Drilling of hybrid metal matrix composites : Workpiece surface integrity

Abstract The main concern in the present study is the surface roughness variations on the drilled surface and extension of surface and sub-surface deformation due to drilling. The influence of different tools and cutting conditions on Al2219/15%SiCp and Al2219/15%SiCp-3%Graphite (hybrid) composites is investigated experimentally. The composites are fabricated by liquid metallurgy method. The drilling tests are conducted with carbide and coated carbide tools. The surface roughness decreases with the increase in cutting speed and increases with the increase in feed rate. The surface is analyzed using scanning electron microscope (SEM). Microhardness profiles indicate that the subsurface deformation extends up to a maximum of 120 μm below the machined surface for Al2219/15SiCp-3Gr composite when compared to 150 μm in Al2219/15SiCp composite.

[1]  M. Kok,et al.  Tool wear and surface roughness of Al2O3 particle-reinforced aluminium alloy composites , 2002 .

[2]  M. Muratoğlu,et al.  The drilling of an Al/SiCp metal-matrix composites. Part I: microstructure , 2004 .

[3]  B. M. Girish,et al.  Mechanical properties of as-cast and heat-treated ZA-27/graphite particulate composites , 1997 .

[4]  S. Barnes,et al.  Through-Tool Coolant Drilling of Aluminum/SiC Metal Matrix Composite , 2000 .

[5]  Y. Zhan,et al.  The role of graphite particles in the high-temperature wear of copper hybrid composites against steel , 2006 .

[6]  J. Monaghan,et al.  The drilling of an Al/SiC metal-matrix composite , 1992 .

[7]  M. M. Barash,et al.  The Mechanical State of the Sublayer of a Surface Generated by Chip-Removal Process—Part 2: Cutting With a Tool With Flank Wear , 1976 .

[8]  S. Jeelani,et al.  Surface Integrity in Machining AISI 4340 Steel , 1976 .

[9]  David K. Aspinwall,et al.  The effect of machined topography and integrity on fatigue life , 2004 .

[10]  A. Riahi,et al.  The role of tribo-layers on the sliding wear behavior of graphitic aluminum matrix composites , 2001 .

[11]  Yuebin Guo,et al.  Microscale Mechanical Behavior of the Subsurface by Finishing Processes , 2005 .

[12]  S. Basavarajappa,et al.  Wear Studies on Metal Matrix Composites: a Taguchi Approach , 2009 .

[13]  A. Needleman,et al.  Fundamentals of metal-matrix composites , 1993 .

[14]  Marek Balazinski,et al.  Machinability of Graphitic Metal Matrix Composites as a Function of Reinforcing Particles , 1999 .

[15]  Gul Tosun,et al.  The drilling of Al/SiCp metal–matrix composites. Part II: workpiece surface integrity , 2004 .

[16]  M. Sklad,et al.  Machining of Al/SiC particulate metal matrix composites: Part II: Workpiece surface integrity , 1998 .

[17]  Mamidala Ramulu,et al.  Drilling of (Al2O3)p/6061 metal matrix composites , 2002 .

[18]  J. Grum,et al.  Influence of microstructure on surface integrity in turning—part I: the influence of the size of the soft phase in a microstructure on surface-roughness formation , 2003 .

[19]  Farghalli A. Mohamed,et al.  Particulate reinforced metal matrix composites — a review , 1991, Journal of Materials Science.