@article{ATEŞ_2023, place={Kyiv, Ukraine}, title={Determination of the KIC Fracture Toughness of the X210Cr12 High-Strength Material}, volume={7}, url={https://journal.mmi.kpi.ua/article/view/282705}, DOI={10.20535/2521-1943.2023.7.2.282705}, abstractNote={<p><em><strong>Purpose:</strong> It is an important problem that the machines become unusable due to the deformation of the machine elements produced before the planned time. In this study, it was aimed to determine the K<sub>IC</sub> value of X210Cr12, which is a high strength material. In this way, more accurate load values can be used in the design.<br /><strong>Methods:</strong> In the experimental study to determine the K<sub>IC</sub> value, the sample geometry, the crack depth, the load-dependent parameters and calculations and some conformity checks were carried out. Experimental system; K<sub>IC</sub> consists of 3-point flexure specimens, a press, an electronic circuit capable of detecting the change in load crack opening, and a logger.<br /><strong>Findings:</strong> In the study, the loads were determined from experimental graphs. Subsequently, load-crack opening values were determined. With these data, the K<sub>IC</sub> values were calculated as 719,7 and 839,7 MPa.mm<sup>1/2</sup> as the minumum and maximum values, respectively.<br /><strong>Conclusion:</strong> The experimental graphs are in the form of curves that break abruptly with unstable crack propagation without showing plastic deformation. There is no study in the literature on the K<sub>IC</sub> value of X210Cr12 and it has been determined that it has a low K<sub>IC</sub> value compared to the high-strength steels studied. It is valuable to determine the K<sub>IC</sub> value, as fracture problems may occur in designs prepared with the material. The results of the study are data at room temperature. </em></p>}, number={2 (98)}, journal={Mechanics and Advanced Technologies}, author={ATEŞ, Ergun}, year={2023}, month={Oct.}, pages={193–199} }