Functionally graded AZ91/WC nanocomposite fabricated via friction stir processing using a novel way

Functionally graded AZ91/WC nanocomposite fabricated via friction stir processing using a novel way

In this work, functionally graded AZ91/WC nanocomposites were prepared by a novel multi-step chamber diameter reduction method. The WC nanoparticles were packed into chambers with graded diameters and processed by friction stirring using a tool with four-sided grooved probe. The functionally graded...

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Bibliographic Details
Published in:Journal of mining and metallurgy. Section B, Metallurgy Vol. 58; no. 3; pp. 367 - 378
Main Authors: Subhi, A.D., Abdulkareem, M.H., Hussein, H.A.
Format: Journal Article
Language:English
Published: Bor Technical Faculty Bor, University of Belgrade 2022
Technical Faculty, Bor
Subjects:
Abrasive wear
Alloys
az91 mg alloy
Chemical vapor deposition
Composite materials
Corrosion
Corrosion rate
Corrosion resistance
Corrosive wear
Engineering
Friction stir processing
Friction stir welding
functionally graded composite
Functionally gradient materials
Hardness
Magnesium base alloys
Methods
nanocomposite
Nanocomposites
Nanoparticles
Powder metallurgy
Scanning electron microscopy
Spectrum analysis
tungsten carbide
Wear rate
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Summary:In this work, functionally graded AZ91/WC nanocomposites were prepared by a novel multi-step chamber diameter reduction method. The WC nanoparticles were packed into chambers with graded diameters and processed by friction stirring using a tool with four-sided grooved probe. The functionally graded nanocomposites were fabricated at different tool rotational speeds (830, 960 and 1160 rpm) at a constant traverse speed and plunge depth of 40 mm/min and 0.1 mm, respectively. The properties of the functionally graded samples and AZ91 Mg alloy were evaluated by optical and scanning electron microscopy, energy dispersive spectroscopy, and other tests such as hardness, pin on disc wear and potentiodynamic polarization tests. The results showed that ?-Mg and graded distribution of WC nanoparticles improved as the tool rotational speed increased. The hardness increased slightly with increasing the rotational speed of the tool. The results also revealed that the wear rate was decreased and corrosion resistance was improved by adding WC nanoparticles. Abrasive wear mode was the main mode of material removal during dry sliding, while cracks and pits were the main features of the corroded surface.
ISSN:1450-5339
2217-7175
DOI:10.2298/JMMB220322018S