A study on kerf characteristics of hybrid aluminium 7075 metal matrix composites machined using abrasive water jet machining technology

2016 ◽  
Vol 232 (4) ◽  
pp. 690-704 ◽  
Author(s):  
KSK Sasikumar ◽  
KP Arulshri ◽  
K Ponappa ◽  
M Uthayakumar
Keyword(s):  
Electron Microscopy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Traverse Speed ◽  
Water Jet ◽  
Matrix Composites ◽  
Abrasive Water Jet ◽  
Abrasive Water Jet Machining ◽  
Kerf Angle ◽  
Scanning Electron

Metal matrix composites are difficult to machine in traditional machining methods. Abrasive water jet machining is a state-of-the art technology which enables machining of practically all engineering materials. This article deals with the investigation on optimization of process parameters of abrasive water jet machining of hybrid aluminium 7075 metal matrix composites with 5%, 10% and 15% of TiC and B4C (equal amount of each) reinforcement. The kerf characteristics such as kerf top width, kerf angle and surface roughness were studied against the abrasive water jet machining process parameters, namely, water jet pressure, jet traverse speed and standoff distance. Contribution of these parameters on responses was determined by analysis of variance. Regression models were obtained for kerf characteristics. Contribution of traverse speed was found to be more than other parameters in affecting top kerf width. Water jet pressure influenced more in affecting kerf angle and surface finish. The microstructures of machined surfaces were also analysed by scanning electron microscopy. The scanning electron microscopy investigations exposed the plastic deformation cutting of hybrid 7075 aluminium metal matrix composite. X-ray diffraction analysis results proved the non-entrapment of abrasive particle on the machined surface.

Abrasive Water Jet Machining of Aluminum-Silicon Carbide Particulate Metal Matrix Composites

2015 ◽  
Vol 830-831 ◽  
pp. 83-86 ◽  
Author(s):  
B. Arul Kumar ◽  
G. Kumaresan
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Stir Casting ◽  
Ceramic Particle ◽  
Water Jet ◽  
Machining Process ◽  
Matrix Composites ◽  
Abrasive Water Jet ◽  
Abrasive Water Jet Machining ◽  
Silicon Carbide Particulate

Particle Reinforced Metal Matrix Composites (PRMMC's) have proved to be extremely difficult to machine using conventional manufacturing processes due to heavy tool wear caused by the presence of the hard reinforcement. This paper presents details and results of an investigation into the machinability of SiC particle reinforced aluminium matrix composites using Abrasive Water Jet Machining (AWJM). Al-SiC MMC specimens, prepared with stir casting method. The surface roughness of the composite material for these different compositions are examined and compared. The influence of the ceramic particle reinforcement on the machining process was analyzed.

Mach inability Studies on Metal Matrix Composite’s Using Abrasive Water Jet Machining

2019 ◽  
Vol 1 (1) ◽  
pp. 24-33
Author(s):  
Kalai selvan M.C. ◽  
Hendry Thomas X ◽  
Siddharthan B ◽  
Divya Kumar P
Keyword(s):  
Metal Matrix Composites ◽  
Flow Rate ◽  
Metal Matrix ◽  
Water Pressure ◽  
Mesh Size ◽  
Stir Casting ◽  
Water Jet ◽  
Matrix Composites ◽  
Abrasive Water Jet ◽  
Electron Microscopic

The non-traditional machining of particulate reinforced metal matrix composites is relatively new. This paper covers studies on match inability of aluminium - Boron carbide metal matrix composites (Al-B4C MMCs) with abrasive water jets (AWJs). Two different compositions of Al-B4C MMCs were processed with various mesh size, abrasive flow rate, transverse rate and water pressure with a view to identify the performance of the abrasive water jet machine for effective processing of MMCs with AWJs. The maximum penetration ability of AWJs in different MMCs was examined by conducting the experiments on trapezoidal shaped Al-B4C MMC specimens, prepared with stir casting method. Optical micrographs of MMC samples and scanning electron microscopic (SEM) examination of AWJ cut surfaces enabled to explain the trends of material removal by the abrasives. Analysis of results clearly indicated the choice of 80 mesh size abrasives, higher water pressure and flow rate and lower transverse rate for effective processing of Al-B4C MMCs with AWJs.

scholarly journals Characterization of Al-SiO2 Composite Material

2019 ◽  
Vol 9 (2) ◽  
pp. 2972-2975
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Aluminum Metal ◽  
Aluminum Metal Matrix Composites ◽  
Beam Diffraction ◽  
Scanning Electron

The present investigation centers at assessing the mechanical properties of Aluminum within the sight of Silicon di-oxide, and their blends. The creations were signified the necessary level and mix throwing technique was utilized for the improvement of Aluminum Metal Matrix Composites. Basic portrayals were done on Metal Matrix Composites by X-beam diffraction techniques and Field Emission Scanning Electron Microscopy (FE-SEM) was utilized for the miniaturized scale basic examinations. The tests for mechanical properties of metal lattice composites like tensile quality and Hardness were done. Within the sight of Silicon di-oxide (0-10%) with Aluminum grid, it was clear that the densities of the composites were diminished and the hardness was expanded. Correspondingly, a decline in rigidity additionally had been seen with decline in support in the Metal Matrix. The SEM examination completed for contemplating the Material Morphology has likewise been emerged in this investigation

Influences of Strontium Addition and Whisker Content on Solidification Behavior of SiCw/Al-18Si Metal Matrix Composites

2006 ◽  
Vol 15-17 ◽  
pp. 251-254
Author(s):  
Hong Mei Wei ◽  
Lin Geng ◽  
Xue Xi Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Solidification Behavior ◽  
Primary Si ◽  
Transmission Electron ◽  
Scanning Electron

Solidification behavior of SiCw/Al-18Si metal matrix composites (MMCs) was studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimeter (DSC) in order to reveal the effects of strontium addition and whisker content. The results show that the Si phase does not nucleate on SiC whisker surface. With the increasing of SiC whisker content, solidification onset and peak temperatures of primary Si decrease. Sr addition lowers solidification onset and peak temperatures of primary Si, and reduces its size. Whisker content has larger effects on solidification onset and peak temperatures of primary Si without Sr addition than that of primary Si with Sr addition.But solidification onset and peak temperatures of eutectic are barely affected by whisker content and Sr addition.

The role of TEM in the development of advanced materials

1990 ◽  
Vol 48 (4) ◽  
pp. 176-177
Author(s):  
M H Loretto
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Advanced Materials ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
The Matrix ◽  
Scanning Electron

In general the microstructural assessment of advanced materials can be satisfactorily assessed using optical and scanning electron microscopy together with X-ray diffraction. Transmission electron microscopy (TEM) is used only when the scale and nature of the information which can be obtained from TEM is appropriate. The aim of the present article is to highlight some examples of the unique role that TEM has played in the field of structural materials. Four areas will be discussed: metal matrix composites; precipitation in Al-Li based alloys; rapid solidification; intermetallics.In the field of metal-matrix composites one of the most important aspects is nature of the bonding and interaction between the reinforcement and the matrix, and this is an area where the spatial resolution of analytical TEM is required in order to characterise any interaction. The recent work on Ti6A14V/TiC and Ti24All INb/TiC composites has illustrated this very clearly. Even after heat treatments of 50h at 1100°C the TiC appears to be unaffected as assessed by both optical and scanning electron microscopy. Only when TEM is used is it possible to see that there has been any interaction.

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