Nondestructive Test Technique Development Based on the Quantitative Prediction of Bond Adhesive Strength

Abstract

Results of a Surface Condition Study on 6061-T6 aluminum alloy butt tensile, core shear, and single lap shear specimens of various roughnesses, bonded with an Epon 828/DETA formulation, have supported the creation of a practical equation for predicting bond adhesive strength (Zurbrick). Major controlling variables, i.e. substrate surface free energy, contact angle, and bondline thickness, are all potentially measurable nondestructively. A strong correlation between white light specular reflection values and values of aluminum substrate surface free energy calculated from experimental data was obtained, encouraging extensive investigation of this NDT technique. Exo- electron emission, ultrasonic gas-phase transmission, and electric field reflectometry techniques were also evaluated in continuing feasibility studies.

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Document Details

Document Type
Technical Report
Publication Date
Jul 20, 1970
Accession Number
AD0717663

Entities

People

  • John R. Zurbrick

Tags

DTIC Thesaurus Topics

  • Chemical Reactions
  • Chemistry
  • Diffraction
  • Electric Fields
  • Electromagnetic Radiation
  • Electron Emission
  • Electrons
  • Energy
  • Energy Storage
  • Energy Transfer
  • Finishes
  • Measurement
  • Standing Waves
  • Surface Properties
  • Surface Roughness
  • Test And Evaluation
  • Test Equipment

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene