Dry sliding and abrasive wear behaviour of Al-7075 reinforced with alumina and boron nitride particulates

Rakshath, S.; Suresha, B.; Kumar, Rakesh; Saravanan, I.

doi:10.1016/j.matpr.2019.09.010

Cited by 21 publications

(13 citation statements)

References 15 publications

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“…The h-BN particle has low density (2.28 g/cc), and when used as reinforcement not only improves the matrix strength but also enhances its toughness, hardness, and wearresistance with low Co-efficient of Friction (CoF) [40]. Further, h-BN particles help to achieve the high hardness and mechanical properties [41] and improvement in tribological properties with uniform distribution on the microstructure of MMCs [42,43] leading to a reduction in friction and wear [44] and higher tensile strength [13]. h-BN is used extensively in aerospace, automobile, ceramics, construction, cosmetics, dental cement, households, etc.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the mechanical and tribological characteristics of AA7075/h-BN and AA7075/h-BN/MoS₂ hybrid nano-composites produced using stir-squeeze casting process

Beyanagari¹,

Kandasamy²

2021

Surf. Topogr.: Metrol. Prop.

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AA7075 is used in several automobile applications due to its low density and better mechanical properties. However, the friction and wear properties of AA7075 are not up to the mark to extend its application for tribological applications. Hence, this present study focuses on improving the mechanical and wear properties of AA7075 through different reinforcements like h-BN and MoS 2 nanoparticles. Two different composites namely AA7075/h-BN and hybrid AA7075/h-BN/MoS 2 are produced using a stir-squeeze casting process by varying weight percentages of h-BN and MoS 2 particles and their mechanical and tribological characteristics are compared. Physical characterization like morphology, phase structure, density, and porosity values are determined. The reinforcement of MoS 2 and h-BN particles has modified the microstructure in terms of dendrite formation. Hardness is measured and correlated with the tensile strength of the developed composites. Maximum ultimate tensile strength (UTS) of 361.5 MPa is obtained for AA7075/h-BN composite as compared to hybrid AA7075/h-BN/MoS 2 and AA7075. A higher hardness of 164.39 HV is attained for AA7075/1.0h-BN/0.5MoS 2 composite as compared to AA7075/h-BN composites and AA7075. Tribological characterization is studied using the pin-on-disc apparatus at an applied load of 40 N, a sliding distance of 1000 m, and a sliding velocity of 2 m s −1 . Higher delamination and adhesion wear exhibited by AA7075 is controlled with the reinforcements of h-BN and MoS 2 nanoparticles. Comparatively, the hybrid AA7075/h-BN/MoS 2 has shown better tribology behavior than the other composites. Additionally, the various wear mechanisms of AA7075/h-BN and hybrid AA7075/h-BN/MoS 2 composites during the sliding are studied.

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Section: Introductionmentioning

confidence: 99%

A comparative study on the mechanical and tribological characteristics of AA7075/h-BN and AA7075/h-BN/MoS₂ hybrid nano-composites produced using stir-squeeze casting process

Beyanagari¹,

Kandasamy²

2021

Surf. Topogr.: Metrol. Prop.

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“…Rakshath et al [84] have used alumina and hexagonal boron nitride as fillers with AA7075 alloy. They have used two step stir casting method and formulation of the composites are 2.5 and 5 %wt.…”

Section: Research Based On Hybrid Compositesmentioning

confidence: 99%

Reinforcements, production techniques and property analysis of AA7075 matrix composites − a critical review

