Rapid determination of the fracture toughness of metallic materials using circumferentially notched bars

Bayram A., Uguz A. , Durmus A.

Journal of Materials Engineering and Performance, vol.11, no.5, pp.571-576, 2002 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 5
  • Publication Date: 2002
  • Doi Number: 10.1361/105994902770343836
  • Title of Journal : Journal of Materials Engineering and Performance
  • Page Numbers: pp.571-576


Three types of material whose fracture toughness tests were previously performed by using circumferentially notched bars, namely (1) a dual-phase steel with three different morphologies; (2) an Al-Zn-Mg-Cu-wrought alloy; and (3) Al-Si-cast alloys with three different Si contents, were investigated in terms of accuracy and reliability of the testing method. Also, the advantages of using circumferentially notched bars for fracture toughness determination of metallic materials were discussed. With the help of stress concentration factors, which are associated with the bluntness of the notch, correction factors for the fracture toughness calculations are derived. The corrected fracture toughness values are found to be close to the uncorrected ones, implying that the testing procedure is reliable.