RESEARCH ON THE ROLE OF STRAIN RATE AND TEMPERATURE IN FATIGUE

Abstract

This study is concerned with the roles of strain rate and temperature on fatigue behavior. For the purposes of the immediate work pure aluminum and an aluminum - 10 percent zinc alloy were selected. To simplify analyses of the observed behavior, an axial fatigue machine was designed to eliminate strain rate and stress gradients in the specimen cross-section. Strain rates of 5 and 150 percent per minute, strains of + or - 1 percent, and temperatures from 80 to 900 F were the variables studied. A number of grain sizes were utilized to evaluate the role of alloy structure. Other strain rates, strains and structures, including two phase systems, are being examined to extend the studies. Thermal fatigue behavior will be examined and the results compared with the present observations in mechanical fatigue.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1967
Accession Number
AD0813619

Entities

People

  • Donald L. Ritter
  • Joseph T. Blucher
  • Nicholas J. Grant

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Alloys
  • Aluminum
  • Boundaries
  • Contrast
  • Electrons
  • Grain Size
  • High Temperature
  • Low Temperature
  • Materials
  • Materials Laboratories
  • Mechanics
  • Metals
  • Reduction Of Area
  • Solid Solutions
  • Tensile Strength
  • Thermal Fatigue

Readers

  • Materials Science and Engineering.
  • Mathematics or Statistics
  • Systems Analysis and Design