Effect of Magnetic-Mechanical Coupled Stirring on the Distribution of B4C Particles in Al-B4C Composites

In this study, to evaluate the effect of boron carbide (B4C) addition on the wear performance of aluminum (Al), Al6061 and 5, 10, and 20 vol.% B4C/Al6061 composites were manufactured using the stir casting and hot rolling processes. B4C particles were randomly dispersed during the stir casting process; then, B4C particles were arranged in the rolling direction using a hot rolling process to further improve the B4C dispersion and wear resistance of the composites. Furthermore, a continuous interfacial layer between B4C and the Al6061 matrix was generated by diffusion of titanium (Ti) and chromium (Cr) atoms contained in the Al6061 alloy. Wear depth and width of the composites decreased with increasing B4C content. Furthermore, with B4C addition, coefficient of friction (COF) improved as compared with that of Al6061. The results indicate that interface-controlled, well-aligned B4C particles in the friction direction can effectively increase the wear properties of Al alloys and improve their hardness.

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Optimization of Al Matrix Reinforced with B4C Particles

JOM ◽

10.1007/s11837-012-0502-2 ◽

2012 ◽

Vol 65 (2) ◽

pp. 272-277 ◽

Cited By ~ 11

Author(s):

Mohsen Ostad Shabani ◽

Ali Mazahery

Keyword(s):

B4c Particles ◽

Al Matrix

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Microstructure and tensile behaviour of B4C particles reinforced Al6061 matrix composites

Materials Today Proceedings ◽

10.1016/j.matpr.2021.11.188 ◽

2021 ◽

Author(s):

T.N. Kavitha ◽

V. Auradi ◽

G.L. Rajesh ◽

V. Bharath ◽

S. Mahendra Kumar ◽

...

Keyword(s):

Tensile Behaviour ◽

Matrix Composites ◽

B4c Particles

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Investigation of mechanical properties on Al 6061-B4C composite by squeeze casting process technique

International Research Journal of Multidisciplinary Technovation ◽

10.34256/irjmt1915 ◽

2019 ◽

Vol 1 (1) ◽

pp. 38-48

Author(s):

A. Sathishkumar ◽

Gowtham A ◽

M. Jeyasuriya ◽

S. DineshBabu

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Metal Matrix ◽

Squeeze Casting ◽

Casting Process ◽

Weight Fraction ◽

Squeeze Pressure ◽

B4c Particles ◽

Engineering Industries ◽

Squeeze Casting Process

Aluminum alloy is widely used in automotive, aerospace and other engineering industries because of its excellent mechanical properties. The main objective is to enhance 6061 Al alloy’s mechanical properties by producing 6061-B4C composite through squeeze casting process. Experimentation was carried out with different micron sizes and weight fraction of B4C particles. The mechanical properties of reinforced metal matrix were experimentally investigated in terms of Ultimate Tensile Strength and Hardness. We observe that these two properties are improved by the reinforcement of B4C particles and applied squeeze pressure.

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Effect of In-Situ Synthesized Boride Phases on the Impact Behavior of Iron-Based Composites Reinforced by B4C Particles

Metals ◽

10.3390/met10050554 ◽

2020 ◽

Vol 10 (5) ◽

pp. 554

Author(s):

Fehmi Nair ◽

Mustafa Hamamcı

Keyword(s):

Contact Forces ◽

Impact Behavior ◽

Iron Matrix ◽

Impact Tests ◽

B4c Particles ◽

Iron Based ◽

In Situ Reactions ◽

Boride Phases ◽

The Impact

The objective of this study is to investigate the impact behavior of iron-based composites reinforced with boron carbide (B4C) particles and in-situ synthesized iron borides (Fe2B/FeB). The composite specimens (Fe/B4C) were fabricated by hot-pressing under a pressure of 250 MPa at 500 °C, and sintered at a temperature of 1000 °C. The effects of the reinforcement ratio on the formation of in-situ borides and impact behavior were investigated by means of different volume fractions of B4C inside the iron matrix: 0% (un-reinforced), 5%, 10%, 20%, and 30%. Drop-weight impact tests were performed by an instrumented Charpy impactor on reinforced and un-reinforced test specimens. The results of the impact tests were supported with microstructural and fractographical analysis. As a result of in-situ reactions between the Fe matrix and B4C particles, Fe2B phases were formed in the iron matrix. The iron borides, formed in the iron matrix during sintering, heavily affected the hardness and the morphology of the fractured surface. Due to the high amount of B4C (over 10%), porosity played a major role in decreasing the contact forces and fracture energy. The results showed that the in-situ synthesized iron boride phases affect the impact properties of the Fe/B4C composites.

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Enhancing Properties of Aerospace Alloy Elektron 21 Using Boron Carbide Nanoparticles as Reinforcement

Applied Sciences ◽

10.3390/app9245470 ◽

2019 ◽

Vol 9 (24) ◽

pp. 5470

Author(s):

Sravya Tekumalla ◽

Ng Joo Yuan ◽

Meysam Haghshenas ◽

Manoj Gupta

Keyword(s):

Mechanical Properties ◽

Boron Carbide ◽

Compressive Loading ◽

Hot Extrusion ◽

Microstructural Characterization ◽

Thermal Insulating ◽

Damping Characteristics ◽

B4c Particles ◽

Superior Mechanical Properties ◽

Melt Deposition

In this study, the effect of nano-B4C addition on the property profile of Elektron 21 (E21) alloys is investigated. E21 reinforced with different amounts of nano-size B4C particulates was synthesized using the disintegrated melt deposition technique followed by hot extrusion. Microstructural characterization of the developed E21-B4C composites revealed refined grains with the progressive addition of boron carbide nanoparticles. The evaluation of mechanical properties indicated a significant improvement in the yield strength of the nanocomposites under compressive loading. Further, the E21-2.5B4C nanocomposites exhibited the best damping characteristics, highest young’s modulus, and highest resistance to ignition, thus featuring all the characteristics of a material suitable for several aircraft applications besides the currently allowed seat frames. The superior mechanical properties of the E21-B4C nanocomposites are attributed to the refined grain sizes, uniform distribution of the nanoparticles, and the thermal insulating effects of nano-B4C particles.

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