2009
Abstract: The study deals with the TEM characterization of samples after low-cycle fatigue (LCF) tests of austenitic stainless steels used in nuclear power plants (NPP). Microcracks are observed in the TEM thin films prepared from standard cylindrical bulk samples. In plastic zones, at the tips of microcracks, several three-dimensional crystal structure defects are detected: 1. Arched extinction contours, 2. Zone of disorientations, 3. Deformation twins of different orientations, 4. Short micro cracks deviated from the…
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