a laser-cladded steel
  12. Microstructure formation in Ti–Si composite subjected to high temperature gradients
  13. Effect of natural ageing on the performance of pre-ageing to improve bake-hardening response of a twin-roll cast Al–Mg–Si alloy
  14. Residual stress evolution and near-surface microstructure after turning of the nickel-based superalloy Inconel 718
  15. Gefügeentwicklung in unter Druck hochverformten Metallen
  16. Articles History
  17. Alfred Wilm and the beginnings of Duralumin
  18. Notifications/Mitteilungen
  19. Personal/Personelles
  20. Books/Bücher
  21. News/Aktuelles
  22. Conferences/Konferenzen
https://doi.org/10.3139/ijmr-2005-0057
Keywords for this article
Active materials; Ferroics; Martensitic transformation; Piezo-ceramics; Magnetostriction

Articles in the same Issue

  1. Frontmatter
  2. Articles Basic
  3. Ferroic materials and anomalous strains
  4. Neutron scattering, a powerful tool in material science considering superalloys as an example
  5. Investigation and modification of carbide sub-systems in the multicomponent Fe–C–Co–Cr–Mo–Si–V–W system
  6. Evolution of texture in pure magnesium during rolling
  7. Grain boundary radiotracer diffusion of 71Ge and 72Ga in Al and Al–Ga alloys
  8. Microstructures and thermal stability of metastable-phase precipitates formed in an Al–Cu alloy at 463 K
  9. Articles Applied
  10. The effect of instationary solidification conditions on the eutectic growth morphology in AlSi alloys
  11. Microstructural development in the heat-affected zone of a laser-cladded steel
  12. Microstructure formation in Ti–Si composite subjected to high temperature gradients
  13. Effect of natural ageing on the performance of pre-ageing to improve bake-hardening response of a twin-roll cast Al–Mg–Si alloy
  14. Residual stress evolution and near-surface microstructure after turning of the nickel-based superalloy Inconel 718
  15. Gefügeentwicklung in unter Druck hochverformten Metallen
  16. Articles History
  17. Alfred Wilm and the beginnings of Duralumin
  18. Notifications/Mitteilungen
  19. Personal/Personelles
  20. Books/Bücher
  21. News/Aktuelles
  22. Conferences/Konferenzen
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