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SEM-EDX Analysis of Laser Surface Alloying on Aluminum
Noriah Bidin1, Mundzir Abdullah1, Mohd Syafik Shaharin1, Yusef Abdul Alwafi1, Dwi Gustiono Riban2 & Moh Yasin1,3
1Advanced Photonic Science Institute, Faculty of Science,
University Teknologi Malaysia, Skudai 81300, Malaysia
2Ibnu Sina Institute for Fundamental Science Studies,
Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia
3Department of Physics, Faculty of Science and Technology,
Airlangga University, Jalan Mulyorejo, Surabaya 60115, Indonesia
Email: noriah@utm.my
Abstract. Microstructure and chemical composition changes on the alloyed aluminum surface were investigated using SEM-EDX analysis. A Q-switched Nd:YAg laser was focused to induce breakdown and plasma formation. The high plasma temperature and the shock wave pressure were responsible for speeding up the laser surface alloying process. The rapid heat and cooling process introduced a non-equilibrium condition causing changes in the microstructure as well as the chemical composition of the alloyed aluminum surface. The remelted layer and molten pools were realized after the aluminum received a power density greater than 5 x 108 Wcm-2. The chemical composition change confirms that the convection process had taken place during the alloying process.
Keywords: chemical composition; Fe-Cu powder; intermetallics phase; laser alloying; microstructure.
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