Atomatic X-Ray Diffraction Machine Measurement of Residual Stress in Aluminum Alloys

Abstract

Fastress automatic x-ray diffraction machine measurement of stress in aluminum alloys is compared with stress determined by strain gage and conventional x-ray diffraction techniques. Modification of the Fastress specimen positioner and operating procedures were required for acceptable performance. The modified machine and procedures resulted in measurement of stress in 2024-T6 aluminum alloy with a maximum error of 3,400 psi and a mean error of 2,600 psi compared to the strain gage measurements. Fastress values agreed within 1,000 psi of residual stresses determined by conventional x-ray diffraction methods. Test of a shot-peened 2024-T6 aluminum alloy resulted in a maximum error of 4, 600 psi and a mean error of 2,000 psi compared to a strain-gage-determined stress.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1975
Accession Number
ADA019495

Entities

People

  • Donald H. Gray

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Aircrafts
  • Aluminum Alloys
  • Data Analysis
  • Detectors
  • Engineering
  • Engineers
  • Materials
  • Materials Laboratories
  • Measurement
  • Mechanical Engineering
  • Mechanical Equipment
  • Residual Stress
  • Strain Gages
  • X Rays
  • X-Ray Diffraction

Readers

  • Aerospace Test and Evaluation
  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.