Production and characterization of an advanced AA6061-Graphene-TiB2 hybrid surface nanocomposite by multi-pass friction stir processing

Nazari, Mojtaba; Eskandari, H.; Khodabakhshi, F.

doi:10.1016/j.surfcoat.2019.124914

Cited by 59 publications

(21 citation statements)

References 61 publications

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“…The hard particles may be introduced into the stirred metal directly [7][8][9][11][12][13] or form in-situ inside the metal [14][15][16][17][18] by means of solid-state reactions between the admixed components, between the admixed components and the matrix or between the dissimilar metals processed. The FSP preparation of hybrid composites with the use of in-situ reactions shows up some advantages over those obtained using commercially available reinforcement particles.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of In-Situ Friction Stir Processed Al-Cu Transition Zone

Zykova

Чумаевский

Gusarova

et al. 2020

Metals

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The majority of literature sources dedicated to dissimilar Al-Cu friction stir welding testifies to the formation of intermetallic compounds (IMC) according to diffusion-controlled reactions, i.e., without liquation on the Al/Cu interfaces. Fewer sources report on revealing Al-Cu eutectics, i.e., that IMCs are formed with the presence of the liquid phase. This work is an attempt to fill the gap in the results and find out the reasons behind such a difference. Structural-phase characteristics of an in-situ friction stir processed (FSP) Al-Cu zone were studied. The single-pass FSPed stir zone (SZ) was characterized by the presence of IMCs such as Al2Cu, Al2Cu3, AlCu3, Al2MgCu, whose distribution in the SZ was extremely inhomogeneous. The advancing side SZ contained large IMC particles as well as Al(Mg,Cu) solid solution (SS) dendrites and Al-Al2Cu eutectics. The retreating side SZ was composed of Al-Cu solid solution layered structures and smaller IMCs. Such a difference may be explained by different levels of heat input with respect to the SZ sides as well as by using lap FSP instead of the butt one.

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Section: Introductionmentioning

confidence: 99%

Microstructure of In-Situ Friction Stir Processed Al-Cu Transition Zone

Zykova

Чумаевский

Gusarova

et al. 2020

Metals

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“…Interestingly, this improvement can be attributed to grain fragmentation, work hardening, and precipitates' partial formation. Thus, with the increase in grain boundaries and recrystallized grains in the SZ of Al 5052 and Al 5052/TiB, the maximum mechanical properties were observed in one and two passes, respectively [40,41]. On the other hand, the addition of reinforcing agents from the ceramic phase (TiB) within Al 5052 by the FSP process improved the final US and YS according to the strengthening mechanisms.…”

Section: Corrosion Behaviormentioning

confidence: 95%

Influence of Friction Stir Process on the Physical, Microstructural, Corrosive, and Electrical Properties of an Al–Mg Alloy Modified with Ti–B Additives

et al. 2022

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In this study, two successive methods were used to improve the grain structure and the mechanical and physical properties of Al 5052 aluminum alloy. The modifying elements, 0.99 wt.% of titanium (Ti) and 0.2 wt.% of boron (B), were added during the casting process. After solidification, single- and double-pass friction stir processing (FSP) were performed to achieve additional grain refinement and disperse the newly formed phases well. The addition of Ti–B modifiers significantly improved the mechanical and physical properties of the Al 5052 aluminum alloy. Nevertheless, only a 3% improvement in microhardness was achieved. The ultimate strength (US), yield strength (YS), and elastic modulus were investigated. In addition, the electrical conductivity was reduced by 56% compared to the base alloys. The effects of grain refinement on thermal expansion and corrosion rate were studied; the modified alloy with Ti–B in the as-cast state showed lower dimension stability than the samples treated with the FSP method. The grain refinement significantly affected the corrosion resistance; for example, single and double FSP passes reduced the corrosion rate by 11.4 times and 19.2 times, respectively. The successive FSP passes, resulting in a non-porous structure, increased the bulk density and formed precipitates with high bulk density.

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“…The wear resistance of composites produced from high FSP pass was found to be 1.5 times higher than the base metal and this was attributed to the homogeneous dispersion of SiC particles. Nazari et al [51] "have investigated the mechanical properties and wear behavior of hybrid surface composites produced from AA6061 reinforced with TiB 2 and graphene particles via multi-pass FSP technique. The composites were fabricated using the tool with a prismatic pin profile.…”

Section: Fabrication Of Surface Composites Using Aa6xxxmentioning

confidence: 99%

Al-Based Surface Composites and Strengthening Of Welded Joints Through Multi-Pass FSP Technique: A Review

2021

IJATCSE

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Friction stir processing (FSP) is a microstructural modifying technique that uses the same principles as the friction stir welding technique. FSP technique can be employed on the same surface repeatedly as desiredand this repetition is called multi-pass friction stir processing (MFSP). The recent developments have shown that MFSP technique is very useful towards uniform dispersion of reinforcement particles during fabrication of surface composites. Some studies have also demonstrated that MFSP technique can be employed on welded joints as a way of improving the mechanical properties of the welded joints. This paper reports on the progress made in using the multi-pass friction stir processing (MFSP) technique in producing aluminium-based surface composites. It further looks at the progress made in using the MFSP on aluminium-based welded joints. An effort is made to identify the gap that requires some exploration for the better utilization and understanding of this technique

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Production and characterization of an advanced AA6061-Graphene-TiB2 hybrid surface nanocomposite by multi-pass friction stir processing

Cited by 59 publications

References 61 publications

Microstructure of In-Situ Friction Stir Processed Al-Cu Transition Zone

Microstructure of In-Situ Friction Stir Processed Al-Cu Transition Zone

Influence of Friction Stir Process on the Physical, Microstructural, Corrosive, and Electrical Properties of an Al–Mg Alloy Modified with Ti–B Additives

Al-Based Surface Composites and Strengthening Of Welded Joints Through Multi-Pass FSP Technique: A Review

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