Temperature-dependent constitutive behavior with consideration of microstructure evolution for as-quenched Al-Cu-Mn alloy

Wenguang Wang, Gang Wang, Yisen Hu, Guannan Guo, Tingting Zhou, Yiming Rong

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

It is difficult to predict the deformation behavior of Al-Cu-Mn alloy during a quenching process due to the complex hardening mechanisms. In this paper, isothermal tensile tests were conducted under controlled experimental conditions (298–773 K and 0.001–0.1/s strain rate). Observations on the microstructure of the alloy and tensile test analyses on stress-strain curves both verified that the deformation mechanisms differed drastically at 298–473 K and 573–773 K. Therefore, a temperature-dependent constitutive model was established to characterize the divergent flow behaviors of as-quenched Al-Cu-Mn alloy. In addition, the activation energy, Q, in the model is determined by the combined effect of dislocation forests and precipitate phases, various with different experimental conditions.

Original languageEnglish (US)
Pages (from-to)85-92
Number of pages8
JournalMaterials Science and Engineering A
Volume678
DOIs
StatePublished - Dec 15 2016

Keywords

  • Activation energy
  • Arrhenius model
  • As-quenched Al-Cu-Mn alloy
  • Dislocation forest
  • Precipitation

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