Journal of
Engineering and Technology Research

  • Abbreviation: J. Eng. Technol. Res.
  • Language: English
  • ISSN: 2006-9790
  • DOI: 10.5897/JETR
  • Start Year: 2009
  • Published Articles: 183

Full Length Research Paper

The influence of transient strain rate deformation on the microstructure of AA2024 aluminum alloy in the low temperature range

G. R. Ebrahimi1 and H. Arabshahi2*
  1Metallurgy and Materials Engineering Department, Sabzevar Tarbiat Moallem University, Sabzevar, Iran. 2Physics Department, Ferdowsi University of Mashhad, Mashhad, Iran.
Email: [email protected]

  • Article Number - B2B1DA710712
  • Vol.3(2), pp. 22-25, February 2011
  •  Accepted: 24 December 2010
  •  Published: 28 February 2011

Abstract

 

Constant and varying strain rate deformation conditions have been applied to AA2024 aluminum alloy using hot compression testing in the temperature range of 200-300°C. The initial strain rate of 0.1 s-1 and the second pass strain rate of 0.0001, 0.001 and 0.01 s-1 have been applied and tested. This research shows that in low temperature range with decreasing strain rate in the second pass, the straining hardening rate is increased. Increasing the strain rate and deformation leads to restoration processes and dynamic coarsening. Decreasing strain rate during the second pass straining increases the mobile dislocation density.

 

Key words: Strain rate, hardening, deformation, dislocation density.

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