Qualitative and quantitative assessment of microstructure in Al-B4C metal matrix composite processed by modified stir casting technique

Raj, R. Edwin; Thakur, D. G.

doi:10.1016/j.acme.2016.07.004

Cited by 72 publications

(17 citation statements)

References 32 publications

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“…Aluminium alloys have been gaining greater attention as the matrix of MMCs due to their unique physical and mechanical properties [5][6][7][8][9]. Much research has been conducted to improve the structural and mechanical properties of the aluminium matrix nano composites (AMNCs) by the addition of submicron and nano-sized particles as reinforcement [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical properties of in situ aluminium matrix composites reinforced by alumina nanoparticles

Afkham

Khosroshahi

Rahimpour

et al. 2018

Archives of Civil and Mechanical Engineering

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In-situ fabrication of metal matrix nano composites has various advantages such as the formation of clean particle-metal interface with strong bonding. In this study, three types of metal oxides powders (commercial TiO2, commercial ZnO, and recycled Pyrex) were used to inject into the pure aluminium melt to fabricate in-situ aluminium matrix nano composites via liquid-state stir casting at 850 °C followed by a hot rolling process. SEM and FESEM microstructural characterizations, as well as EDAX analysis, were used to show if in-situ reactions occurred between molten aluminium and metal oxides to form nano alumina particles as the reinforcement. Tensile and microhardness tests were also applied on the rolled nano composites to identify the effect of metal oxide type and amount on the mechanical properties. It was found that using recycled Pyrex crushed powders led to the formation of a uniform distribution of alumina nanoparticles, while fine-micron ZnO and especially TiO2 powders could not be uniformly distributed into the melt for complete reaction occurrence.

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Section: Introductionmentioning

confidence: 99%

Enhanced mechanical properties of in situ aluminium matrix composites reinforced by alumina nanoparticles

Afkham

Khosroshahi

Rahimpour

et al. 2018

Archives of Civil and Mechanical Engineering

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“…Sample 3 lower wear rate is linked to the high hardness and strength of boron carbide that presents inferior properties in abrasive resistance [48], therefore promoting lower wear resistance. Further, the higher weight loss of composite from sample 2 during the ball-on-disc test could be caused by the abrasive wearing due to micro-cutting or ridging along with spalling of SiC hard particles out of the composite matrix (intensifying the wear process) [49]. Analysis of the sample 3 proves the distribution of boron carbide evenly throughout the aluminium matrix (see Fig.…”

Section: Wear Testmentioning

confidence: 95%

A comparative study of the mechanical and tribological behaviours of different aluminium matrix–ceramic composites

Hynes¹,

Sankaranarayanan²,

Tharmaraj

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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Aluminium matrix composites (AMCs) have great potential for critical applications within aerospace, automotive, defence, marine, agriculture and nuclear engineering sectors. The composite materials are very attractive because of their good balance between lightweight versus high strength and machinability. Depending on the particular application, these properties can be further enhanced by adding silicon carbide, boron carbide and graphite, respectively. These reinforcements help to upscale the physical/mechanical properties in order to meet the novel industrial demand. In the present work, a novel hybrid composite is developed through stir cast welding technique. The novel materials manufactured are of great importance, because they exhibit higher mechanical properties and better wear resistance with respect to classical materials (i.e. pure aluminium). The results of mechanical test showed that the addition of 5% boron carbide content to aluminium matrix permits to enhance the tensile properties, shear strength and hardness values; 6% silicon carbide and 4% graphite allow to improve the flexural strength and wear rate, respectively. The best performance was obtained for aluminium composite with 5 wt% boron carbide. The correlation between industrial requirements and the findings from this research indicates that the newly developed composite is an excellent candidate material for structural neutron absorber, armour plate and as a substrate material for computer hard discs.

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“…Bottom pouring is observed to be more advantageous as it enables instant pouring of the composite mixture in the moulds, avoiding unwanted particle settling at the bottom of the graphite (Gr) crucible. [126,179,[185][186][187]…”

Section: Various Attributes Of Stir Casting Techniquementioning

confidence: 99%

“…Stir casting in inert environment with bottom pouring. [186] Figure 27. Disintegrated melt deposition.…”

Section: Fluxing Agentmentioning

confidence: 99%

A Critical Review on Synthesis of Aluminum Metallic Composites through Stir Casting: Challenges and Opportunities

2020

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Aluminum metallic composites (AMCs) have been recognized as promising material exhibiting excellent functional and structural properties that can be significantly tailored to meet the industrial demands as well as to meet the design criteria for many applications such as aerospace, automobiles, marine, defense, and so on. Herein, an effort is made to provide an extensive overview of the various processing techniques adopted for the development of AMCs. Various processing kinetics of stir casting technique are elaborated comprehensively in terms of existing challenges, conceivable modifications incorporated in it. Considering the critical assessment on mechanical properties made through various kinds of literature, an electromagnetic stir-squeeze casting synergically equipped with ultrasonic transducing probe and bottom pouring attachments is recommended as the most appropriate processing technique for the development of AMCs. Moreover, appropriate recommendations regarding process variables and additives/modifiers, and potential future research opportunities are also addressed significantly to encourage the ongoing and upcoming researchers, which lead this critical Review toward novelty and uniqueness.

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Qualitative and quantitative assessment of microstructure in Al-B4C metal matrix composite processed by modified stir casting technique

Cited by 72 publications

References 32 publications

Enhanced mechanical properties of in situ aluminium matrix composites reinforced by alumina nanoparticles

Enhanced mechanical properties of in situ aluminium matrix composites reinforced by alumina nanoparticles

A comparative study of the mechanical and tribological behaviours of different aluminium matrix–ceramic composites

A Critical Review on Synthesis of Aluminum Metallic Composites through Stir Casting: Challenges and Opportunities

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