PSI - Issue 59

Olexandr Ivanov et al. / Procedia Structural Integrity 59 (2024) 330–336 Olexandr Ivanov et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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According to the image resolution, the polishing depth converted into micrometers, is Δh=5.686 microns. The next step consists of repeating polishing of the sample with same polishing depth, until the fixation in the structure the particle, taking images along during the procedure and continuing procedure until the moment where there are no traces of presence of the grain under observation area. Based on taken images next step was modeling of 3D model of the particle. Using the Blender software images were placed in reverse order, with a step between them as 18.424 pxl to preserve the ratio between the image dimension and the distance between them. After that, the contours of the particle were outlined using the built-in tools of the Blender software. The contours between the images were connected to obtain a 3D model of the particle. 3. Results and discussion Medium hardness of the hardfacing, based on at least three measures, is 64 HRC. As can be seen on the Fig. 3 material structure consist of polygonal-shaped Fe(Mo, B) 2 grains inside of main matrix material. Inside of Fe(Mo, B) 2 grains small round-shaped grains can be spotted, which are TiC.

Fig. 3. Microstructure of the hardfaced layer.

For the modeling of 3D-model of the particle 23 images of structure were taken (Fig. 4). The contours between the images were connected for obtaining the 3D model that represents the external and internal geometry of the particle. As a result, a particle consisting of 23 sections was modeled (Fig. 5). Both geometry and relief are preserved, the particle can be rotated arbitrarily in relation to three axes, and there are possibilities of the software that allows to export the model in the formats convenient for integration into other software. The image confirms that inside of Fe(Mo, B) 2 grain there are three grains of TiC placed almost at center of grain. The advantages of such method of obtaining the 3D model is the model based on actual parameters of the grain and it could be used for any structure of any solid material. Experiment in this research was conducted with “polishing step” of 5.686 microns. The result model, its geometry and relief, can be done more precisely with lowering the amount of material that is removed with polishing. Similar models obtained with such algorithm also can be used for comparison of experimental and theoretical/virtual data as well as for calculation of measurement error of computer modeling for material structure.