Investigation of Mechanical Properties and Microstructure of Pure Al-SiC-Nanocomposite Casted by Stir-Squeeze Casting Process

2018 ◽  
pp. 61-70
Author(s):  
Pooja Verma ◽  
Prabha Kumari ◽  
Joyjeet Ghose ◽  
Vijay Pandey
Keyword(s):  
Mechanical Properties ◽  
Squeeze Casting ◽  
Casting Process ◽  
Squeeze Casting Process

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.

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.

Sign in / Sign up

Export Citation Format

Share Document