Effect of applied load and the sliding speed on the subsurface deformation of wear on hybrid metal matrix composite

Ahmad Mawardi, Adilla Fasha (2017) Effect of applied load and the sliding speed on the subsurface deformation of wear on hybrid metal matrix composite. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

A recent study has focused on the surface and subsurface of a material that is subjected to wear. Subsurface deformation played an important role in wear mechanism which can cause considerable change in the microstructure of the material. These changes can lead to the change in material properties. Subsurface deformation of pure magnesium was tested while incorporating with 10 wt.% micro-sized silicon carbide (SiC) particles and 1 wt.% carbon nanotubes under four applied loads (5, 10, 20 and 40N) with two sliding speeds (0.5 and 1.5m/s). Microhardness testing was carried out to analyze the effect of different applied loads and the sliding speeds on the subsurface of a worn surface. It can be observed that the presence of hard reinforcements in a matrix increases the hardness of a material. As the addition, the extent of the subsurface deformation was also measured and the characterization of a worn surface was analyzed by using the optical microscope (OM) and scanning electron microscope (SEM). The extent of the deformation and banded structure in pure magnesium can be measured and seen clearly. This banded structure becomes larger as increasing in applied loads and sliding speed. Meanwhile, when silicon carbide (SiC) and carbon nanotube (CNT) were added, the banded structure was almost absent for each load and sliding speed. The finding of this study hope will lead to the benefits and aid the future researches as their guide for better understanding.

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