et al. 2021

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Aluminium alloy based metal matrix composites are being extensively used in the aerospace, automobile, defense, marine and electronic industries owing to their excellent strength, high resistance to wear, corrosion and better thermal stability. Many investigators have explored different aluminium alloy series composites, like heat treatable AA2024, AA6061 and AA7075 since the properties of these matrix alloys can be easily tailor made to suite specific application due to easy processability and heat treatability. AA7075 alloy matrix is predominantly being used, as it exhibits high ultimate tensile strength, resistance to corrosion and fatigue in the group. In the current review work, attention is focused to present types of reinforcing materials used, benefits of reinforcement hybridization, methods employed for composite production and critical property analysis, with conclusions of experimentation and the suggested prospective applications of AA7075 composites. Due to good castability and moldability variety of processing techniques in solid, semisolid and liquid states are possible. As matrix alloy, low processing temperature, ability to accommodate reinforcements and adoptability to different reinforcing techniques, it is easy to obtain optimal properties as per the application. AA7075 with small addition of copper is paved the path in the field of electronic and military applications due to high thermal and electrical conductance. Even pure metal addition & magnesium with copper facilitate good weldability, plasticity and corrosion resistance. Due to the flexibility in accommodating carbide and oxide compound reinforcements in the matrix, this matrix composite widens versatility limit due to excellent hardness and wear resistance. CNT and graphite reinforcements to this aluminium series matrix are marked as ultra-high precision components in defense field.

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“…Because, day by day the usage of Al alloys are increases in all automobile, aerospace, nuclear and naval industries [1][2][3] due to light in weight. Based on the literature [4][5][6][7] it has been found that the strength of Al 7075 has high and more potential in tribological applications. Around the world, many researchers [8][9][10] studied the tribological properties of the Al 7075 alloy reinforced with numerous ceramic particles such as, titanium carbide (TiC), graphite (Gr), silicon carbide (SiC), alumina (Al 2 O 3 ), titanium boride (TiB 2 ) etc.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Al 7075 Composite Reinforced with ZrB2 Using Grey Relational Analysis

Karumuri¹,

Das²,

Krishna³

2022

Adv. Sci. Technol. Res. J.

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In this work, the authors investigate the optimal tribological parameters of Al 7075 composite reinforced with ZrB 2 using Grey Relational Analysis (GRA). Initially, the composite specimens were prepared by the variation of reinforcement 5%, 10% and 15% using stir casting routing method. Further, the developed metal matrix composites are used to measure the wear and frictional properties on pin-on -disc testing apparatus. The input parameters such as, wt% of reinforcement (5%, 10% and 15%), load (4.92N, 9.81N and 14.72N) and the time required for conducting the wear test is (15 min. 30 min and 45 min). A Taguchi L 9 orthogonal array was designed for conducting the number of experiments. Based on the combination of number of experiments wear study has been conducted on the wear testing apparatus. Moreover, GRA was used for obtaining the best optimal input control parameters that gives minimum magnitude of wear and coeffi cient of friction (COF). Finally, the confi rmatory experiments are conducted and verifi ed with the Taguchi grey relational analysis. The results shows that the predicated optimal mean value is almost similar to the experimental value.

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Dry sliding and abrasive wear behaviour of Al-7075 reinforced with alumina and boron nitride particulates

Cited by 21 publications

References 15 publications

A comparative study on the mechanical and tribological characteristics of AA7075/h-BN and AA7075/h-BN/MoS₂ hybrid nano-composites produced using stir-squeeze casting process

A comparative study on the mechanical and tribological characteristics of AA7075/h-BN and AA7075/h-BN/MoS₂ hybrid nano-composites produced using stir-squeeze casting process

Reinforcements, production techniques and property analysis of AA7075 matrix composites − a critical review

Tribological Properties of Al 7075 Composite Reinforced with ZrB2 Using Grey Relational Analysis

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Dry sliding and abrasive wear behaviour of Al-7075 reinforced with alumina and boron nitride particulates

Cited by 21 publications

References 15 publications

A comparative study on the mechanical and tribological characteristics of AA7075/h-BN and AA7075/h-BN/MoS2 hybrid nano-composites produced using stir-squeeze casting process

A comparative study on the mechanical and tribological characteristics of AA7075/h-BN and AA7075/h-BN/MoS2 hybrid nano-composites produced using stir-squeeze casting process

Reinforcements, production techniques and property analysis of AA7075 matrix composites − a critical review

Tribological Properties of Al 7075 Composite Reinforced with ZrB2 Using Grey Relational Analysis

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Product

Resources

About

A comparative study on the mechanical and tribological characteristics of AA7075/h-BN and AA7075/h-BN/MoS₂ hybrid nano-composites produced using stir-squeeze casting process

A comparative study on the mechanical and tribological characteristics of AA7075/h-BN and AA7075/h-BN/MoS₂ hybrid nano-composites produced using stir-squeeze casting process