Evaluation of the microstructure and wear behaviour of AA6063-B4C/TiB2 mono and hybrid composite layers produced by friction stir processing

Narimani, Mohammad; Lotfi, Behnam; Sadeghian, Zohreh

doi:10.1016/j.surfcoat.2015.11.015

Cited by 100 publications

(28 citation statements)

References 40 publications

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“…Fine-grained matrix and the Orowan strengthening are the two major contributors to the improvement of the micro-hardness of fabricated composites. 19,20 Surface composites (SCs) fabricated in this study exhibited significantly higher hardness than the base metal due to the presence of hard TiB 2 particles. The average micro-hardness of the sample processed with 20 mm diameter tool is highest among all the samples.…”

Section: Microhardnessmentioning

confidence: 92%

“…Narimani et al 20 also fabricated AA6063/TiB 2 composite and reported an increase in hardness to a significant value due to higher inherent hardness (2500 kg/mm 2 ) of the reinforcement particles. Fine-grained matrix and the Orowan strengthening are the two major contributors to the improvement of the micro-hardness of fabricated composites.…”

Section: Microhardnessmentioning

confidence: 99%

“…[15][16][17][18] Some researchers have fabricated AA6063/TiB 2 composites by using liquid metallurgy and FSP process. [19][20] However, this study is performed with a specific objective to understand the distribution of TiB 2 particles in the AA6063 alloy for which the effect of tool shoulder diameter has been investigated. In this paper tool shoulder diameter was varied and their effect on particle distribution and hardness were analysed.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Microhardnessmentioning

confidence: 92%

Section: Microhardnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…Morisada et al [10] improved the hardness and thermal stability of AZ31 by dispersing multiwalled carbon nanotubes as reinforcement into the AZ31 alloy by FSP. Narmani et al [11] have evaluated about the wear behaviour of AA6063/hybrid surface composite by FSP; they found that the embedment of B 4 C and TiB 2 ceramic particles on the surface increased the hardness and improved the wear behaviour of composite layers in comparison with FSPed AA6063. Mishra et al [12] have studied about the effect of processing parameters such as hole geometry, pattern and number of passes in the fabrication of Al-B 4 C composites by incorporating B 4 C particles into the 5024 Al matrix.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano-TiO$_2$ Particles on Wear and Corrosion Behaviour of AA6063 Surface Composite Fabricated by Friction Stir Processing

Muthukrishnan¹,

Balaji²,

Raghav³

2018

Metallofiz. Noveishie Tekhnol.

