Surface coating (Al/Cu &amp;Al/SiC) fabricated by direct particle injection tool for friction stir processing: Evolution of phases, microstructure and mechanical properties

Muthukumar, P.; Jerome, S.

doi:10.1016/j.surfcoat.2019.02.084

Cited by 8 publications

(2 citation statements)

References 26 publications

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“…In overall, clear and healthy interface is formed between the matrix and composite layer in the optimized specimens with no evidence of intermetallics (figure 14). The intermetallics are not formed at the processing temperature of around 327 °C [37,38].…”

Section: Microstructural Observationsmentioning

confidence: 99%

Optimization of friction stir process parameters for fabrication of AA7075/TiO₂ based surface composites

Suganeswaran¹,

Nithyavathy²,

Parameshwaran³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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In this current investigation, Taguchi method is employed for the improvement of hardness and tensile strength of Friction Stir Processed (FSP) AA7075 with TiO2 reinforcement, which is potentially suited for manufacturing of components in automotive and aerospace applications. Controllable FSP process parameters like Rotational Speed (RS), Traverse Speed (TS), Tool Tilt Angle (TA) and number of passes (No. of pass) are taken into consideration. From Taguchi results, it is identified that No of pass as two, RS as 1400 rpm, TS as 28 mm min−1 and TA as 2° serves the most influencing statistical effect for yielding the hardness. Similarly for Ultimate Strength (UTS), it is identified that No of pass as one, RS as 1400 rpm, TS as 28 mm min−1 and TA of 3° are the influencing parameters. No defect like structure is apparent in the optimized specimens owing to the sufficient heat generation and stirring phenomenon. Besides, sufficient interaction between the plasticized AA7075 matrix and packed TiO2 particles in the SC eliminates the defect formation. Micrographs of the optimized specimens revealed that TiO2 particles are dispersed uniformly in AA7075 matrix with clear interface. Moreover, there is an increase in microhardness for optimized specimen compared to base specimen due to reduced grain size value and homogenous dispersion strengthening mechanism. Meanwhile, the load bearing capacity and work hardening action of TiO2 dispersoids enhances the UTS behavior of the optimized specimen.

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Section: Microstructural Observationsmentioning

confidence: 99%

Optimization of friction stir process parameters for fabrication of AA7075/TiO₂ based surface composites

Suganeswaran¹,

Nithyavathy²,

Parameshwaran³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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show abstract

“…An in situ surface composite was produced by smearing the aluminum surface with reinforcement SiC particles and methanol and applying FSP to produce a surface composite layer. Since then, different methods for adding reinforcement particles have been reported [4,12,[19][20][21][22][23][24]. For example, several studies proposed a new FSP method for making in situ composites, known as the groove method, by filling the reinforcement particles into a machined groove in the base material's top surface using FSP [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

A New Approach to Direct Friction Stir Processing for Fabricating Surface Composites

2021

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Friction stir processing (FSP) is a green fabrication technique that has been effectively adopted in various engineering applications. One of the promising advantages of FSP is its applicability in the development of surface composites. In the current work, a new approach for direct friction stir processing is considered for the surface fabrication of aluminum-based composites reinforced with micro-sized silicon carbide particles (SiC), eliminating the prolonged preprocessing stages of preparing the sample and filling the holes of grooves. The proposed design of the FSP tool consists of two parts: an inner-threaded hollow cylindrical body; and a pin-less hollow shoulder. The design is examined with respect to three important tool processing parameters: the tilt angle of the tool, the tool’s dispersing hole, and the tool’s plunge depth. The current study shows that the use of a dispersing hole with a diameter of 6 mm of and a plunge depth of 0.6 mm, in combination with a tilting angle of 7°, results in sufficient mixing of the enforcement particles in the aluminum matrix, while still maintaining uniformity in the thickness of the composite layer. Metallographic examination of the Al/SiC surface composite demonstrates a uniform distribution of the Si particles and excellent adherence to the aluminum substrate. Microhardness measurements also show a remarkable increase, from 38.5 Hv at the base metal to a maximum value of 78 Hv in the processed matrix in the surface composites layer. The effect of the processing parameters was also studied, and its consequences with respect to the surface composites are discussed.

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Equipment Used DuringFSP

Suganeswaran,

Nithyavathy,

Muthukumar

et al. 2024

Friction Stir Welding and Processing

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Surface coating (Al/Cu &Al/SiC) fabricated by direct particle injection tool for friction stir processing: Evolution of phases, microstructure and mechanical properties

Cited by 8 publications

References 26 publications

Optimization of friction stir process parameters for fabrication of AA7075/TiO₂ based surface composites

Optimization of friction stir process parameters for fabrication of AA7075/TiO₂ based surface composites

A New Approach to Direct Friction Stir Processing for Fabricating Surface Composites

Equipment Used DuringFSP

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Surface coating (Al/Cu &Al/SiC) fabricated by direct particle injection tool for friction stir processing: Evolution of phases, microstructure and mechanical properties

Cited by 8 publications

References 26 publications

Optimization of friction stir process parameters for fabrication of AA7075/TiO2 based surface composites

Optimization of friction stir process parameters for fabrication of AA7075/TiO2 based surface composites

A New Approach to Direct Friction Stir Processing for Fabricating Surface Composites

Equipment Used DuringFSP

Contact Info

Product

Resources

About

Optimization of friction stir process parameters for fabrication of AA7075/TiO₂ based surface composites

Optimization of friction stir process parameters for fabrication of AA7075/TiO₂ based surface composites