Eutectic Al–Si piston alloy surface transformed to modified hypereutectic alloy via FSP

Tutunchilar, S.; Givi, Mohammad Kazem Besharati; Haghpanahi, Mohammad; Asadi, Parviz

doi:10.1016/j.msea.2011.12.008

Cited by 62 publications

(33 citation statements)

References 39 publications

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“…The first pass noticed that, it is insufficient to improve the mechanical properties because some voids or defects are remained in the matrix. These results are in accordance to the previous results [ 27,28,29,30 ]. Enhanced results for these metal matrixes composite are obtained at relatively low speeds with 10 mm/min and 15 mm/min traverse speed as shown in " Fig.…”

Section: Results and Discussion:-supporting

confidence: 94%

Effect of Friction Stir Processing Parameters on the Tensile Strength of Surface Composite Aluminum Alloy.

Moustafa¹,

Mohammed²,

Abdel-Wanis³

et al. 2017

IJAR

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In the current study, the surface composite sheet of AA2024/al203 has been fabricated using friction stir processing technique. The processing parameters during fabrication process; such as rotation speed, travel speed and number of passes have been investigated. The number of passes has a significant effect on the mechanical properties through tensile test. The results revealed that tensile strength improved with increasing passes number.Copy Right, IJAR, 2016,. All rights reserved. …………………………………………………………………………………………………….... Introduction:-Increasing demand for improving the properties of surfaces in order to meet with design and functional requirements. Friction stir processing (FSP) is one of the techniques for fabricating surface composites and modifying microstructural features, furthermore the improvement of mechanical properties. Process parameters are the key art of Friction Stir Processing. The stirring conditions (rotational and translational speeds) are important issues in FSP to obtain the desired mechanical properties.Many researchers were discussed the relation between the process parameters and the quality of welded or processed metals according to [ 1,2,3,4 ]. The Tensile strength is found to be increased with increasing the rotational speed up to specified limit for AA6351 Al alloys as reported by [ 5 ].The tensile properties and fracture locations have been investigated by many authors [ 6,7,8 ] they are fabricated metal sheets alloy using FSP. The results are revealed that the rotational speed has a significant influence on the tensile strength as a result of improving grain refinement of the material. The mechanisms of particle refinement during FSP of pure Al, and the effect of various processing parameters on the particle refinement have been studied by [ 9 ]. The investigators reported, that amount of heat generation during FSP was increased when rotational speed increase and decrease when transverse speed increase. Fabricating AA1050/SiC surface composite using FSP technique has been investigated by [ 10 ] the author concluded that , the formation of defects are causing at higher tool rotational speeds. The surface composite sheets are investigated by [ 11,12,13,14,15,16 ], they are concluded that tool rotation speed has a major effect on the mechanical properties and microstructure refinement.The effect of multi-pass FSP on the, microstructure, micro hardness and tensile strength on the metal alloy and composites have been studied by [ 17,18,19,20,21,22 ].Multi pass FSP not only improve the mechanical properties , but also get defect-free weld through adjusting the Welding parameters, including tool rotation rate, traverse speed, spindle tilt angle, and target depth [ 23 ] . multi-pass with even step (2, 4 up to 8-pass) FSP with 100% overlap was performed by [ 24 ] The results reported that multi-pass FSP were improved tensile properties of composites including UTS, yield strength (YS) and elongation. The authors were reasoned this improvement because of reduced

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Section: Results and Discussion:-supporting

confidence: 94%

Effect of Friction Stir Processing Parameters on the Tensile Strength of Surface Composite Aluminum Alloy.

Moustafa¹,

Mohammed²,

Abdel-Wanis³

et al. 2017

IJAR

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“…Applying FSP to the as-cast LM 13 Al alloy, it decreases the brittleness significantly and after each pass of FSP the ductility increases as reported by Tutinchilar et al [19]. Yadav et al [20] analyzed the effect of friction stir processing on the microstructure and the mechanical properties of aluminum.…”

Section: Introductionmentioning

confidence: 85%

“…Ranjit et al [21] observed that in a two-pass FSP of Al-TiC in situ composite, the grain size was refined substantially after each FSP pass. Silicon particle reduces considerably, as the pass number increases [19]. Similarly, Nakata et al [15] produced a fine grain structure of 2-3 lm in ADC12 die casting alloy via multi-pass FSP.…”

Section: Effect Of Multi-pass Fsp On Microstructurementioning

confidence: 97%

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

Baruch¹,

Ramesh

Balasubramanian

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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The influence of overlap multi-pass friction stir processing on the microstructure and the mechanical properties, in particular, strength, ductility and hardness of die cast Al-7Si-3Cu aluminum alloy was investigated. It was observed that increase in the number of overlap passes friction stir processing resulted in significant refinement and redistribution of aluminum silicon eutectic phase and elimination of casting porosities. The microstructural refinement by the friction stir processing not only increases the ultimate tensile strength from 121 to 273 MPa, but also increases the ductility as observed by the increase in fracture strain from 1.8% to 10%. Analysis of the fractured surface reveals that the microstructural refinement obtained by friction stir processing plays a vital role in transforming the fracture mode from completely mixed mode to the ductile mode of the fracture with increasing number of passes. The change in the size, shape, morphology and distribution of eutectic silicon particles and elimination of the porosities are the main reasons for the increases in tensile strength and ductility due to friction stir processing.

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“…It is clear that by increasing the traverse speed, the average grain size reduces. Indeed, increase in w/v results in a rise in the amount of generated heat and peak temperature, leading to acceleration of grain growth step, and thus, the final microstructure will contain larger grains (Salekrostam et al 2010;Tutunchilar et al 2012b). …”

Section: Microstructure Evolution During Fswmentioning

confidence: 99%

Microstructural simulation of friction stir welding using a cellular automaton method: a microstructure prediction of AZ91 magnesium alloy

Asadi

Givi

Akbari

2015

Int J Mech Mater Eng

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Background: Recently, some researchers have simulated FSW using FEM and studied the influence of process parameters and tool geometry on material flow, welding force, and temperature and strain distributions during friction stir processing. Additionally, in terms of microstructure modeling, various approaches such as the Cellular Automaton (CA) model have been developed to simulate microstructural evolution during plastic deformation processes. Method: In this work, a finite element model (FEM) is established to study the microstructure evolution during friction stir welding (FSW) of AZ91 magnesium alloy. To this aim, first, the hot compression tests at different temperatures and strain rates were carried out to achieve the flow stress curves. Then, the hardening parameter, the recovery parameter and the strain rate sensitivity were calculated according to flow stress results and using the Kocks−Mecking model. Next, a continuum based thermo-mechanically coupled rigid-viscoplastic FEM model was proposed in Deform-3D software to simulate the FSW of AZ91 magnesium alloy. To evaluate microstructure of the weld zone a model is proposed based on the combination of Cellular Automaton and Laasraoui-Jonas models.

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Eutectic Al–Si piston alloy surface transformed to modified hypereutectic alloy via FSP

Cited by 62 publications

References 39 publications

Effect of Friction Stir Processing Parameters on the Tensile Strength of Surface Composite Aluminum Alloy.

Effect of Friction Stir Processing Parameters on the Tensile Strength of Surface Composite Aluminum Alloy.

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

Microstructural simulation of friction stir welding using a cellular automaton method: a microstructure prediction of AZ91 magnesium alloy

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