Laser Induced Reaction for Pre-Bond Surface Preparation of Aluminum Alloys

Abstract

Irradiation of Al alloy 2024/T3 with excimer laser was carried out at various experimental conditions (laser energy and number of pulses). Surface analysis of the treated alloy was carried out by FTIR, SEM and AUGER. The laser treated metal adherends were bonded with rubber modified epoxy adhesive, and the resultant shear strength (SLS) was measured. Fracture surfaces were analysed by SEM. The results show clearly that laser prebond treatment of the neat adherend's surface improved significantly the adhesion strength. Improvement of 600% of the adhesion shear strength was achieved with laser energy of about 0.2 J/P/cm2, compared to the adhesion strength of untreated neat Al alloy. The value of the adhesion strength after optimal laser treatment even exceeds that of conventional unsealed chromic anodized treatment.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1992
Accession Number
ADA249916

Entities

People

  • A. Buchman
  • H. Dodiuk
  • J. Zahavi
  • M. Rotel

Tags

DTIC Thesaurus Topics

  • Adhesion
  • Adhesives
  • Air Force
  • Chemistry
  • Chromic Acid
  • Chromium Compounds
  • Excimer Lasers
  • Failure Mode And Effect Analysis
  • Laser Pulses
  • Lasers
  • Materials
  • Mechanical Properties
  • Shear Strength
  • Surface Analysis
  • Surface Finishing
  • Surfaces
  • Ultraviolet Lasers

Fields of Study

  • Materials science

Readers

  • Optical Physics and Photonics.
  • Surface Coatings Technology.

Technology Areas

  • Directed Energy