Abstract
By employing a pulsed laser source to produce microcracks, typical features of brittle fracture of nanocrystalline FeMoSiB ribbon have been investigated. From the energy viewpoint, explanation for the branching behavior of a moving crack front was proposed. Static and dynamic fracture toughness of the material were calculated to be on average 3.3 and 15.2 MPa m 0.5, respectively, and the difference between these two values was elucidated in comparison with experimental results in the literature.
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