Surface characteristics of aluminum 6061-T6 subjected to Nd:YAG pulsed-laser irradiation

Sungho Choi, Chung Seok Kim, Kyung Young Jhang, Wan Soon Shin

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2163-2166
Number of pages4
JournalJournal of Mechanical Science and Technology
Volume26
Issue number7
DOIs
StatePublished - Jul 2012

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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