Surface reinforcement of AA5083-H111 by friction stir processing assisted by electrical current

Santos, Telmo G.; Lopes, Nuno; Machado, Miguel A.; Vilaça, Pedro; Miranda, Rosa Maria Mendes

doi:10.1016/j.jmatprotec.2014.10.005

Cited by 30 publications

(15 citation statements)

References 11 publications

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“…[17][18][19][20] The stirring effects and subsequent recrystallization lead weld formation in case of friction stir welding (FSW) between two workpieces [21][22][23][24] while alter the microstructures and properties in case of friction stir processing (FSP) for monolithic workpiece. [25][26][27][28][29] The stirring process is governed by the tool geometric features, rotational and travel speeds, Figure 2. Applications of FSC, (a) Heat exchanger, [12] (b) Heat sinks for semiconductors, [12] (c) Water cooled engine block, [12] (d) Panel for pre pressing of fish blocks before quick freezing, [12] (e, f) Cooling channels in the wall chamber [13] (g) Wiring inside solid component and (h) Metallic core composites made with channels.…”

Section: Friction Stir Channeling With Shoulderworkpiece Clearancementioning

confidence: 99%

A review on friction stir-based channeling

Mehta

Vilaça

2021

Critical Reviews in Solid State and Materials Sciences

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Friction stir-based channeling is a solid-state processing encompassing the friction stir channeling (FSC) and its variants. In one manufacturing action, the FSC delivers a subsurface internal closed channel in a monolithic plate with no length limitation. The unique characteristics of theses internally closed channels produced with FSC can fit the demand from several industrial fields, namely lightweight structurally stiffened panels and applications where high power density requires highly efficient thermal management systems, such as power electronics and electric vehicles-based transportation. This first review on the FSC and its variants encompasses a systematic and comprehensive understanding on physical properties, including thermal performance and channel manufacturability applied to different engineering materials. The discussion is emphasized on working principle of channel formation, tool design, influence of process parameters, geometrical characterization, mechanical properties, hardness field and microstructural features correlated with mechanical properties. It can be summarized that novel processing of channels by FSC enhances the thermal performance compared to conventional fabrication techniques. FSC can produce complex path channels with various sizes, shapes and surface finishing. Precise control on process parameters and material flow governs the channel formation that subsequently influences thermal and mechanical performances of the channels. FSC has been applied to different range of thermal management systems and has potential for many demanding existent applications and enabling new high-performance products. From the initial FSC concept based on a shoulder-workpiece clearance, to the most recent solutions, such as the stationary shoulder FSC, and the no-tilt-angle and no-shoulder-workpiece clearance, allowing the manufacturing of large size channels, leaving the processed surface at its original quota and ready to be used. A significant leap is introduced with the Hybrid FSC enabling simultaneous welding and channeling, of similar and dissimilar metal components, and therefore, enhancing design opportunities for even more competitive solutions.

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Section: Friction Stir Channeling With Shoulderworkpiece Clearancementioning

confidence: 99%

A review on friction stir-based channeling

Mehta

Vilaça

2021

Critical Reviews in Solid State and Materials Sciences

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“…Dixit et al [15] made a series of holes below the top surface and filled those with NiTi powder. Some earlier reports suggest that powder can be placed and fixed over the substrate by glue spray [16,17].…”

Section: Workpiece Preparationmentioning

confidence: 99%

“…In addition to the above-mentioned hardening mechanism, the presence of homogeneously distributed hard particles reduces the interparticle distance of reinforcements in the composite, thereby increasing the possibility to indent on the hard particle during microhardness measurement; as a result, average microhardness increases. Santos et al [17] prepared alumina reinforced AMC by electric currentassisted FSP route and observed that the current softened the matrix promoting better material flow. Consequently, better distribution of particles was obtained in the currentassisted AMC, which exhibited higher microhardness.…”

Section: Microhardnessmentioning

confidence: 99%

Microstructural, mechanical and wear characteristics of aluminum matrix composites fabricated by friction stir processing

Maji

Ghosh

Nath

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Aluminum matrix composites are widely used in aerospace, automotive industry and defense sector owing to its excellent weight-to-strength ratio. Friction stir processing has emerged as an excellent technique to produce particle reinforced as well as fiber reinforced aluminum matrix composites. This article is a state of the art of aluminum matrix composite fabrication by friction stir processing route. The fabrication procedure has been discussed with carefully mentioning the parameters associated with the process. Microstructures and consequent mechanical properties of the composites have been evaluated. Particular attention is given on the microstructural modification and strengthening mechanism. Also the wear and corrosion behavior of the composites has been discussed thoroughly. Finally, the article has been concluded with some suggestions toward future work.

