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

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.

Development of Metal Matrix Nanocomposites of AA6061 – SiCp Using Ultrasonic Cavitations in Squeeze Casting Process

2015 ◽  
Author(s):  
Mohan Bangaru ◽  
Thirumal Azhagan Murugan ◽  
Rajadurai Arunachalam
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Metal Matrix ◽  
Squeeze Casting ◽  
Casting Process ◽  
Volume Percentage ◽  
Metal Matrix Nanocomposites ◽  
Matrix Nanocomposites ◽  
Squeeze Casting Process

In the recent days, aerospace, automotive and defense sectors have been the main driving force behind the search of lighter and stronger materials in order to use in the production of vehicles. The growing demand for the production of light weight structural components and systems is fulfilled by the development of innovative metallic materials such as composites and alloys particularly based on aluminium because of their desirable properties such as low density, good castability, excellent strength and excellent corrosion resistance. Widely employed processes such as gravity and pressure die casting are used for processing aluminium alloys but the components exhibit several casting defects such as porosity, cracks, segregation and hot tears etc. This drives the industries to develop new processes which produce defect free components in shorter time as they have been under competitive pressure. Of the many such processes, squeeze casting has good capacity to produce less defective components. Squeeze casting is the process in which the molten metal solidifies under the application of pressure. The development of Aluminium Matrix Composites (AMCs) through squeeze casting has been one of the major areas of research in recent times. Research works on AMCs reinforced with micrometric particles have shown that the ability to strengthen the matrix alloy by them is lesser than nanometric particles. Metal matrices reinforced with nanoparticles are characterized by significant improvement in strength and wear resistance, improved ductility and improved dimensional stability at elevated temperatures. But, nanosized ceramic particles constitute problems during fabrication as it is extremely difficult to obtain uniform dispersion of nanoparticles in liquid metals owing to their high viscosity, poor wettability in the metal matrix, and a large surface-to-volume ratio. These problems induce agglomeration and clustering of nanoparticles. The nanoparticles can be dispersed uniformly in the metal matrix by means of employing ultrasonic cavitations. Ultrasonic cavitations include the formation, growth and collapse of micro-bubbles in liquids, under cyclic high intensity ultrasonic waves. The cavitation bubbles collapse and generate a huge amount of energy, which could be used in dispersion of the nanoparticles more uniformly in the melt. In this study, squeeze casting is combined with ultrasonic cavitations to develop Metal Matrix Nanocomposites (MMNCs) of AA6061 – SiCp as a maiden attempt. The impact of varying volume percentage of SiCp nanoparticles (average size of 45 nm – 65 nm) by ultrasonic cavitations on mechanical properties such as ultimate tensile strength and hardness exhibited by MMNCs were analyzed. In this research, volume percentage of SiCp nanoparticles was varied at 0.4%, 0.8% and 1.2% respectively by employing ultrasonic vibrations at the amplitude of 70 μm to the melt of AA6061. The melt of AA6061-SiCp was poured into the pre heated die cavity and squeeze pressure of 105 Mpa was applied over it for a certain period while developing MMNCs. Scanning Electron Microscope (SEM) images showed the uniform distribution of SiCp nanoparticles in AA6061 matrix. Energy Dispersive Spectroscopy (EDS) in SEM confirmed the incorporation of SiCp in AA6061 matrix. The obtained results confirmed the effectiveness of ultrasonic cavitations in squeeze casting process to disperse the nanoparticles of SiCp uniformly in AA6061 matrix. The mechanical properties of MMNCs such as ultimate tensile strength and hardness exhibited an increasing trend with respect to the increase in volume percentage of SiCp nanoparticles. Thus there prevails a great scope to develop MMNCs of aluminium using ultrasonic cavitations in squeeze casting process.

Influence of Ti to the Microstructure and Mechanical Properties of Al-12Si-3.2Cu-1Mg-2.4Ni Piston Alloy

2013 ◽  
Vol 477-478 ◽  
pp. 1278-1283
Author(s):  
Ling Zhan Zhou ◽  
Yin Jiang Peng ◽  
Xiu Rong Zhu ◽  
Guang Ming Zhang ◽  
Li Ming Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Squeeze Casting ◽  
Casting Process ◽  
Optical Microscope ◽  
Heat Treated ◽  
Eutectic Si ◽  
Squeeze Casting Process ◽  
Ti Addition

Al-12Si-3.2Cu-1Mg-2.4Ni-χTi (χ=0, 0.2) alloys were prepared by squeeze casting process, and then heat-treated. The mechanical properties were tested at 350°C, the microstructure and phases in them were investigated by optical microscope, SEM, EDS and XRD. It is found that the grain size has an obvious increment after 0.2 wt. % Ti additions to Al-12Si-3.2Cu-1Mg-2.4Ni, and the ultimate tensile strength at elevated-temperature increased accordingly. Intermetallic compounds, such as γ-Al7Cu4Ni, M-Mg2Si, Q-Al5Cu2Mg8Si6 and δ-Al3CuNi existing in alloys with and without Ti addition. Needle-like Ti containing phase with the elements of Al, Si and Ti created in Al-12Si-3.2Cu-1Mg-2.4Ni-0.2Ti alloy, and the eutectic Si is found to distribute by the side of Ti containing phase.

