Details

Autor(en) / Beteiligte

• Jiang, Tao
• Jiao, Tao
• Dai, Guoqing
• Shen, Zhikang
• Guo, Yanhua
• Sun, Zhonggang
• Li, Wenya

Titel

Microstructure evolution and mechanical properties of 2060 Al-Li alloy via friction stir additive manufacturing

Ist Teil von

• Journal of alloys and compounds, 2023-02, Vol.935, p.168019, Article 168019

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Aluminum has low evaporation temperature and high reactivity with oxygen, and it could cause a lot of challenges during traditional melt-based additive manufacturing (AM) process. However, as a solid-state technology, friction stir additive manufacturing (FSAM) is expected to avoid the melting-solidification during entire manufacturing and solve these defects eventually. In this study, the microstructure evolution and mechanical properties of 2060 aluminum lithium alloy manufactured via FSAM were carried out at various process parameters. The results indicate that the best combined parameter could be obtained at rotational speed as 1600 r/min, translational speed as 300mm/min and splice rate as 80%. Due to dynamic recrystallization from plastic deformation and heat input, finer equiaxed grains with size between 2-5μm could be obtained in the nugget zone and a maximum microhardness could reach 135 HV. •The metallurgical defects arising from traditional melt-based additive manufacturing of aluminum-lithium alloys have been effectively solved by friction stir additive manufacturing.•The influence of process parameters on microstructure and microhardness provided the basis for subsequent friction stir additive manufacturing of aluminum-lithium alloys.•The dynamic recrystallization caused by plastic deformation and heat input resulted in a fine equiaxial microstructure.