Numerical modeling and experimental investigation on the effect of rotation speed on microstructural evaluation and mechanical properties of copper during friction stir processing

The effect of prior constrained groove pressing on friction stir processing (FSP) of pure copper was investigated. The results illustrate the development of high strain and strength of FSP samples along with an increased strength base metal as a result of applying for a prior constrained groove pressing (CGP) pass. The influences of further FSP passes on the microstructures, and mechanical properties were also shown. The microstructural evaluation of the specimens indicated up to 10 times grain size reduction in FSP specimens as well as equiaxed microstructural morphology. Mechanical properties of the specimens were carried out through tensile and microhardness tests. It was demonstrated that the FSP could improve the strength and ductility of the specimens simultaneously through improved mechanical properties of the base metal resulting from prior CGP. The performed calculations show that values of dislocation density of the CGPed specimens experienced significant change after applying for FSP passes.

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Effects of Multi-Pass Friction Stir Processing on Microstructures and Mechanical Properties of the 1060Al/Q235 Composite Plate

Metals ◽

10.3390/met10030298 ◽

2020 ◽

Vol 10 (3) ◽

pp. 298 ◽

Cited By ~ 1

Author(s):

Jian Wang ◽

Yun Cheng ◽

Bo Li ◽

Cheng Chen

Keyword(s):

Mechanical Properties ◽

Friction Stir Processing ◽

Composite Plate ◽

Rotation Speed ◽

Composite Plates ◽

Bending Properties ◽

Friction Stir ◽

Stirring Effect ◽

The Matrix ◽

Tool Rotation

Steel cuttings, holes and cracks always exist at the interfaces in the composite plate. Multi-pass friction stir processing (M-FSP) is proposed in this research to optimize the interface microstructure and the interface connection for the 1060Al/Q235 composite plate. Results show that the microstructures of 1060Al after M-FSP are fine and uniform owing to the strong stirring effect and recrystallization. Micro-defects formed by the welding can be repaired by the M-FSP. However, tunnel defects can also be formed in the matrix of aluminum by M-FSP, especially when the passes are one and two. The melting block and the melting lump in the composite plates are easy to become the source of crack. The shear strengths and the bending properties for the 1060Al/Q235 composite plate after M-FSP are the best when the passes are three, with the tool rotation speed of 1200 rpm and the forward speed of 60 mm/min. The optimized interfaces for the composite plate after M-FSP are mainly by the metallurgical bondings, with a certain thickness and discontinuous mechanical connections. Therefore, the crack extension stress is the largest and the mechanical properties are the best.

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Effects of Multi-pass Friction Stir Processing on Microstructures and Mechanical Properties of 1060Al/Q235 Explosive Composite Plate

10.20944/preprints202001.0354.v1 ◽

2020 ◽

Author(s):

Jian Wang ◽

Yun Cheng ◽

Bo Li ◽

Cheng Chen

Keyword(s):

Mechanical Properties ◽

Friction Stir Processing ◽

Composite Plate ◽

Rotation Speed ◽

Composite Plates ◽

Interface Microstructure ◽

Bending Properties ◽

Friction Stir ◽

Stirring Effect ◽

Tool Rotation

There always exist steel cuttings, holes and cracks at the interfaces in the explosive composite plate. Multi-pass friction stir processing (M-FSP) is proposed in this research to optimize the interface microstructure and the interface connection for 1060Al/Q235 explosive composite plate. Results show that the microstructures of 1060Al after M-FSP are fine and uniform owing to the strong stirring effect and recrystallization. Micro-defects formed by the explosive welding can be repaired by the M-FSP. However, M-FSP can also form tunnel defects in the aluminum, especially when the passes are one and two. The melting block and the melting lump in the composite plates are easy to become source of crack. The shear strengths and the bending properties for the 1060Al/Q235 explosive composite plate after M-FSP are the best when the passes are three, with the tool rotation speed of 1200rpm and the forward speed of 60mm/min. The optimized interfaces for the explosive composite plate after M-FSP are mainly by the metallurgical bondings, with a certain thickness and are discontinuous. Therefore, the crack extension stress is the largest and the mechanical properties are the best.

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Microstructure and Mechanical Properties of AZ31/ZrO2 Composites Prepared by Friction Stir Processing With High Rotation Speed

Frontiers in Materials ◽

10.3389/fmats.2020.00278 ◽

2020 ◽

Vol 7 ◽

Author(s):

Qianhao Zang ◽

Xiaowen Li ◽

Hongmei Chen ◽

Jing Zhang ◽

Ling Wang ◽

...

Keyword(s):

Mechanical Properties ◽

Friction Stir Processing ◽

Rotation Speed ◽

Friction Stir ◽

Microstructure And Mechanical Properties ◽

High Rotation Speed

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Microstructure, texture evolution and mechanical properties of pure Ti by friction stir processing with slow rotation speed

Materials Characterization ◽

10.1016/j.matchar.2018.12.006 ◽

2019 ◽

Vol 148 ◽

pp. 1-8 ◽

Cited By ~ 7

Author(s):

Luyao Jiang ◽

Weijiu Huang ◽

Chenglong Liu ◽

Linjiang Chai ◽

Xusheng Yang ◽

...

Keyword(s):

Mechanical Properties ◽

Friction Stir Processing ◽

Rotation Speed ◽

Texture Evolution ◽

Slow Rotation ◽

Friction Stir

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Microstructural Evaluation and Mechanical Properties of Al1050/TiO2-Graphite Hybrid Nanocomposite Produced Via Friction Stir Processing

Metallurgical and Materials Transactions A ◽

10.1007/s11661-019-05158-4 ◽

2019 ◽

Vol 50 (5) ◽

pp. 2443-2461

Author(s):

Mohammad Farshbaf Ahmadipour ◽

Mojtaba Movahedi ◽

Amir Hossein Kokabi

Keyword(s):

Mechanical Properties ◽

Friction Stir Processing ◽

Hybrid Nanocomposite ◽

Friction Stir ◽

Microstructural Evaluation

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Production and characterization of A5083–Al2O3–TiO2 hybrid surface nanocomposite by friction stir processing

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/1464420715623977 ◽

2015 ◽

Vol 232 (4) ◽

pp. 287-293 ◽

Cited By ~ 6

Author(s):

Saeed Ahmadifard ◽

Shahab Kazemi ◽

Akbar Heidarpour

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Tensile Strength ◽

Friction Stir Processing ◽

Rotation Speed ◽

Travel Speed ◽

Hardened Steel ◽

Friction Stir ◽

Scanning Electron

In this study, the production and characterization of A5083–Al2O3–TiO2 hybrid surface nanocomposite by friction stir processing have been investigated. The effect of different ratios of nanosized Al2O3 and TiO2 particles on microstructural and mechanical properties was investigated. A threaded cylindrical hardened steel tool was used with the rotation speed of 500 r/min and travel speed of 56 mm/min and a tilt angle of 3°. Microhardness of base metal and treated surfaces as well as tensile strength was evaluated. The samples were characterized by means of optical and scanning electron microscopy. The results showed that the maximum tensile strength and hardness value were achieved for a mixture of Al2O3 and TiO2 in the ratio of 25–75, respectively. The microhardness and tensile strength were respectively increased by 50% and 182% while ductility was reduced by 60%.

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