A Non-destructive Strain and Phase Investigation of a Friction Stir Weld Joint between an Al-base Metal Matrix Composite and a Monolithic Al Alloy Using Synchrotron Radiation

In this experiment, Friction stir process (FSP) was attempted to incorporate micron-sized SiC particles 20μm in average size into the commercially AA6061-T6 to form surface particulate metal matrix composite. Micro structure observations were carried out by scanning electron microscope (SEM) in the nugget zone. Mechanical properties include micro hardness behavior and tensile properties were evaluated. From the results, SEM micro structure shows that the SiC particles are uniformly distributed in nugget zone without any defect. The micro hardness of nugget zone with SiC particles is higher than the as-received Al alloy. Tensile properties of the FSPed composite were reduced as compared to the as-received Al alloy.

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An appraisal of characteristic mechanical properties and microstructure of friction stir welding for Aluminium 6061 alloy – Silicon Carbide (SiCp) metal matrix composite

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.13.4.2019.07.0463 ◽

2019 ◽

Vol 13 (4) ◽

pp. 5804-5817

Author(s):

Ibrahim Sabry

Keyword(s):

Tensile Strength ◽

Ultimate Tensile Strength ◽

Metal Matrix Composite ◽

Matrix Composite ◽

Metal Matrix ◽

Welded Joint ◽

Rotation Speed ◽

Fusion Welding ◽

Friction Stir ◽

Al 6061

It is expected that the demand for Metal Matrix Composite (MMCs) will increase in these applications in the aerospace and automotive industries sectors, strengthened AMC has different advantages over monolithic aluminium alloy as it has characteristics between matrix metal and reinforcement particles. However, adequate joining technique, which is important for structural materials, has not been established for (MMCs) yet. Conventional fusion welding is difficult because of the irregular redistribution or reinforcement particles. Also, the reaction between reinforcement particles and aluminium matrix as weld defects such as porosity in the fusion zone make fusion welding more difficult. The aim of this work was to show friction stir welding (FSW) feasibility for entering Al 6061/5 to Al 6061/18 wt. % SiCp composites has been produced by using stir casting technique. SiCp is added as reinforcement in to Aluminium alloy (Al 6061) for preparing metal matrix composite. This method is less expensive and very effective. Different rotational speeds,1000 and 1800 rpm and traverse speed 10 mm \ min was examined. Specimen composite plates having thick 10 mm were FS welded successfully. A high-speed steel (HSS) cylindrical instrument with conical pin form was used for FSW. The outcome revealed that the ultimate tensile strength of the welded joint (Al 6061/18 wt. %) was 195 MPa at rotation speed 1800 rpm, the outcome revealed that the ultimate tensile strength of the welded joint (Al 6061/18 wt.%) was 165 MPa at rotation speed 1000 rpm, that was very near to the composite matrix as-cast strength. The research of microstructure showed the reason for increased joint strength and microhardness. The microstructural study showed the reason (4 %) for higher joint strength and microhardness. due to Significant of SiCp close to the boundary of the dynamically recrystallized and thermo mechanically affected zone (TMAZ) was observed through rotation speed 1800 rpm. The friction stir welded ultimate tensile strength Decreases as the volume fraction increases of SiCp (18 wt.%).

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A study on the microstructure, hardness, and tribological behavior of aluminum-based metal–matrix composite fabricated through recursive friction stir processing

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

10.1177/1464420720976686 ◽

2020 ◽

pp. 146442072097668

Author(s):

G Girish ◽

V Anandakrishnan

Keyword(s):

Metal Matrix Composite ◽

Matrix Composite ◽

Friction Stir Processing ◽

Metal Matrix ◽

Applied Load ◽

Tribological Behavior ◽

Testing Conditions ◽

Friction Stir ◽

The Matrix ◽

Microstructure Examination

In this work, an Al–Zn–Mg–Cu/TiC metal–matrix composite was fabricated through recursive friction stir processing, and its microstructure, hardness, and tribological properties were investigated. Microstructure examination revealed a homogeneous dispersion of TiC particles in the matrix after six recursive passes. The grains were significantly refined and microhardness of the composite improved due to the presence of TiC particles. Friction coefficient and wear rate of the composite went up with an increase in the applied load and dropped significantly at higher sliding velocities. The morphology of the wear specimens experimented under different testing conditions was analyzed and the corresponding wear mechanisms discussed.

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Post-Processing of Stir Casted Al–Si12Cu Metal Matrix Composite by Friction Stir Processing

International Journal of Metalcasting ◽

10.1007/s40962-021-00737-x ◽

2022 ◽

Author(s):

Vipin Sharma ◽

Suresh Kumar ◽

Yogesh Dewang ◽

Pardeep Kumar Nagpal

Keyword(s):

Metal Matrix Composite ◽

Matrix Composite ◽

Friction Stir Processing ◽

Metal Matrix ◽

Post Processing ◽

Friction Stir

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Friction Stir Processing of Hybrid Al-Si Alloy Metal Matrix Composite

10.21203/rs.3.rs-521330/v1 ◽

2021 ◽

Author(s):

Vipin Sharma ◽

Yogesh Dewang ◽

Pardeep Kumar Nagpal ◽

Suresh Kumar

Keyword(s):

Metal Matrix Composite ◽

Metal Matrix Composites ◽

Matrix Composite ◽

Friction Stir Processing ◽

Metal Matrix ◽

Full Potential ◽

Matrix Composites ◽

Friction Stir ◽

Zircon Sand ◽

Sand Particles

Abstract Metal matrix composites are an important class of material that is developing rapidly to fulfil the diversified engineering requirements. The metal matrix composites are attractive owing to superior properties as compared to monolithic material. Their properties are dependent on various factors and fabrication techniques. The metal matrix composites are associated with several issues which hinder their full potential. In the present study friction stir processing is applied on the metal matrix composite as a post-processing operation. The friction stir processing offers many advantages owing to the solid-state nature of the processing. Stir cast metal matrix composites are prepared by using zircon sand particles of 50 µm in the matrix of LM13 aluminium alloy. The friction stir processing is applied on the metal matrix plates at a constant rotational speed and traverse speed of 1400 rpm and 63 mm/min, respectively. Multiple passes of friction stir processing are applied to elucidate the effect of the number of passes on microstructural modification. Microstructural examination showed a significant improvement in eutectic silicon morphology and distribution of zircon sand particles. A more than 5 times reduction as compared to the initial size was observed in the zircon sand particles after four passes of friction stir processing. The processed metal matrix composite also exhibits improvement in tensile strength and hardness.

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