A new test method suitable for the dynamic fracture toughness evaluation of irradiated specimens has been developed. The method is based on the application of the new pendulum type impact tester equipped with a self-adjusting IR-laser extensometer and fully computerized data acquisition and processing. The testing system contains several unique features, which make the impact testing more appropriate from the fracture mechanics point of view. These features include, for example, the inversion of the test geometry to reduce inertia and specimen oscillation effects, the utilization of larger than normal Charpy-size specimens, and the application of the IR-extensometer to evaluate ductile fracture initiation enabling the determination of the energy-based fracture toughness parameters. In this paper the testing procedure will be described and its application on the characterization of the unirradiated and irradiated IAEA phase III correlation monitor material for surveillance programmes will be presented.
|Pages (from-to)||89 - 106|
|Number of pages||18|
|Journal||International Journal of Pressure Vessels and Piping|
|Publication status||Published - 1993|
|MoE publication type||A1 Journal article-refereed|