Classification of Corrosion Defects in NiAl Bronze Through Image Analysis

Abstract

Corrosion surface damage in the form of pitting and micro-cracks is observed in many metals. Cracks usually initiate from the pits and grow under cyclic stresses and eventually lead to material failure. An image analysis based on wavelet transforms and fractals was used to study the corrosion morphology of nickel aluminum bronze metal under varying corrosion conditions and applied stresses. Image feature parameters were extracted and analyzed to classify the pits/cracks in the metal samples. The results obtained indicate that classification of pits/cracks is possible with image analysis and may be used for correlating service/failure conditions based on corrosion morphology.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2010
Accession Number
ADA527719

Entities

People

  • A. S. Rao
  • Angela Whitfield
  • Babak S. Aghazadeh
  • Gerald P. Mercier
  • Ramana M. Pidaparti

Organizations

  • Naval Surface Warfare Center Carderock Division

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aluminum
  • Aluminum Alloys
  • Classification
  • Corrosion
  • Digital Image Processing
  • Digital Images
  • Electron Microscopy
  • Engineering
  • Image Processing
  • Materials
  • Mechanics
  • Metals
  • Microscopy
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Two Dimensional
  • Wavelet Transforms

Fields of Study

  • Materials science

Readers

  • Image Processing and Computer Vision.
  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.