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Experimental Investigation on the Synthesis of Al5086-GRN-ηSiC Hybrid Surface Composite using Additive Powder Fed Friction Stir Processing

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Title Experimental Investigation on the Synthesis of Al5086-GRN-ηSiC Hybrid Surface Composite using Additive Powder Fed Friction Stir Processing
 
Creator Raheja, Gagandeep Singh
Prakash, Chander
Sehgal, Shankar
 
Subject Al5086 alloy
Additive powder fed
Friction stir processing
Surfaces
Composite materials
Hardness
 
Description 305-313
In the current research work, graphene (GRN) and nano-silicon carbide (SiC) reinforced Al5086-alloy based hybrid
surface composites has been developed using a unique surface engineering technique called additive-powder-fed friction stir
processing (APF-FSP) process. Herein, the mechanical exfoliation of graphite into GRN has been carried out using
APF-FSP process to improve the microstructural and mechanical properties. The microstructure, morphology, and
mechanical properties of as-synthesized hybrid Al5086-GRN-ηSiC surface composite has been investigated. Microscopic
analysis has been conducted to scientifically ascertain the grain size, crystal structure and surface morphology of APF-FSP
zone. The mechanical properties such as hardness and elastic modulus have also been evaluated using nanoindentation and
micro-hardness technique. Nano-indentation and micro-pillar testing techniques have been used to assess mechanical
properties in terms of hardness, elastic modulus, and compressive strength of as-developed hybrid Al5086-GRN-ηSiC
surface composite. The best optimal condition to obtain the defect free structure is 1800 RPM rotational speed and 40
mm/min transverse speed with trapezoidal shape tool pin geometry. The microstructure and morphological examination
reveal that the grain size of Al-matrix gets refined from 30 μm to ~8 μm and reinforcements (GRN/ ηSiC) are uniformly
distributed in the matrix, which is expected to improve the mechanical properties. The SEM and TEM morphology analysis
show that the diphasic nano-mixture cluster of ηSiC and GRN in the range (100-200 nm) have been formed and GRP coexist
in multi-layer of atoms in Al-matrix owing to mechanical exfoliation of graphite. The highest hardness (145 HV0.3) and
tensile strength (385±5 MPa) have been obtained. Overall, findings of this work conclude that APF-FSP offers up new
possibilities for fabricating functionalized surface composites with improves mechanical properties for aerospace and
automobile industries.
 
Date 2023-06-22T09:47:00Z
2023-06-22T09:47:00Z
2023-06
 
Type Article
 
Identifier 0971-4588 (Print); 0975-1017 (Online)
http://nopr.niscpr.res.in/handle/123456789/62051
https://doi.org/10.56042/ijems.v30i2.1713
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJEMS Vol.30(2) [April 2023]