Tribological behavior of liquid metallurgy-processed AA 6061-B<sub>4</sub>C composites

Monikandan, V. V.; Joseph, M. A.; Rajendrakumar, P. K.; Sreejith, M.

doi:10.1088/2053-1591/2/1/016507

Cited by 20 publications

(14 citation statements)

References 23 publications

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“…Figure 1a, b show respectively the optical metallograph of the hybrid composite and its corresponding XRD spectra. The metallograph of the mono composite and its XRD spectra are available in an earlier work [6].…”

Section: Fabrication Of Compositesmentioning

confidence: 99%

Statistical Analysis of Tribological Properties of Aluminum Matrix Composites Using Full Factorial Design

Monikandan

Jacob

Joseph

et al. 2015

Trans Indian Inst Met

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This work describes the tribological properties of mono AA6061-10 wt% B 4 C and hybrid AA6061-10 wt% B 4 C-7.5 wt% Gr composites which could be used as a potential substitute for aluminum alloys used in automotive engines. The tribological experiments are performed as per the experimental scheme designed using full factorial design. The results suggest that the wear loss increases with applied load and sliding distance and the friction coefficient increases with increase in applied load. Further, the ANOVA analysis reveals the statistically and physically significant factors which influence the wear loss and friction coefficient. Formation of Gr-rich tribolayer causes reduction in the wear loss and friction coefficient for hybrid composites compared to the mono ones.

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Section: Fabrication Of Compositesmentioning

confidence: 99%

Statistical Analysis of Tribological Properties of Aluminum Matrix Composites Using Full Factorial Design

Monikandan

Jacob

Joseph

et al. 2015

Trans Indian Inst Met

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“…[27][28][29][30] Several attempts have been made to improve the dry sliding wear behavior of 6061 alloy by developing its mono and hybrid composites. Monikandan et al 31 studied the dry sliding behavior of AA 6061-B 4 C (10 wt.%) composites fabricated through the stir casting technique and reported an increase in wear rate and friction with an increase in the normal load. Abhishek et al 32 evidenced improved tribological performance of friction stir processed AA 6061-CNT composite by forming a continuous carbon-rich tribo layer on the surface.…”

Section: Introductionmentioning

confidence: 99%

Identification of self-lubricative mode for the ultrasonic treated AA6061-B₄C-CNT hybrid composites

Surendran

Gnanavelbabu

Rajkumar

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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This research investigates the self-lubricative behavior of boron carbide (B4C) and carbon nanotube (CNT) reinforced 6061 aluminium alloy hybrid composites. Hybrid composites were prepared by varying the volume percentages (5–15%) of B4C and CNT. Novel ultrasonic vibration (frequency of 20 kHz and power of 2.5 kW) assisted stir casting process was used for fabricating hybrid composites. A pin-on-disc type tribometer mounted with EN-8 as the counterface material was used to evaluate the friction and wear behavior of hybrid composites under dry sliding conditions. Normal loads ranging from 15–45 N and sliding speeds ranging from 1–2 m/s were applied during the experiments. The self-lubricative properties of different hybrid composites were assessed through the examination of the worn surface of pins using surface characterization techniques such as Scanning electron microscopy, Electron dispersive spectroscopy and Raman spectroscopy. The experimental results indicated that the addition of CNT particles increased the hardness of hybrid composites. The matrix strengthening efficiency of CNT was found to be greater at 10 vol.% of B4C, indicating a maximum hardness ranging from 102 to 109 VHN. In comparison, 10 vol.% of CNT hybrid composites showed superior tribological performance at all wear testing conditions. The mode of wear of hybrid composites suggested by the analysis on the worn pin surface was as follows: Scarce (5 vol.% CNT), Tribolayer (10 vol.% CNT) and Fracture (15 vol.% CNT).

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“…They concluded that the addition of graphite deceases the wear rate. Monikandan et al . (2015) investigated the dry sliding wear behaviour of Al6061 with 10 per cent B 4 C composite and found that adhesion, delamination and abrasion are the predominant wear mechanisms influencing the dry sliding wear.…”

Section: Introductionmentioning

confidence: 99%

Investigation of tribological and mechanical properties of aluminium boron carbide composites using response surface methodology and desirability analysis

Canute

Majumder

2018

ILT

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Purpose Aluminium metal matrix composites are used in automotive and aerospace industries because of their high performance and weight reduction benefits. The current investigation aims to focus on the development of the stir cast aluminium-boron carbide composites with enhanced mechanical and tribological properties. Design/methodology/approach The aluminium-boron carbide composites are produced by stir casting process. Aluminium alloy A356 is chosen as the matrix material and three sets of composites are produced with different weight fractions of boron carbide particles. Higher particle size (63 µm) of boron carbide is chosen as the reinforcement material. Aluminium-boron carbide composites are tested for mechanical and tribological properties. The effect of process parameters like load, speed and percentage of reinforcement on the wear rate are studied using the pin-on-disc method. The interaction of the process parameters with the wear rate is analysed by DesignExpert software using RSM methodology and desirability analysis. The coded levels for parameters for independent variables used in the experimental design are arranged according to the central composite design. The worn surface of the pin is examined using a scanning electron microscope. The phases and reaction products of the composites are identified by X-ray diffraction (XRD) analysis. Findings Aluminium-boron carbide composites reveal better mechanical properties compared to monolithic aluminium alloys. Mechanical properties improved with the addition of strontium-based master alloy Al10Sr. The ultimate tensile strength, hardness and compressive strength increase with an increase in the reinforcement content. The wettability of the boron carbide particles in the matrix improved with the addition of potassium flurotitanate to the melt. Uniform dispersion of particles into the alloy during melting is facilitated by the addition of magnesium. Wear resistance is optimal at 8 per cent of boron carbide with a load 20 N and sliding speed of 348 RPM. The wear rate is optimized by the numerical optimization method using desirability analysis. The amount of wear is less in Al-B4C composites when compared to unreinforced aluminium alloy. The wear rate increases with an increase in load and decreases with the sliding speed. The wear resistance increases with an increase in the weight fraction of the boron carbide particles. Practical implications The produced Al-B4C composites can retain properties at high temperature. It is used in nuclear and automotive products owing its high specific strength and stiffness. The main applications are neutron absorbers, armour plates, high-performance bicycles, brake pads, sand blasting nozzles and pump seals. Originality/value Al/B4C composites have good potential in the development of wear-resistant products.

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Tribological behavior of liquid metallurgy-processed AA 6061-B₄C composites

Cited by 20 publications

References 23 publications

Statistical Analysis of Tribological Properties of Aluminum Matrix Composites Using Full Factorial Design

Statistical Analysis of Tribological Properties of Aluminum Matrix Composites Using Full Factorial Design

Identification of self-lubricative mode for the ultrasonic treated AA6061-B₄C-CNT hybrid composites

Investigation of tribological and mechanical properties of aluminium boron carbide composites using response surface methodology and desirability analysis

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Tribological behavior of liquid metallurgy-processed AA 6061-B4C composites

Cited by 20 publications

References 23 publications

Statistical Analysis of Tribological Properties of Aluminum Matrix Composites Using Full Factorial Design

Statistical Analysis of Tribological Properties of Aluminum Matrix Composites Using Full Factorial Design

Identification of self-lubricative mode for the ultrasonic treated AA6061-B4C-CNT hybrid composites

Investigation of tribological and mechanical properties of aluminium boron carbide composites using response surface methodology and desirability analysis

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Tribological behavior of liquid metallurgy-processed AA 6061-B₄C composites

Identification of self-lubricative mode for the ultrasonic treated AA6061-B₄C-CNT hybrid composites