Metal matrix composites have been developed and are being used across all segments of the industry due to its advantages of higher specific strength, Young's modulus and enhanced wear properties. However the development of MMC through powder processing poses problems in achieving the required interface strength and near theoretical density especially during sintering. This paper is intended to understand the influence of processing parameters on the mechanical properties like sintered density and micro hardness. It has been observed that the compacting pressure and reinforcement percentage have higher impact than the sintering temperature on microhardness and density. Further to evaluate the fracture resistance strength, sintered composites have been subjected to static ball indentation. It has been observed that higher reinforcement and compacting pressure enhance the failure load while sintering temperature and time exert constrained influence. © 2013 Elsevier B.V. All rights reserved.

Umasankar V

Mechanical

School of Mechanical Engineering

Chennai Campus

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Journal of Alloys and Compounds

Aluminium alloy metal matrix composites (MMCs) have obtained wide spread acceptance in automotive and aerospace applications because of its high strength, low density and good structural rigidity. This work studies the mechanical and microstructural properties of hybrid metal matrix composite reinforced with Al2O3/SiC prepared by using powder metallurgy technique. Hardness and compressive strength of aluminum matrix composite increased with increase in wt% of SiC. The characterization results showed the improvement in mechanical properties with addition of hybrid reinforcement. © Published under licence by IOP Publishing Ltd.

Fulltext

IOP Conference Series: Materials Science and Engineering

Experimental investigations on mechanical and microstructural properties of Al2O3/SiC reinforced hybrid metal matrix composite

Metal matrix composites (MMC's) consist of a metallic matrix combined with dispersed graphene particulate phases as reinforcement. In this research work strength behaviour and tensile characteristics of 2900 alloy matrix composites produced by a powder metallurgy process are investigated as a function of microstructure-strength properties. Two different Samples of Al alloy composites are prepared using 0.25, 0.5 and 0.75 wt% of graphene. Rockwell hardness and tensile properties of these samples are investigated using Instron testing machine. The results indicated that tensile properties of the composites significantly improved in the UTS, on incorporation of hard, graphene particles. The analysis of strength behaviour has revealed that the strength improves significantly with increase in microwave sintering method and the graphene percentage. © 2017 Elsevier Ltd.

Materials Today: Proceedings

Heat Treating Studies of Graphene Reinforced Aluminium Metal Matrix Composite

Materials possessed with unexplored potential like, carbon allotropes have inexorably marched its way into the field of research. The current study focuses on the addition of various combinations of MWCNT in enhancing the mechanical properties of AA 2024 composites. The composite is processed through the ultrasonic liquid processor followed by compaction, sintering (Inert gas atmosphere) and hot extrusion. Micro hardness and X-ray diffraction analysis are done on developed composites. Further, tensile strength was determined on them according to ASTM standards in Instron Universal Testing Machine. Improvement in the strength and possible reasons for crack initiations and fracture surface were extensively analysed to study the effect of reinforcement's addition and its combinations in the aluminium alloy matrix. © 2017 Elsevier Ltd. All rights reserved.

Synthesis and property evaluation of hot extruded AA2024 –MWCNT Nanocomposites

In the recent years, enormous research has been carried out and reported on ceramic and carbon based reinforcement. Graphene, no wonder has attracted significant research interest due to its extensive physical properties at its single atomic thickness and 2-D morphology. The current studies focus on the role of Graphene in reducing the wear and frictional coefficient of Al 2024- SiC - Graphene reinforced hybrid composites. Reinforcement chosen is 4, 8 and 12 wt. % of SiC with 0.5 wt. % of Graphene to investigate the lubricating property under dry wear conditions and processed through the ultrasonication and ball milling. The processed mixtures are hot compacted and microwave sintered. Hardness, density, X-ray diffraction and flexural strength analysis were done on developed composites. The dry frictional wear test were carried out using pin-on-disc tribometer to evaluate the effect of Graphene and SiC content in the composite under various normal load and disc speed conditions. Further, wear resistance and a reduction in the coefficient of friction (Î¼) values compared to pure alloys were observed. Surface roughness values (Ra) and microscopic studies on wear tracks were carried out. The possible tribological potential coupled with improved mechanical properties and surface roughness of Al 2024- SiC - Graphene hybrid composite processed through powder metallurgy were discussed.

Procedia Engineering

Assessment of Mechanical and Tribological Properties of Al 2024- SiC - Graphene Hybrid Composites

Processing and Characterization Techniques of Graphene Reinforced Metal Matrix Composites (GRMMC); A Review

Knowledge of the performance of cutting fluids in machining different work materials is of critical importance in order to improve the efficiency of any machining process. The efficiency can be evaluated based on certain process parameters such as flank wear, surface roughness on the work piece, cutting forces developed, temperature developed at the tool chip interface, etc. The objective of this work is to determine the influence of cutting fluids on tool wear and surface roughness during turning of AISI 304 with carbide tool. Further an attempt has been made to identify the influence of coconut oil in reducing the tool wear and surface roughness during turning process. The performance of coconut oil is also being compared with another two cutting fluids namely an emulsion and a neat cutting oil (immiscible with water). The results indicated that in general, coconut oil performed better than the other two cutting fluids in reducing the tool wear and improving the surface finish. Coconut oil has been used as one of the cutting fluids in this work because of its thermal and oxidative stability which is being comparable to other vegetable-based cutting fluids used in the metal cutting industry. Â© 2008 Elsevier B.V. All rights reserved.

Journal of Materials Processing Technology

Determining the influence of cutting fluids on tool wear and surface roughness during turning of AISI 304 austenitic stainless steel

Materials Science Forum

Processing and Manufacturing of Metal Matrix Aluminum Alloys Composites Reinforced by Silicon Carbide and Alumina through Powder Metallurgy Techniques

Acta Materialia

Fabrication of Al6061 composite with high SiC particle loading by semi-solid powder processing

Materials Science and Engineering: A

Dimensional behaviour of aluminium sintered in different atmospheres

Key Engineering Materials

Comparison of Physical and Mechanical Properties of Cordierite Based Ceramics Produced from Natural Raw Materials and Synthetic Powders

Experimental evaluation of the influence of processing parameters on the mechanical properties of SiC particle reinforced AA6061 aluminium alloy matrix composite by powder processing

Journal	Data powered by TypesetJournal of Alloys and Compounds
Publisher	Data powered by TypesetElsevier BV
ISSN	0925-8388
Open Access	No