Rapid determination of the fracture toughness of metallic materials using circumferentially notched bars |
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Authors: | Ali Bayram Agah Uguz Ali Durmus |
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Affiliation: | (1) Faculty of Engineering and Architecture, Gorukle, Uldag University, 16059 Bursa, Turkey |
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Abstract: | 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. |
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Keywords: | Al-Si-cast alloys Al-Zn-Mg-Cu-wrought alloy dual-phase steel fracture toughness |
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