Eddy Current Test for Bolts

Abstract

The signal strength and the phase angle of the eddy current indication is a function of metal integrity, stand off yield strength, hardness, grain structure, and electrical conductivity. This concept was used to differentiate between grade 5,8, and 8.2 bolts. The statistical analysis of the data obtained from this study shows a high degree of correlation between bolt grade and eddy current indications. Tests were also conducted to detect 5% surface cracks of various orientation and locations using the same eddy current setup. It is concluded that eddy current technique can be used as a reliable inspection method to detect cracks and to differentiate between different grades of bolts.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1989
Accession Number
ADA214829

Entities

People

  • Robert Maiello
  • Syed Ali

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Advanced Electronics
  • Human Systems
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Conductivity
  • Data Science
  • Department Of Defense
  • Detectors
  • Eddy Currents
  • Electrical Conductivity
  • Engineering
  • Frequency
  • Hardness
  • Information Science
  • Inspection
  • Measurement
  • Military Research
  • Orientation (Direction)
  • Standards
  • Statistical Analysis

Readers

  • Structural Health Monitoring of Composite Structures.
  • Systems Analysis and Design