MORPHOLOGICAL ANALYSIS OF NI-CR ALLOYS TREATED VIA CO2 LASER
Nickel-Chromium (Ni-Cr) is a highly used in the engineering field as heating elements in machineries due to its property of being able to resist oxidation, high temperature corrosion and wear. Nevertheless, Ni-Cr tends to lose its initial ductility and hardness if extreme pressure, temperature...
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| Main Author: | |
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| Format: | Final Year Project Report |
| Language: | English English |
| Published: |
Universiti Malaysia Sarawak
2022
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/39368/1/FYP_Giovanni%20Lusom%20anak%20Andrew%20-%20%2024pages.pdf http://ir.unimas.my/id/eprint/39368/4/Giovanni%20Lusom.pdf http://ir.unimas.my/id/eprint/39368/ |
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| Summary: | Nickel-Chromium (Ni-Cr) is a highly used in the engineering field as heating elements in
machineries due to its property of being able to resist oxidation, high temperature
corrosion and wear. Nevertheless, Ni-Cr tends to lose its initial ductility and hardness if
extreme pressure, temperature and external force are being applied to it for a long period
of time due to the alterations in the molecular arrangment of the alloy. Hence, this
experiment aims to tackle the problem related to decrement in the performance of Ni-Cr
by treating the surface of Ni-Cr composite via employing low-power Carbon Dioxide,
CO2 laser. The objectives of this research are to prepare Ni-Cr pellets via cold compaction
pelletizing device, to vary the parameters onto Ni-Cr alloy pellets and to analyze the
surface morphology and tensile strength of the laser-treated Ni-Cr alloys via Scanning
Electron Microscopy (SEM), Energy Dispersive X-Ray (EDX), X-Ray Diffraction
(XRD), Porosity Test and Vickers Hardness Test. The initial step in the experiment
methodology is material preparation. This is followed by pelletizing, sintering and laser
surface treatment. Once the pellets are done the analyses are done on the composites. This
research proves that low power CO2 laser can be considered as a way to treat Ni-Cr alloys
due to the changes in the structures of the pellets and the physical properties. |
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