Nondestructive Evaluation of Metal Matrix Composites.

Abstract

The objective of the program was to apply nondestructive evaluation (NDE) methods to assess the integrity of FP/magnesium composites. The material investigated was ZE41A magnesium alloy reinforced with FP (aluminum oxide) fibers. The 21 specimens were evaluated using ultrasonic scanning, wave propagation velocity, wave attenuation, and X-ray radiograph inspection techniques. After the NDE inspections were completed, a representative specimen from each of the seven groups was sectioned and micrographs were made for comparison with the NDE records. It was found that ultrasonic scanning using a 15 MHz compression wave, focused transducer operated in the pulse-echo mode generating an analog C-scan gave the best results. The wave attenuation and wave propagation velocity measurements were found to be very consistent with the ultrasonic C-scans, but X-ray radiography was useful only at locations of gross material defect. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1982
Accession Number
ADA119996

Entities

People

  • I. M. Daniel
  • Scott W. Schramm

Organizations

  • IIT Research Institute

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Waves
  • Aluminum Oxides
  • Backscattering
  • Composite Materials
  • Compression Waves
  • Delamination
  • Detection
  • Laminates
  • Materials
  • Materials Science
  • Measurement
  • Mechanics
  • Metal Matrix Composites
  • Recording Systems
  • Ultrasounds
  • Wave Propagation
  • Waveforms

Fields of Study

  • Physics

Readers

  • Structural Health Monitoring of Composite Structures.