Hardness and sliding wear characteristics of AA7075-T6 surface composites reinforced with B<sub>4</sub>C and MoS<sub>2</sub> particles

Patle, Hemendra; Mahendiran, P.; Sunil, B. Ratna; Dumpala, Ravikumar

doi:10.1088/2053-1591/ab1ff4

Cited by 31 publications

(20 citation statements)

References 41 publications

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“…Metallurgical transformations like Orowan strengthening by uniform particle dispersal, grain refinement, and work hardening owing to the strain misfit among the elastic reinforcing powders and the plastic matrix are the main strengthening mechanisms backed to improved wear resistance [42,48]. Reinforcement of solid lubricant MoS 2 with B 4 C powder improves the material flow characteristics of B 4 C abrasive particles around the tool pin during processing, which outcomes in superior dispersion of B 4 C particles in the AA6061 matrix [59]. Extraordinary lubricant performance of MoS 2 is credited to big spacing or feebler bond in S-Mo-S layers along with favorable electron distribution on the constituent atoms, which assist the appropriate mixing of MoS 2 and B 4 C [39].…”

Section: Wear Behaviormentioning

confidence: 99%

Different reinforcement strategies of hybrid surface composite AA6061/(B₄C+MoS₂) produced by friction stir processing

Sharma

Patel

Badheka

et al. 2020

Materialwissenschaft Werkst

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Aluminum surface composites have gained huge importance in material processing due to their noble tribological characteristics. The reinforcement of solid lubricant particles with hard ceramics further enriches the tribological characteristics of surface composites. In the current study, friction stir processing was chosen to synthesize hybrid surface composites of aluminum containing B 4 C and MoS 2 particles with anticipated improved tribological behavior. B 4 C and MoS 2 powder particles in 87.5: 12.5 ratio were reinforced into the AA6061 by hole and groove method. Microstructural observations indicated that reinforcement particles are well distributed in the matrix. The hardness and wear resistance of hybrid surface composites improved as compared to the base material, due to well distributed abrasive B 4 C and solid lubricant MoS 2 particles in AA6061. The hybrid surface composites achieved~32 % increased average hardness as compared to the base material. Hole method revealed~13 % better wear resistance compared to the groove method for friction stir processed hybrid surface composite, attributing to an improved homogeneity of particle distribution shown by zigzag hole pattern. Moreover, friction stir processed AA6061 without reinforcement particles exhibited reduced hardness and wear resistance due to loss of strengthening precipitates during multi-pass friction stir processing.

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Section: Wear Behaviormentioning

confidence: 99%

Different reinforcement strategies of hybrid surface composite AA6061/(B₄C+MoS₂) produced by friction stir processing

Sharma

Patel

Badheka

et al. 2020

Materialwissenschaft Werkst

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“…Hybrid composites displayed improved hardness, ballistic resistance, and ballistic mass efficiency factor attributed to dispersion strengthening by particle reinforcement. Patle et al [45] fabricated mono AA7075/B4C and AA7075/B4C+ MoS2 hybrid surface composite by FSP. All processed samples showed lower hardness than base alloy AA7075 due to the intermetallic strengthening phase dissolution by FSP.…”

Section: Effect Of B4c Reinforcement In Hybrid Amcsmentioning

confidence: 99%

“…Hybrid composites displayed improved hardness, ballistic resistance, and ballistic mass efficiency factor. Patle et al [45] Friction stir processing AA7075-T 6 B4C (10-15 μm) and MoS2 (60-80 nm)…”

Section: Aa5083-o B4c and Tic (Both 30-60 Nm)mentioning

confidence: 99%

Boron Carbide (B4C) Reinforced Aluminum Matrix Composites (AMCs)

