An investigation on the hardness and corrosion behavior of MWCNT/Mg composites and grain refined Mg

An investigation on the hardness and corrosion behavior of MWCNT/Mg composites and grain refined Mg

Saikrishna, N. (Bhabha Atomic Research Centre; Rajiv Gandhi University of Knowledge Technologies (AP-IIIT))
Reddy, G. Pradeep Kumar (Vignana Bharathi Institute of Technology)
Munirathinam, B. (TU Delft (OLD) MSE-6; Indian Institute of Technology Madras)
Dumpala, Ravikumar (Visvesvaraya National Institute of Technology (VNIT))
Jagannatham, M. (Bhabha Atomic Research Centre)
Ratna Sunil, B. (Rajiv Gandhi University of Knowledge Technologies (AP-IIIT))

2018

In the present work, multi walled carbon nanotubes (MWCNT) reinforced magnesium (Mg) matrix composite was fabricated by friction stir processing (FSP) with an aim to explore its mechanical and electrochemical behavior. Microstructural observations showed that the thickness of the produced composite layer was in the range of 2500 μm. FSP resulted uniform distribution of CNT near the surface while agglomerated layers in the subsurface. Grain refinement of Mg achieved by FSP improved the hardness but significant enhancement in the hardness value was observed for FSPed MWCNT/Mg composites. Potentiodynamic polarization studies revealed that the increase in corrosion current density was observed for MWCNT/Mg composite compared with grain refined Mg and pure Mg, implying the significance of secondary phase (MWCNT) in decreasing the corrosion resistance of the composite.

Basal texture
Corrosion resistance
Friction stir processing
Hardness
MWCNT/Mg composite

http://resolver.tudelft.nl/uuid:2ba24db2-7604-41cf-b492-c3306e65c52d

https://doi.org/10.1016/j.jma.2017.12.003

2213-9567

Journal of Magnesium and Alloys, 6 (1), 83-89

Institutional Repository

journal article

© 2018 N. Saikrishna, G. Pradeep Kumar Reddy, B. Munirathinam, Ravikumar Dumpala, M. Jagannatham, B. Ratna Sunil