Experimental Investigation on the Effect of Casting Parameters on Thin walled Castings of Metal Matrix (LM21-SiC) Composite

2017 ◽  
Vol 13 (9) ◽  
pp. 6468-6474
Author(s):  
Venkatesh L ◽  
T.V. Arjunan ◽  
M. Arulraj
Keyword(s):  
Process Parameters ◽  
Metal Matrix ◽  
Squeeze Casting ◽  
Casting Process ◽  
Primary Objective ◽  
Casting Condition ◽  
Melt Temperature ◽  
Squeeze Pressure ◽  
Reinforcement Percentage ◽  
Squeeze Casting Process

 Metal matrix composites (MMCs) are widely used in several applications owing to their high strength, high specific stiffness, greater wear resistance and light weight. Normally, MMCs are processed through stir casting which exhibits poor wet ability and bonding between metal matrix and ceramic reinforcement, porosity and hot tears. These drawbacks can be overcome by squeeze casting process. Here an attempt was made on processing LM21-Sic composite for making hollow casting through squeeze casting process. Four process parameters are chosen namely squeeze pressure, stirring speed, melt temperature and reinforcement percentage. The primary objective was to experimentally investigate the influence of casting parameters on hardness & wear. Samples were cast for each experiments condition based on L9 orthogonal array. From the analysis of variance (ANOVA), it was observed that stirring speed, reinforcement percentage and Squeeze load were the process parameters making a noticeable improvement in hardness and wear. The mechanical properties such as hardness and wear are evaluated and optimum casting condition was obtained.

Influence of Squeeze Pressure on the Mechanical Properties of Squeeze Cast Aluminium Alloy AA6061

2014 ◽  
Vol 984-985 ◽  
pp. 350-354 ◽  
Author(s):  
M. Thirumal Azhagan ◽  
B. Mohan ◽  
A. Rajadurai ◽  
S. Maharajan
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
Squeeze Casting ◽  
Casting Process ◽  
Processing Technique ◽  
Preheat Temperature ◽  
Squeeze Pressure ◽  
Squeeze Cast ◽  
Squeeze Casting Process ◽  
Alloy 6061

Squeeze casting is a hybrid metal processing technique that combines the advantages of both casting and forging in one operation. The automotive and aerospace sectors are behind the development of squeeze casting process as the squeeze cast components exhibit improved mechanical properties. The Aluminium alloy 6061 is a futuristic material that is widely used to produce automotive and aerospace components. In this attempt, cylindrical components of AA6061 were produced by varying the squeeze pressure at certain levels when the die preheat temperature and the pressure applied duration were maintained at constant levels. The specimens were made from the components as per ASTM standards and they were tested for mechanical properties such as impact strength and micro hardness respectively. It was found that the mechanical properties were enhanced with the increase in squeeze pressure.

Experimental Study of Squeeze Casting of Aluminium Alloy AA6061

2015 ◽  
Vol 766-767 ◽  
pp. 422-426 ◽  
Author(s):  
M. Thirumal Azhagan ◽  
B. Mohan ◽  
A. Rajadurai
Keyword(s):  
Tensile Strength ◽  
Fatigue Life ◽  
Squeeze Casting ◽  
Casting Process ◽  
Technical Process ◽  
Preheat Temperature ◽  
New Production ◽  
Squeeze Pressure ◽  
High Integrity ◽  
Squeeze Casting Process

The squeeze casting of aluminium alloys is a rapidly developing technical process that offers the potential for widespread utilization and growth. Squeeze casting process is the result of search of new production processes which are capable of producing components with high integrity. Squeeze casting also called as liquid metal forging combines the advantages of both casting and forging in one operation. Squeeze casting process is suited for all melting ranges of metals. But nowadays, light weight materials like aluminium and magnesium are mostly used in the aerospace and automotive industries. In this attempt, Squeeze casting of AA6061 was done by varying the process parameters such as squeeze pressure at three levels(40 MPa, 80 MPa and 120 MPa) , die preheat temperature at 200 °C and pressure applied duration at 15 seconds respectively and the components were produced. The specimens were made from these components and they were tested for tensile strength and fatigue life. It was observed that the tensile strength and fatigue life exhibited by the components were enhanced with the increase in squeeze pressure.

scholarly journals Development of Specially Reinforced Magnesium Composites Prepared by Squeeze Casting Process

2021 ◽  
Author(s):  
Akshansh Mishra ◽  
Devarrishi Dixit ◽  
Raheem Al-Sabur
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Squeeze Casting ◽  
Casting Process ◽  
Matrix Composites ◽  
Structural Applications ◽  
Squeeze Casting Process ◽  
Magnesium Composites

A wide range of opportunities in the field of automotive and structural applications are being offered by Magnesium matrix composites because of their enhanced mechanical properties. Magnesium alloys based Metal Matrix Composites (MMCs) are the best candidates for lightweight structural applications due to their improved creep properties. In the present study, three specimens of specially reinforced magnesium composites were manufactured by using the squeeze casting process. Specimen 1 has a composition of 7 % aluminum alloy in addition to 1% zinc and the composition of reinforcement is Titanium Carbide 0.3 % in addition to 1.5% Carbon nanotubes. Specimen 2 has a composition of 12 % aluminum alloy in addition to 1 % zinc and the composition of reinforcement is 2% B_4 C in addition to 2 % Carbon nanotubes. Specimen 3 has a composition of 14 % aluminum alloy in addition to 1 % zinc and the composition of reinforcement is 2 % B_4 C in addition to 2 % Carbon nanotubes. The mechanical properties analysis showed that specimen 2 has a higher hardness value in comparison to other manufactured specimens and it was also observed that specimen 2 possesses a higher tensile strength value in comparison to the other two specimens. Microstructure analysis shows that there was a uniform distribution of the reinforcements in the matrix. So it can be inferred that this uniform distribution causes higher hardness and higher tensile strength in the manufactured specimens.

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