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Effect of strain rate and dynamic strain ageing on work-hardening for aluminium alloy AA5182-O

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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 8

Abstract

The work-hardening of the solution-strengthened aluminium alloy AA5182-O is studied as a function of strain rate at room temperature. The main aim is to characterize the influence of strain rate and dynamic strain ageing on the work-hardening of the material. Tensile tests with constant nominal strain rates in the range from 10−6 to 1 s−1 were carried out; additionally, strain-rate jump tests were performed. The material exhibits a sharp yield point, a Lüders plateau, and serrated yielding within the actual range of strain rates. This indicates that the steady-state strain rate sensitivity is negative as a result of dynamic strain ageing. The serrations in the stress–strain curves and the work-hardening are markedly reduced with increasing strain rates. In most cases, the jump tests exhibit the standard behaviour, i.e., after a transient period following the jump in strain rate, the stress–strain curve converges to the steady-state stress–strain curve at the new strain rate.

Keywords: Steady-state tests; Strain-rate jump tests; Serrated yielding
1 Correspondence address: Professor Odd-Geir Lademo, SINTEF Materials and chemistry, Richard Birkelandsvei 2, 7465 Trondheim, Norway, Tel.: + 47 920 52 901, E-mail:

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Received: 2010-11-5
Accepted: 2012-1-18
Published Online: 2013-06-11
Published in Print: 2012-08-01

© 2012, Carl Hanser Verlag, Munich

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https://doi.org/10.3139/146.110741
Keywords for this article
Steady-state tests; Strain-rate jump tests; Serrated yielding

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. A new editor for IJMR and other changes
  5. ECAA 2011
  6. Proceeding Papers
  7. A model for co-clusters and their strengthening in Al–Cu–Mg based alloys: a comparison with experimental data
  8. Effect of room temperature storage time on precipitation in Al–Mg–Si(–Cu) alloys with different Mg/Si ratios
  9. Influence of Mg/Si ratio on the clustering kinetics in Al–Mg–Si alloys
  10. Effect of simultaneous deformation and artificial ageing on the mechanical properties of an Al–Mg–Si alloy
  11. Ab-initio modeling of metastable precipitation processes in aluminum 7xxx alloys
  12. The kinetics of clustering in Al–Mg–Si alloys studied by Monte Carlo simulation
  13. Regular Articles
  14. A physically based approach to model the incomplete bainitic transformation in high-Si steels
  15. Impact of interannealing on recrystallization during final annealing in twin-belt cast Al–Fe–Si sheet
  16. Direct preparation of ferrite magnetic material from Jinchuan nickel sulfide concentrate by acid leaching
  17. Effect of La3+ on microwave dielectric properties of (Pb1−xCax)(Fe0.5Nb0.5)O3 (x = 0.5–0.6) ceramics
  18. Thermodynamic properties of liquid copper–antimony–tin alloys determined from e.m.f. measurements
  19. Modelling of metal nano-particle condensation and growth in a reactive atmosphere
  20. Characterization and catalytic behavior of CuO@SiO2 nanocomposites towards NO oxidation and N2O decomposition
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