Correlation of abrasive wear with microstructure and mechanical properties of pressure die-cast aluminum hard-particle composite.
IR@AMPRI: CSIR-Advanced Materials and Processes Research Institute, Bhopal
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Title |
Correlation of abrasive wear with microstructure and mechanical properties of pressure die-cast aluminum hard-particle composite.
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Creator |
S , Das
D.P., Mondal |
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Subject |
Tribology
Archeometallurgy Material/Component Development, Processing and Characterization |
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Description |
Aluminum hard particle composites were synthesized by the solidification processing technique and
the composite melt was solidified using gravity and pressure die castings. An aluminum-silicon alloy
(A 332.1) has been used as the matrix and silicon carbide particles (quantity: 10 wt pct, and size: 50
to 80 mm) have been used as reinforcement for synthesis of the composite. The microstructure of the
pressure die cast composite is found to be finer than those of the gravity cast ones. Additionally, the
distribution of SiC particles in the Al alloy matrix is found to be more uniform in the pressure diecast
composites compared to the gravity die-cast ones. The mechanical properties such as ultimate
tensile strength, hardness, and ductility are observed to be superior in the case of pressure die-cast
composites compared to the gravity-cast one. The two-body abrasive wear resistance of the Alcomposite
is also noted to be greater in the pressure die-cast composite than in the gravity-cast one.
The effects of injection pressure on the mechanical properties and wear resistance of the pressure
die-cast composites are examined. It is observed that the wear resistance (inverse of wear rate),
hardness, and strength of the Al-SiC composites increase with the increase in injection pressure during
pressure die casting. This may be due to the finer microstructure, the absence of casting defects, and
the stronger interfacial bonding between the matrix and hard dispersoid in pressure die-cast composites.
The wear rate of the alloys and composites is studied as a function of their hardness, strength, and
Young’s modulus. It is noted that the wear rate is primarily controlled by hardness even though other
mechanical properties influence the wear behavior of the materials to some extent. An attempt is
made to establish an empirical relation to correlate the wear rate of material with the mechanical
properties such as hardness, ultimate tensile strength, and elongation.
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Date |
2001
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Type |
Article
PeerReviewed |
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Format |
application/pdf
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Identifier |
http://ampri.csircentral.net/1065/1/1.pdf
S , Das and D.P., Mondal (2001) Correlation of abrasive wear with microstructure and mechanical properties of pressure die-cast aluminum hard-particle composite. Met. And Mat. Transactions. |
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Relation |
http://ampri.csircentral.net/1065/
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