Journal Published Online: 01 November 1976
Volume 4, Issue 6

Monitoring Crack Extension in Fracture Toughness Tests by Ultrasonics

CODEN: JTEVAB

Abstract

An ultrasonic method was used to observe the onset of crack extension and to monitor continued crack growth in fracture toughness specimens during three-point bend tests. A 20-MHz transducer was used with commercially available equipment to detect average crack extension less than 0.09 mm. The material tested was a 300-grade maraging steel in the annealed condition. A crack extension resistance curve was developed to demonstrate the usefulness of the ultrasonic method for minimizing the number of tests required to generate such curves.

Author Information

Klima, SJ
National Aeronautics and Space Administration Lewis Research Center, Cleveland, Ohio
Fisher, DM
National Aeronautics and Space Administration Lewis Research Center, Cleveland, Ohio
Buzzard, RJ
National Aeronautics and Space Administration Lewis Research Center, Cleveland, Ohio
Pages: 8
Price: $25.00
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Details
Stock #: JTE11370J
ISSN: 0090-3973
DOI: 10.1520/JTE11370J