Material flow behavior and microstructural refinement of AA6061 alloy during friction extrusion

被引：7

作者：

Kalsar, Rajib ^{[1
]}

Overman, Nicole ^{[1
]}

Darsell, Jens ^{[1
]}

Escobar, Julian ^{[1
]}

Li, Lei ^{[1
]}

Wang, Tianhao ^{[1
]}

Ma, Xiaolong ^{[1
]}

Soulami, Ayoub ^{[1
]}

Herling, Darrell ^{[1
]}

Joshi, Vineet V. ^{[1
]}

机构：

[1] Pacific Northwest Natl Lab, Energy & Environm Directorate, 902 Battelle Blvd, Richland, WA 99354 USA

来源：

MATERIALS CHARACTERIZATION | 2024年 / 208卷

关键词：

Friction extrusion (FE); AA6061; alloy; Microstructure; Material flow; Smoothed particle hydrodynamics (SPH); simulation; MG-SI ALLOYS; MECHANICAL-PROPERTIES; STIR EXTRUSION; AL; TEXTURE; DISSOLUTION; PARAMETERS; SIMULATION; EVOLUTION;

D O I：

10.1016/j.matchar.2024.113636

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work we used friction extrusion (FE), a solid phase processing technique, to produce dense, fully consolidated 5 mm rods of aluminum alloy 6061 (AA6061). The combination of large shear stresses and high temperatures at the tool-billet interface during extrusion produced equiaxed, dynamically recrystallized grains and finely distributed precipitates. Texture and microstructure evolution during extrusion was investigated in detail using scanning electron microscopy, electron backscatter diffraction, and transmission electron microscopy. Smoothed particle hydrodynamics simulation was performed to study complex material flow during extrusion. Simulation results suggest spiral material flow during extrusion which corroborated experimental results. Advantages of friction extruded microstructure over conventionally extruded counterparts are also explored using flash annealing for solution treatment followed by artificial aging. Mechanical properties of the as-friction extruded, and the artificially aged specimens were evaluated using tensile testing and compared with conventional extruded material properties.

引用

页数：11

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