Journal Published Online: 01 May 1983
Volume 11, Issue 3

Fractographic Examination in the Scanning Electron Microscope as a Tool in Evaluating Through-Thickness Tension Test Results



The through-thickness tension test is used to assess resistance to lamellar tearing. Observed through-thickness reduction-of-area (TTRA) values are usually well above the 20% minimum specification level in steels produced for lamellar-tearing-resistant applications. Low TTRA values, when encountered, indicate susceptibility to lamellar tearing but provide little indication of the source of premature fracture. Fractographic examination, especially with the scanning electron microscope, provides information about the origins of low ductility. Sources of premature fracture discussed herein are indigenous inclusions, exogenous inclusions, occluded hydrogen, undissolved alloy additions, and solidification microvoids.

Author Information

McDonald, MM
Research Laboratory, United States Steel Corp., Monroeville, PA
Ludwigson, DC
Research Laboratory, United States Steel Corp., Monroeville, PA
Pages: 9
Price: $25.00
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Stock #: JTE10677J
ISSN: 0090-3973
DOI: 10.1520/JTE10677J