Influence of Multi-pass Friction Stir Processing on Microstructure and Mechanical Properties of Die Cast Al–7Si–3Cu Aluminum Alloy

Baruch, Limor; Ramesh, R.; Balasubramanian, V.; Rao, A. Gourav; Dinaharan, I.

doi:10.1007/s40195-016-0405-2

Cited by 25 publications

(10 citation statements)

References 27 publications

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“…Baruch et al 11 investigated the effect of multi-pass FSP on the microstructure and mechanical properties of the AS7U3G cast alloy. They reported that the hardness of the FSP specimens was lower than that of the as-cast alloy.…”

Section: Introductionmentioning

confidence: 99%

Wear and mechanical properties of surface hybrid metal matrix composites on Al–Si aluminum alloys fabricated by friction stir processing

Akbari

Shojaeefard

Asadi

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part L:

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Aluminum-base surface hybrid composites have been fabricated by mixtures of SiO2 and Al2O3 particles on an Al–Si cast aluminum alloy using friction stir processing with the aim of achieving higher wear properties in the Al piston alloy via surface hybrid composites fabrication. The distribution of particles in the stir zone was evaluated via scanning electron microscope. Microstructures of the composites revealed that the reinforcing particles were uniformly distributed in the stir zone. Furthermore, the mechanical properties of each composite were determined using hardness tests indicating that increase in the relative content of SiO2 resulting in a decrease in the average hardness of the stir zone. Additionally, the wear resistance of the surface hybrid composites was investigated under normal load, sliding speed, and distances of 20 N, 1 m/s, and 4000 m, respectively. It was found that the wear mass loss of the 20% SiO2–80% Al2O3 hybrid composites (which was about 4.2 mg) was improved when compared with that of the A356 base alloy (nearly 19 mg). Moreover, by increasing the relative content of SiO2 particles from 0% to 100% in the hybrid composites, the friction coefficient of the composites rose from 0.55 to 0.73. It can be concluded by adding Al2O3 and SiO2 particles in the Al matrix, wear mass loss can be decreased by about five times compared with that of the base metal, in which the Al2O3 particle increases the hardness and SiO2 particles acts as lubricating agent, and the combination of these leads to better wear properties. The best combination of the hybrid particles in order to achieve the best wear properties for the hybrid composites is 20% Al2O3 and 80% SiO2.

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Section: Introductionmentioning

confidence: 99%

Wear and mechanical properties of surface hybrid metal matrix composites on Al–Si aluminum alloys fabricated by friction stir processing

Akbari

Shojaeefard

Asadi

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Both strength and ductility were enhanced as the grain size reduces. [10][11][12] For the refinement of primary Si, various microstructural refinement techniques were used by the researchers in the as-cast Al-Si alloys, which includes melt modification, [13][14][15][16][17][18] spray forming, 19,20 friction stir processing (FSP), 2,21,22 and squeeze casting. 23 After examining the research papers, the effect of microstructural refinement due to a reduction in primary silicon particles on tensile properties is tabulated in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Ductilizing of cast hypereutectic Al–17%Si alloy by friction stir processing

Saini

Pandey

Dwivedi

2017

Proceedings of the Institution of Mechanical Engineers, Part E:

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In present research work, multi-pass friction stir processing was utilized for the as-cast Al-17%Si alloy. The multi-pass friction stir processing reproduced the aluminum (Al) matrix with a uniform distribution of the ultra-fine silicon (Si) particles. The multi-pass friction stir processing also resulted in the formation of refining cast microstructure with negligible porosity. The significant reduction in silicon particle size was measured and it reduced from 204 mm to 0.86 mm after the first pass and up to 0.30 mm after two pass friction stir processing. The frequency of fine Si particles was increased after two pass friction stir processing as compared to single pass friction stir processing. The engineering stress-strain curves revealed a significant enhancement in ductility and strength after one and two passes of friction stir processing as compared to the as-cast alloy. After one and two passes of friction stir processing, the ultimate tensile strength of as-cast alloy was enhanced by 24% and 31% and ductility was increased by 300% and 500%, respectively. The secondary electron micrograph of fracture surfaces of tensile specimens was taken before and after friction stir processing. The fractographs revealed the transformation from brittle mode to ductile dimples fracture after the multi-pass friction stir processing process.

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“…The refined grain of surface composites enhanced corrosion resistance, hardness and wear resistance properties. It was reported that ultrafine structure formed surrounding the rotating tool pin due to the deformation field generated for this reason [60][61][62]. The FSP pass affects the grain structure of the surface composite.…”

Section: Effects Of Number Of Fsp Passesmentioning

confidence: 99%

Friction stir process: a green fabrication technique for surface composites—a review paper

Gupta

2020

SN Appl. Sci.

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In many applications, surface properties of materials or components are more important than the entire volume material properties. The hardness, wear and corrosion resistance of material mainly depends on the surface properties. Improved surface properties also increased the life span of components. The friction stir process is a novel solid-state processing technique that is widely used for welding difficult-to-weld materials. In this paper, the applications of the friction stir process in surface modifications and fabrication of aluminum matrix surface composites were discussed. The effects of friction stir process parameters, tool design, reinforcement and reinforcement techniques on the surface properties were also reported.

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Influence of Multi-pass Friction Stir Processing on Microstructure and Mechanical Properties of Die Cast Al–7Si–3Cu Aluminum Alloy

Cited by 25 publications

References 27 publications

Wear and mechanical properties of surface hybrid metal matrix composites on Al–Si aluminum alloys fabricated by friction stir processing

Wear and mechanical properties of surface hybrid metal matrix composites on Al–Si aluminum alloys fabricated by friction stir processing

Ductilizing of cast hypereutectic Al–17%Si alloy by friction stir processing

Friction stir process: a green fabrication technique for surface composites—a review paper

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