Sharma¹,

Sharma²,

Upadhyay³

2019

IJITEE

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Aluminum matrix composites (AMCs) demonstrating a good combination of properties that are hard to acquire by a monolithic aluminum material. Since the last few decades, investigators have shown their keen interest to advance these materials for complex applications. Homogeneous reinforcement distribution, defect-free microstructure, and improved resultant properties depends on the fabrication method along with matrix and reinforcement materials and size. Two-step melt stirring technique and K2TiF6 flux enhanced the wettability and improve the particle distribution of boron carbide (B4C) in AMCs. The mechanical properties of the AMCs were enriched by either extrusion process or thermal treatment. Hybrid composites exhibited better characteristics than mono composites. Surface composites manufactured by incorporation of reinforcement in the surface layer; offer good surface properties without losing toughness and ductility. The B4C-Al interfacial reactions produce different precipitates in AMCs and damaged the composite's age-hardening ability. B4C reinforced friction stir processed surface composites exhibits refined structure and better properties compared to the aluminum matrix. The strength, hardness, and wear resistance of AMCs increased with rising fraction and reducing the size of B4C up to a certain level. Wear rate increases with rising applied load, sliding time and speed. A review of effect of B4C reinforcement on different properties of mono and hybrid AMCs with summarized results attained and concluded by different investigators is presented in this paper to help researchers in the field. At the end of this paper a position given to conclusions and future directions.

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“…Several techniques were adopted to produce magnesium based surface metal matrix composites (SMMCs) [3][4][5]. Friction stir processing (FSP) is one of such successful methods used for the development of surface composites [6][7][8][9][10][11][12]. FSP is a severe plastic deformation technique that allows the processing of materials within the solid state itself.…”

Section: Introductionmentioning

confidence: 99%

Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing

Patle

Sunil²,

Dumpala

2020

Mater. Res. Express

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In the present study, the surface of AZ91 Mg alloy was modified by incorporating boron carbide (B 4 C) particles using friction stir processing (FSP). Sliding wear behavior of these developed AZ91/B 4 C surface composites was investigated against AISI 52100 steel ball using linear reciprocating tribometer. Hardness tests reveal that the hardness of the fabricated surface composite (∼137.47 HV) is significantly increased compared to the base metal (∼95.5 HV) due to the presence of B 4 C particles.Wear tests were conducted on the samples at two different sliding velocities; 0.06 m s −1 and 0.12 m s −1 . It was observed that at higher sliding velocity of 0.12 m s −1 , AZ91/B 4 C surface composite exhibited lower friction coefficient value in comparison to that of the base metal, whereas it is vice versa at the low sliding velocity of 0.06 m s −1 . However, surface composites exhibited superior wear resistance at both the sliding velocities, in comparison to that of the base metal. Scanning electron microscopy and energy-dispersive spectroscopy analysis of the wear tracks were carried out to understand the wear mechanisms. From the observations, a combination of abrasive, adhesive, and oxidative wear mechanisms were found to be prominent.

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Hardness and sliding wear characteristics of AA7075-T6 surface composites reinforced with B₄C and MoS₂ particles

Cited by 31 publications

References 41 publications

Different reinforcement strategies of hybrid surface composite AA6061/(B₄C+MoS₂) produced by friction stir processing

Different reinforcement strategies of hybrid surface composite AA6061/(B₄C+MoS₂) produced by friction stir processing

Boron Carbide (B4C) Reinforced Aluminum Matrix Composites (AMCs)

Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing

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Hardness and sliding wear characteristics of AA7075-T6 surface composites reinforced with B4C and MoS2 particles

Cited by 31 publications

References 41 publications

Different reinforcement strategies of hybrid surface composite AA6061/(B4C+MoS2) produced by friction stir processing

Different reinforcement strategies of hybrid surface composite AA6061/(B4C+MoS2) produced by friction stir processing

Boron Carbide (B4C) Reinforced Aluminum Matrix Composites (AMCs)

Sliding wear behavior of AZ91/B4C surface composites produced by friction stir processing

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Product

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Hardness and sliding wear characteristics of AA7075-T6 surface composites reinforced with B₄C and MoS₂ particles

Different reinforcement strategies of hybrid surface composite AA6061/(B₄C+MoS₂) produced by friction stir processing

Different reinforcement strategies of hybrid surface composite AA6061/(B₄C+MoS₂) produced by friction stir processing

Sliding wear behavior of AZ91/B₄C surface composites produced by friction stir processing