Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite

Magnesium (Mg) has been used for many decades in various applications. This metal has attractive mechanical properties such as strength and hardness. Although Mg is lightweight and has high strength, one of the major limiting factors in using Mg includes its corrosion resistance. In the natural envi...

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Main Author:	Abang Mohamad Harith, Beniamin
Format:	Thesis
Language:	English English English
Published:	2023
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://ir.unimas.my/id/eprint/43248/3/Abg%20M.%20Harith_dsva.pdf http://ir.unimas.my/id/eprint/43248/5/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin%20-%2024%20pages.pdf http://ir.unimas.my/id/eprint/43248/7/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin.ftext.pdf
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spelling	my-unimas-ir.432482024-07-10T02:46:36Z Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite 2023-10-30 Abang Mohamad Harith, Beniamin TJ Mechanical engineering and machinery TN Mining engineering. Metallurgy Magnesium (Mg) has been used for many decades in various applications. This metal has attractive mechanical properties such as strength and hardness. Although Mg is lightweight and has high strength, one of the major limiting factors in using Mg includes its corrosion resistance. In the natural environment, the poor corrosion resistance of Mg and Mg alloys in saline and physiological environments remains a constant threat for Mg and Mg alloys as potential automotive parts, aerospace materials or biomedical implants. This research is done to study the hardness and corrosion properties of Mg and Mg-based composites. The hardness was determined using the Vickers microhardness test. Based on the results, Mg0.2%Mn%6%Zn-1% GNPs had the highest hardness at 48 HV, followed by Mg0.2%Mn%6%Zn-0.5% GNPs at 45 HV, Mg0.2%Mn%6%Zn at 44 HV, and HP Mg at 34 HV. Increasing GNP content with zinc and manganese reinforcement is important for improving hardness in sintered Mg-based GNPs composites. An immersion test on GNP-reinforced Mg composites showed that Mg0.2%Mn%6%Zn-1% GNPs had the highest corrosion resistance (PW=17.546mm/y), followed by Mg0.2%Mn%6%Zn-0.5% GNPs (PW=19.770mm/y), Mg0.2%Mn%6%Zn (PW=22.958mm/y), and HP Mg (PW=90.3146mm/y). GNPs also lowered the corrosion rate in saline solution. Corrosion morphology and type were determined by 3D optical microscope, SEM, and EDX. Overall, this study has managed to fabricate Mg-based composites using the powder metallurgy method. Adding GNP as reinforcement has increased hardness and corrosion properties significantly, thus proving the strengthening effect of corrosion resistance by GNPs in Mg-based composites. Universiti Malaysia Sarawak 2023-10 Thesis http://ir.unimas.my/id/eprint/43248/ http://ir.unimas.my/id/eprint/43248/3/Abg%20M.%20Harith_dsva.pdf text en staffonly http://ir.unimas.my/id/eprint/43248/5/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin%20-%2024%20pages.pdf text en public http://ir.unimas.my/id/eprint/43248/7/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin.ftext.pdf text en validuser masters Universiti Malaysia Sarawak Department of Mechanical Engineering
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English English English
topic	TJ Mechanical engineering and machinery TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery TJ Mechanical engineering and machinery Abang Mohamad Harith, Beniamin Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
description	Magnesium (Mg) has been used for many decades in various applications. This metal has attractive mechanical properties such as strength and hardness. Although Mg is lightweight and has high strength, one of the major limiting factors in using Mg includes its corrosion resistance. In the natural environment, the poor corrosion resistance of Mg and Mg alloys in saline and physiological environments remains a constant threat for Mg and Mg alloys as potential automotive parts, aerospace materials or biomedical implants. This research is done to study the hardness and corrosion properties of Mg and Mg-based composites. The hardness was determined using the Vickers microhardness test. Based on the results, Mg0.2%Mn%6%Zn-1% GNPs had the highest hardness at 48 HV, followed by Mg0.2%Mn%6%Zn-0.5% GNPs at 45 HV, Mg0.2%Mn%6%Zn at 44 HV, and HP Mg at 34 HV. Increasing GNP content with zinc and manganese reinforcement is important for improving hardness in sintered Mg-based GNPs composites. An immersion test on GNP-reinforced Mg composites showed that Mg0.2%Mn%6%Zn-1% GNPs had the highest corrosion resistance (PW=17.546mm/y), followed by Mg0.2%Mn%6%Zn-0.5% GNPs (PW=19.770mm/y), Mg0.2%Mn%6%Zn (PW=22.958mm/y), and HP Mg (PW=90.3146mm/y). GNPs also lowered the corrosion rate in saline solution. Corrosion morphology and type were determined by 3D optical microscope, SEM, and EDX. Overall, this study has managed to fabricate Mg-based composites using the powder metallurgy method. Adding GNP as reinforcement has increased hardness and corrosion properties significantly, thus proving the strengthening effect of corrosion resistance by GNPs in Mg-based composites.
format	Thesis
qualification_level	Master's degree
author	Abang Mohamad Harith, Beniamin
author_facet	Abang Mohamad Harith, Beniamin
author_sort	Abang Mohamad Harith, Beniamin
title	Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_short	Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_full	Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_fullStr	Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_full_unstemmed	Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite
title_sort	investigation on hardness and corrosion properties of graphene nanoplatelets reinforced magnesium composite
granting_institution	Universiti Malaysia Sarawak
granting_department	Department of Mechanical Engineering
publishDate	2023
url	http://ir.unimas.my/id/eprint/43248/3/Abg%20M.%20Harith_dsva.pdf http://ir.unimas.my/id/eprint/43248/5/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin%20-%2024%20pages.pdf http://ir.unimas.my/id/eprint/43248/7/Thesis%20MEng_Abang%20Mohamad%20Harith%20Abang%20Beniamin.ftext.pdf
_version_	1804888426489577472

Investigation on Hardness and Corrosion Properties of Graphene Nanoplatelets Reinforced Magnesium Composite

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