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“…A large number of research works have been focused on achieving a homogeneous distribution of particles, elimination of agglomeration of particles, overcoming of tunnel-like defects and achieving a wide composite zone by utilizing various strategies such as applying multiple number of FSP passes, change of tool rotation between passes, process hybridization such as electric current assisted FSP, etc. [6][7][8][9][10] All these, result in loss of time and energy and often loss of substrate properties as well. Multiple passes not only increase the energy input, production time but every pass also lowers the material properties, especially in case of heat-treated materials.…”

Section: Introductionmentioning

confidence: 99%

“…8,[11][12] Few researches have used concave and scrolled shoulder for surface composite fabrication without investigating specifically the effect of the shoulder diameter on the response. [9][10]13 Tool shoulder and pin control the heat generation caused by friction during FSP. Of the two, the shoulder is the main heat generation source since the contact area between shoulder and BM is higher than the pin contact area.…”

Section: Introductionmentioning

confidence: 99%

Surface nanocomposite fabrication on AA6063 aluminium alloy using friction stir processing: an investigation into the effect of the tool-shoulder diameter on the composite microstructure

Gangil¹,

Maheshwari²,

Siddiquee³

2018

Mater. Tehnol.

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In this work, surface metal matrix composites (SMMCs) were fabricated on AA6063 base metal through friction stir processing (FSP). In all the samples for surface composites, grooves of 2 mm × 2 mm were made along the centreline of plates and TiB2 powder (~80 nm) was filled and compacted in these grooves. A pinless tool was employed to initially cover and compact the grooves filled with TiB2 particles to prevent it from sputtering during FSP. Tools of different shoulder diameters (16, 18, and 20) mm with anti-clockwise scrolls on the shoulder surface were used for the FSP with constant pin diameter and pin length. The tool rotational speed of 900 min -1 , traversing speed of 40 mm/min and tilt 2°, respectively, kept constant for all the experiments. Macro, optical micro images and micro hardness tests were used to evaluate the particle distribution. Powder agglomeration was observed in the retreating side of samples processed with 16 mm and 18 mm shoulder diameter tools. On the other hand, significant improvement in particle distribution and excellent bonding with the substrate were observed for the sample processed with 20 mm shoulder diameter tool. The findings of this investigation are important and provide knowledge for better tool design and effective tool selection to bring out better distribution in a single pass. Keywords: friction stir processing, aluminium alloy, shoulder diameter, microstructure V tem prispevku avtorji opisujejo izdelavo in raziskavo izdelanega nanokompozita s kovinsko osnovo (angl.: SMMCs; Surface Metal Matrics Composites) na povr{ini aluminijeve zlitine vrste AA6063, izdelanega s pomo~jo vrtilno (rotacijsko) trenjskega procesa (angl.: FSP; Friction Stir Processing). Vsi vzorci povr{inskega kompozita {irine 2 mm in globine 2 mm so bili izdelani vzdol`sredi{~ne linije kovinske plo{~e. Pri tem so bili med FSP dodajani pribli`no 80 nm delci TiB2 prahu v nastajajo~e brazde. Za za~etno prekrivanje in kompaktiranje brazd napolnjenih s TiB2 so uporabili orodje brez trna in s tem prepre~ili razpr{evanje delcev med FSP. Za izdelavo SMMCs so uporabili dr`ala razli~nih premerov (16, 18, in 20) mm z valj~ki, name{~enimi na povr{ini dr`al, ki so se vrteli v nasprotni smeri urnega kazalca. Pri tem so za FSP uporabili trn s konstantnim premerom in dol`ino. Pri vseh preizkusih so za izbrani FSP uporabili hitrost vrtenja 900 min -1 , vzdol`no hitrost potovanja orodja 40 mm/min, in nagib 2°. Da bi ugotovili porazdelitev delcev TiB2 v izdelanih SMMCs so izvedli metalografske preiskave in dolo~ili mikrotrdoto kompozitov. Opazili so aglomeracijo pra{nih delcev na vzorcih izdelanih s 16 mm in 18 mm premerom dr`ala orodja. Po drugi strani pa so dosegli pomembno izbolj{anje porazdelitve pra{nih delcev in njihovo odli~no vezavo s kovinsko osnovo pri vzorcih, ki so bili izdelani z 20 mm premerom dr`ala orodja. Ugotovitve te raziskave omogo~ajo bolj{e oblikovanje in u~inkovito izbiro orodja za doseganje optimalne porazdelitve nanodelcev v kovinski osnovi pri FSP z enim samim prehodom F. Klju~ne besede: proce...

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Surface reinforcement of AA5083-H111 by friction stir processing assisted by electrical current

Cited by 30 publications

References 11 publications

A review on friction stir-based channeling

A review on friction stir-based channeling

Microstructural, mechanical and wear characteristics of aluminum matrix composites fabricated by friction stir processing

Surface nanocomposite fabrication on AA6063 aluminium alloy using friction stir processing: an investigation into the effect of the tool-shoulder diameter on the composite microstructure

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