Effect of Intermediate Thermomechanical Treatment on Microstructure and Mechanical Properties of 2A97 Al-Li Alloy

Abstract:

Effect of intermediate thermomechanical treatment on tensile properties at short-transverse direction, fracture mechanism and microstructure of 2A97 Al-Li alloy thick plate were studied by tensile testing, SEM, EBSD and TEM.The results show that with the increasing of compression deformation, the strength and elongation of the alloy increase first and then decrease slightly. The fracture mode of the alloy changes from quasi-cleavage fracture to high energy ductile fracture. When the compression deformation rises to 20%, the elongated structure are replaced by a more uniform and equiaxial structure. The distribution of δ phase distribute more homogeneously in the grains.

• Periodical: Materials Science Forum (Volume 960)
• Pages: 70-77
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.960.70
• Online since: June 2019
• Authors: Juan Yu*, Zheng Lu, Yan Cai Xiong, Guo Ai Li, Zhao Hui Feng
• Keywords: 2A97 Al-Li Alloy, Compression Deformation, Microstructure, Recrystallization, Tensile Property

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