TREATMENT OF ALUMINUM ALLOYS SURFACE BY NANOSECOND LASER

Mohamed Ezzat, M. A. El-Waily, M. Abdel-Rahman and Yehea Ismail
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Mohamed Ezzat: Center of Nanoelectronics and Devices (CND), Zewail City of Science and Technology/American, University in Cairo, Cairo, Egypt†Laser Institute for Research and Application (LIRA), Beni Suef University, Egypt
M. A. El-Waily: #x2021;Physics Department, Faculty of Engineering, German University in Cairo, Cairo, Egypt
M. Abdel-Rahman: #xA7;Physics Department, Faculty of Science, Minia University, Minia, Egypt
Yehea Ismail: Center of Nanoelectronics and Devices (CND), Zewail City of Science and Technology/American, University in Cairo, Cairo, Egypt

Surface Review and Letters (SRL), 2018, vol. 25, issue 04, 1-7

Abstract: Aluminum and its alloys are widely used in our daily life because of their desirable physical properties. Improving the quality of Al-alloys surface layers is required for industrial applications. Nd: YAG pulsed Nanosecond Laser was used in irradiating aluminum 1100 alloy to study the surface morphology and hardness properties. Scanning Electron Microscope (SEM) images reveal the presence of small holes with different diameters that are produced by the irradiation of Aluminum alloy surfaces with different laser power densities. The diameters of the produced holes are decreased gradually by increasing the laser power density. Minimum diameter of about 1.84μm is obtained after irradiating the aluminum surface with 1256.04MW/cm2 at which semi-periodic holes-like pattern were produced. An increase in the Vickers microhardness values was obtained until the maximum value of 28 HV was reached at laser power density of 750.16MW/cm2. After reaching the maximum value, a fast decrease in the microhardness values was observed. Such changes in microhardness values maybe attributed to the lattice disorder and the change in the defect density produced by laser irradiation.

Keywords: Al-alloy; laser irradiation; SEM; Vickers microhardness (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1142/S0218625X18500798

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