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Manifestations of dynamic strain ageing in 2090 Al–Li alloy

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Veröffentlicht/Copyright: 2. Februar 2022
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 96 Heft 12

Abstract

The manifestations of dynamic strain ageing in a commercial 2090 Al – Li alloy were investigated in a wide range of temperatures (–40 to 100 °C) and strain rates (4.16×10–5 to 4.16×10–3 s–1 ). Serrated yielding, as a macroscopic manifestation of dynamic strain ageing, occurs under all testing conditions. Negative strain-rate sensitivity of the flow stress is also observed. Temperature rise and strain rate reduction cause the increase of the yield strength and the work-hardening rate, as well as the decrease of elongation – the behavior being typical for the range in which C-type serrations appear. These phenomena are related to the dislocation substructure, in which features characteristic for solute atoms blocking of dislocations and Orowan bypassing are observed.

Keywords: Dynamic strain ageing; 2090 Al – Li alloy; Serrated yielding; Negative strain rate sensitivity; Dislocation substructure
Dr. Nenad Ilić Stahlwerke Bremen, Arcelor Gruppe Produktentwicklung Auf den Delben 35, D-28237 Bremen, Germany Tel.: +49 421 648 3392 Fax: +49 421 648 2512

Now at: Stahlwerke Bremen, Arcelor Gruppe, D-28237 Bremen, Germany.

  1. The authors are indebted to the Ministry of Science and Environment Protection of the Republic of Serbia for financial support.

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Received: 2005-01-13
Accepted: 2005-07-02
Published Online: 2022-02-02

© 2005 Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Frontmatter
  2. Articles Basic
  3. Kinetics of crystallization of amorphous Mg80Cu10Y10
  4. Thermodynamic description of the Al–Fe–Mg–Mn–Si system and investigation of microstructure and microsegregation during directional solidification of an Al–Fe–Mg–Mn–Si alloy
  5. Effect of Ca addition on precipitation in the Pb-4 wt.% Sn alloy
  6. Binary phase diagrams of the rare earth metals with zinc: the Tb–Zn, Ho–Zn and Er–Zn systems
  7. SEM study on the M7C3 carbide nucleation during eutectic solidification of high-chromium white irons
  8. Manifestations of dynamic strain ageing in 2090 Al–Li alloy
  9. Articles Applied
  10. Study on susceptibility of Al–Si alloy castings to surface refinement with TIG arc
  11. Grain refinement of an AZ63B magnesium alloy by an Al–1C master alloy
  12. Retrogression, reaging, and mechanical behaviour of a 1441 Al–Li–Cu–Mg–Zr alloy
  13. The variation of microstructure by α–β forging and its effect on the strength and ductility in Ti–6Al–4V alloy
  14. Interfacial reaction and shear strength of Sn–0.7Cu solder/electrolytic Ni joints with reflow time
  15. Effect of niobium on the mechanical properties of powder-metallurgy processed high-speed steels
  16. High temperature behaviour of H13 steel
  17. Notifications/Mitteilungen
  18. Personal/Personelles
  19. Conferences/Konferenzen
https://doi.org/10.3139/ijmr-2005-0239
Schlagwörter für diesen Artikel
Dynamic strain ageing; 2090 Al – Li alloy; Serrated yielding; Negative strain rate sensitivity; Dislocation substructure

Artikel in diesem Heft

  1. Frontmatter
  2. Articles Basic
  3. Kinetics of crystallization of amorphous Mg80Cu10Y10
  4. Thermodynamic description of the Al–Fe–Mg–Mn–Si system and investigation of microstructure and microsegregation during directional solidification of an Al–Fe–Mg–Mn–Si alloy
  5. Effect of Ca addition on precipitation in the Pb-4 wt.% Sn alloy
  6. Binary phase diagrams of the rare earth metals with zinc: the Tb–Zn, Ho–Zn and Er–Zn systems
  7. SEM study on the M7C3 carbide nucleation during eutectic solidification of high-chromium white irons
  8. Manifestations of dynamic strain ageing in 2090 Al–Li alloy
  9. Articles Applied
  10. Study on susceptibility of Al–Si alloy castings to surface refinement with TIG arc
  11. Grain refinement of an AZ63B magnesium alloy by an Al–1C master alloy
  12. Retrogression, reaging, and mechanical behaviour of a 1441 Al–Li–Cu–Mg–Zr alloy
  13. The variation of microstructure by α–β forging and its effect on the strength and ductility in Ti–6Al–4V alloy
  14. Interfacial reaction and shear strength of Sn–0.7Cu solder/electrolytic Ni joints with reflow time
  15. Effect of niobium on the mechanical properties of powder-metallurgy processed high-speed steels
  16. High temperature behaviour of H13 steel
  17. Notifications/Mitteilungen
  18. Personal/Personelles
  19. Conferences/Konferenzen
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