Journal
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
Volume 26, Issue 7, Pages 2163-2166Publisher
KOREAN SOC MECHANICAL ENGINEERS
DOI: 10.1007/s12206-012-0537-x
Keywords
Pulsed-laser; Diameter of the melted zone; Average surface roughness; Absorbance
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Funding
- National Research Foundation of Korea [핵C6A1202] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The objective of this study was to investigate the surface characteristics of an aluminum 6061-T6 alloy subjected to Nd:YAG pulsed-laser irradiation. The test specimens were prepared by a mechanical polishing process using diamond paste and emery polishing paper to obtain different levels of initial surface roughness. After ten pulsed-laser shots, the surface morphology was observed via optical microscopy (OM) and scanning electron microscopy (SEM). Nano-indentation hardness testing was also conducted on the irradiated surface. The diameter of the melted zone increased with surface roughness because of the multiple reflection and absorption of the laser beam. The relative absorbance was measured as a function of the diameter of the melted zone with varied surface roughness.
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