Comparisons of K sub I c Measurements by the Short Rod and ASTM E 399 Methods.

Abstract

A multilaboratory blind comparison testing program was used to evaluate the accuracy of the short rod method of measuring the fracture toughness of metallic materials. Valid comparisons between K(Ic's) measured according to ASTM E 399 and by the short rod method were obtained for several steels, aluminum alloys, and titanium. The short rod K(Ic) values were consistently low, averaging 6 percent below the measurements according to E 399. A 4 percent adjustment in the short rod calibration constant, which had been previously evaluated only to + or - 7 percent, brings the two sets of K(Ic) measurements into very good agreement. The short rod method thus appears to be a viable alternative for measuring the fracture toughness of metallic materials. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1979
Accession Number
ADA071398

Entities

People

  • Francis I. Baratta
  • Lynn M. Barker

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Engineering
  • Fracture (Mechanics)
  • Libraries
  • Materials
  • Materials Laboratories
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Military Research
  • New York
  • Standards
  • Test Methods
  • Toughness

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  • Materials Science (Mechanical Engineering).
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