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Influence of TAC/TI/Si3N4 on mechanical and corrosion performance of AA7075 alloy matrix composite processed by stir processing route

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Title Influence of TAC/TI/Si3N4 on mechanical and corrosion performance of AA7075 alloy matrix composite processed by stir processing route
 
Creator Kumar, J Pradeep
Smart, D S Robinson
Saxena, Kuldeep Kr
 
Subject Corrosion
Fatigue
Flexural
Mechanical behaviour
Stirring
Tantalum Carbide
 
Description 355-365
In modernistic years, Metal Matrix Composites (MMCs) are becoming enchanting in fields of aerospace, military,
defence and automobile applications reason being they offer merit such as high strength to weight proportion, good
tribological, good corrosion resistance, excellent fatigue and creep performance and good bending behaviour etc. In the
current research, an attempt was made to synthesize AA7075 blended with distinct wt% of Titanium (Ti), Tantalum Carbide
(TaC) and Silicon Nitride (Si3N4) multi hybrid MMCs were examined. Microstructural, flexural, corrosion and low cycle
fatigue aspects of the developed multi hybrid MMCs were examined as per ASTM standard. The brittleness of Si3N4, TaC
and Ti particulates structured with the interface betwixt matrix culminates in increment in the flexural strength of the
composite. The bending analysis clearly shows that, TaC and Si3N4 are the major contributing materials for flexural aspect
because the presence of hard ceramic particulates restricts the dislocation movement by providing additional strength.
Microstructural analysis reveals the existence of reinforcements. Also, homogeneous dissemination and good interfacial
bonding betwixt the matrix and reinforcement particulates were noticed. AA7075 reinforced with 1 wt% Ti, 6 wt% Si3N4
and 0.5 wt% TaC operated at higher load (1500 N) and higher number of cycles 14103 cycles with a stable strain rate. The
number of cycles to failure was observed to be enhanced for the matured composites on account of an inconsequential
percentage of induced plastic strain.
 
Date 2022-07-06T09:21:22Z
2022-07-06T09:21:22Z
2022-07
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscpr.res.in/handle/123456789/60066
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJEMS Vol.29(3) [June 2022]