13th International Conference on Fracture June 16–21, 2013, Beijing, China -6- Figure 6. Stress amplitude a(a), change in tofmean (b) and change in peakmean (c) vs. number of cycles N at T = 300 °C 3.3. In-situ monitoring of fatigue damage by means of cross effects between mechanical and EMAT data Besides the conventional characterization of the cyclic deformation behavior using stress-strain-hysteresis measurements, far-reaching cross effects of physically based data from electromagnetically activated ultrasonic measurements and mechanical strain measurements can be used for in-situ monitoring of fatigue processes. Figure 7 shows stress-strain-hysteresis at defined
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