Characterization of the Hot Deformation Behaviour of an As-Extruded Al–Cu–Li Alloy by Constitutive Analysis
- Resource Type
- Article
- Authors
- Xusheng Yang; Weijiu Huang; Xianghui Zhu; Ran Zhang; Fei Guo; Li Hu
- Source
- Metals and Materials International, 27(11), pp.4793-4801 Nov, 2021
- Subject
- 재료공학
- Language
- English
- ISSN
- 2005-4149
1598-9623
The true stress–strain curves of an as-extruded state AA2099 were determined by uniaxial compression tests under varioushot deformation regimes. Constitutive analysis of the curves allowed calculation of the hot deformation activation energy(QHW). The microstructure of the as-compressed specimens were also characterized by electron back scatter diffraction(EBSD). EBSD data analyses showed that the major restoration mechanism corresponding to common industrial extrusionregimes was dynamic recovery. The precipitates in three states (T83, as-homogenized, and as-extruded) were characterizedby X-ray diffraction (XRD) phase analyses and transmission electron microscopy. The results revealed that the QHWwasclosely relevant to the precipitates strengthening. The finite element method simulation results and the microstructure of theextruded products confirmed that AA2099 in as-extruded state possessed good workability.