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In this investigation, the effect of nano-TiO 2 particles on wear and corrosion behaviour of AA6063 surface nanocomposites produced via friction stir processing (FSP) was studied. Microstructure analysis of fabricated surface nanocomposites was done with scanning electron microscope and found that TiO 2 nanoparticles are uniformly dispersed in the stir zone. The surface nanocomposites were characterized by hardness, wear and corrosion tests. The results revealed that the microhardness increases due to the presence of hard TiO 2 nanoparticles than as AA6063 alloy. The FSPed surface nanocomposites exhibited low frictional coefficient, excellent wear resistance and adequate corrosion resistance at 40 mm/min and as compared to that of the as cast alloy.Key words: AA6063 alloy, TiO 2 nanoparticles, friction stir processing, surface nanocomposites, microstructure, microhardness, wear behaviour, corrosion behaviour.Досліджено вплив наночастинок TiO 2 на характер зношування та корозії поверхневих нанокомпозитів стопу AA6063, одержаних за допомогою об-роблення тертям з перемішуванням. Проведено аналізу одержаних пове-рхневих нанокомпозитів методою сканувальної електронної мікроскопії та встановлено, що наночастинки TiO 2 рівномірно розподілені в зоні пе-ремішування. Для характеризації поверхневих нанокомпозитів було ви-користано випробування на твердість, зносостійкість і корозійну стій-кість. Показано, що мікротвердість підвищується у порівнянні зі стопом AA6063 завдяки наявності наночастинок TiO 2 . Оброблені методою тертя з Ключові слова: стоп AA6063, наночастинки TiO 2 , оброблення фрикцій-ним перемішуванням, поверхневі нанокомпозити, мікроструктура, мік-ротвердість, характеристики зношування, корозійні властивості.Исследовано влияние наночастиц TiO 2 на характер износа и коррозии по-верхностных нанокомпозитов сплава AA6063, полученных с помощью обработки трением с перемешиванием. Проведён анализ поверхностных нанокомпозитов методом сканирующей электронной микроскопии и по-казано, что наночастицы TiO 2 равномерно распределены в зоне переме-шивания. Для характеризации поверхностных нанокомпозитов были ис-пользованы испытания на твёрдость, износостойкость и коррозионную стойкость. Показано, что микротвёрдость повышается по сравнению со сплавом AA6063 благодаря наличию наночастиц TiO 2 . Обработанные ме-тодом трения с перемешиванием поверхностные нанокомпозиты облада-ют низким коэффициентом трения, отменной износостойкостью и адек-ватной коррозионной стойкостью при 40 мм/мин по сравнению со спла-вом в литом состоянии.Ключевые слова: сплав AA6063, наночастицы TiO 2 , обработка фрикци-онным перемешиванием, поверхностные нанокомпозиты, микрострукту-ра, микротвёрдость, характеристики износа, коррозионные свойства.

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“…friction stir processing [16][17][18] , gas pressure infiltration 19,20 , in-situ reactive processes 21,22 , etc.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and microstrain evolution of Al-TiB₂ composite coating by cold spray deposition

Chen

Pala

Hussain

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part L:

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This paper investigates the microstructure evolution of Al-TiB 2 coatings prepared by cold spraying. In situ Al-TiB 2 composite powders containing uniformly distributed titanium diboride (TiB 2 ) particles with a size range of 5 to 100 nm in the Al matrix and Al/Al-TiB 2 blended powders were used as the cold spray feedstock for coating fabrication on aluminium alloy substrates. The microstructures of the feedstock powders and as-deposited coatings were characterised using scanning electron microscopy with energy dispersive X-ray (EDX) analysis and X-ray diffraction (XRD). Al/Al-TiB 2 blended powder coatings, compromising closely packed powder particles, were sprayed to an approximate thickness of 500 µm. AlTiB 2 composite coatings (approximately 50 µm thick) were obtained retaining the microstructure of the composite powders being sprayed and no evidence of detrimental phase transformation was found. However, micro-cracks were found to exist in the Al-TiB 2 coating due to the hardly deformable powder particles. Little or no microstrain was revealed in the assprayed Al-TiB 2 coating, indicating that annealing may have occurred due to the localised adiabatic heating during the spraying process. It is demonstrated that it is possible to fabricate 2 the Al-TiB 2 composite coating by cold spray deposition but further improvements to eliminate coating cracking are required.

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Evaluation of the microstructure and wear behaviour of AA6063-B4C/TiB2 mono and hybrid composite layers produced by friction stir processing

Cited by 100 publications

References 40 publications

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

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

Effect of Nano-TiO$_2$ Particles on Wear and Corrosion Behaviour of AA6063 Surface Composite Fabricated by Friction Stir Processing

Fabrication and microstrain evolution of Al-TiB₂ composite coating by cold spray deposition

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Evaluation of the microstructure and wear behaviour of AA6063-B4C/TiB2 mono and hybrid composite layers produced by friction stir processing

Cited by 100 publications

References 40 publications

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

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

Effect of Nano-TiO$_2$ Particles on Wear and Corrosion Behaviour of AA6063 Surface Composite Fabricated by Friction Stir Processing

Fabrication and microstrain evolution of Al-TiB2 composite coating by cold spray deposition

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Fabrication and microstrain evolution of Al-TiB₂ composite coating by cold spray deposition