High Temperature Strength Retention of Aluminum Boron Carbide (AIBC) Composites

Pyzik, Aleksander J.; Newman, Robert A.; Allen, S.

doi:10.1002/9780470339497.ch27

Cited by 3 publications

(3 citation statements)

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“…Al-B 4 C composites have good fatigue strength and wear resistance in addition to possessing strength, ductility, toughness, thermal and chemical stability (Kainer, 2006; Ramnath et al , 2014; Arslan and Kalemtas, 2009). Researchers have proved that aluminium boron carbide composites can retain properties at high temperature (Pyzik et al , 2007).…”

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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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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“…It is also used in the manufacture of brake drum and rotors. These composites have good fatigue strength and wear resistance in addition to possessing strength, ductility, toughness, thermal and chemical stability and retain mechanical properties at high temperatures [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of High Temperature on Wear Behavior of Stir Cast Aluminium/Boron Carbide Composites

Canute

Majumder

2018

Mechanics and Mechanical Engineering

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The need for development of high temperature wear resistant composite materials with superior mechanical properties and tribological properties is increasing significantly. The high temperature wear properties of aluminium boron carbide composites was evaluated in this investigation. The effect of load, sliding velocity, temperature and reinforcement percentage on wear rate was determined by the pin heating method using pin heating arrangement. The size and structure of base alloy particles change considerably with an increase of boron carbide particles. The wettability and interface bonding between the matrix and reinforcement enhanced by the addition of potassium flurotitanate. ANOVA technique was used to study the effect of input parameters on wear rate. The investigation reveals that the load had higher significance than sliding velocity, temperature and weight fraction. The pin surface was studied with a high-resolution scanning electron microscope. Regression analysis revealed an extensive association between control parameters and response. The developed composites can be used in the production of automobile parts requiring high wear, frictional and thermal resistance.

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“…However, the presence of the B 4 C reinforcement may alter the strengthening kinetics in the composite material when compared to the matrix alloy, since reinforcement particulates/fibres are known to produce interactions with the matrix that can affect or hinder the properties otherwise expected. It has been indicated that Al-B 4 C composites retain their high temperature strength; 6 therefore, the possibility of further enhancement using transition element additions is an attractive one and worth pursuing. To this end, and given the high cost of Sc, only Zr and Ti additions will be used.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and fracture of Al–15 vol.-%B₄C based metal matrix composites

Ibrahim

Ammar

Samuel

et al. 2013

International Journal of Cast Metals Research

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The present work was performed on three aluminium metal matrix composites (MMCs) containing 15 vol.-%B 4 C particles. The matrix in two of these materials is pure aluminium, whereas the matrix of the third material was an experimental 6063 aluminium alloy. All composites were homogenised at elevated temperatures for 48 h before being quenched in warm water. The quenched samples were aged in the range of 25-400uC for 10 h, at each temperature. Hardness and tensile tests performed on the aged MMCs show that the presence of Zr (with or without Ti) resulted in a noticeable hardening due to the precipitation of a Zr rich phase. Maximum strengthening was obtained from the 6063 based MMC due to the precipitation of Mg 2 Si phase particles. The present technique used to produce the MMCs examined proved capable of manufacturing composites with a uniform distribution of B 4 C in the matrix with a strong degree of matrix/particle bonding. When the MMC samples were deformed to failure, the B 4 C was fractured transgranularly without debonding from the matrix. The addition of Zr and Ti resulted in the formation of protective layers around the B 4 C particles that were retained after fracture; these protective layers were not affected by the B 4 C particle size (0?15-20 mm). Stacking faults were commonly observed in fractured Al 6063/B 4 C/15p samples. The precipitation of zirconium-titanium compounds during aging contributed to the composite strength.

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High Temperature Strength Retention of Aluminum Boron Carbide (AIBC) Composites

Cited by 3 publications

References 5 publications

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

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

Effect of High Temperature on Wear Behavior of Stir Cast Aluminium/Boron Carbide Composites

Mechanical properties and fracture of Al–15 vol.-%B₄C based metal matrix composites

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High Temperature Strength Retention of Aluminum Boron Carbide (AIBC) Composites

Cited by 3 publications

References 5 publications

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

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

Effect of High Temperature on Wear Behavior of Stir Cast Aluminium/Boron Carbide Composites

Mechanical properties and fracture of Al–15 vol.-%B4C based metal matrix composites

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Mechanical properties and fracture of Al–15 vol.-%B₄C based metal matrix composites