Details

Autor(en) / Beteiligte

• Wang, Xiao-Ya
• Jiang, Jian-Tang
• Li, Guo-Ai
• Wang, Xiao-Ming
• Sun, Jian
• Zhen, Liang

Titel

Effects of coarse Al2CuLi phase on the hot deformation behavior of Al–Li alloy

Ist Teil von

• Journal of alloys and compounds, 2020-01, Vol.815, p.152469, Article 152469

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The effects of coarse T1 phase (Al2CuLi), produced by homogenization, on the hot deformation behavior of Al–Li alloy was studied using uniaxial compression. Stress-strain curves, constitutive equations and processing maps were established, and the microstructure was observed by EBSD, SEM and TEM. The homogenized alloy with coarse T1 phase presents lower flow stresses and significantly lower deformation activation energy than the solution treated alloy. Besides, the homogenized alloy exhibits the same hot-working region with the solution treated alloy, and possesses lower power dissipation efficiencies. The EBSD investigation confirms the formation of massive recrystallized grains in the homogenized alloy at 340–460 °C, revealing the coarse T1 phase can promote dynamic recrystallization through particles stimulated nucleation. In contrast, the solution treated alloy is softened dominantly via dynamic recovery at 340–490 °C. This work not only merits the beneficial effects of the coarse T1 phase but also suggests the feasibility of obtaining accelerated recrystallization kinetic and good workability during hot working of Al–Li alloys. •Coarse T1 phase lowers deformation resistance and improves workability of Al-Li alloy.•Dynamic recrystallization is highly promoted in Al–Li alloy by coarse T1 phase.•Processing maps with and without coarse T1 phase are constructed.