Keywords
materials science
titanium alloys
ultrafine grain structure
microhardness
technological education
professional education
How to Cite
Abstract
The article provides a theoretical and methodological justification of the experiment as an effective didactic means of forming knowledge in materials science in the system of technological and vocational education. The essence of the experimental method as an integrative form of organizing educational activity, combining cognitive, practical and research components, is revealed. Its main functions in the educational process are determined, in particular cognitive, developmental, motivational and applied, and the methodological features of implementation in the conditions of competency-based learning are outlined. Particular attention is paid to the possibilities of integrating the educational experiment with elements of modern scientific research in the field of materials science. The didactic potential of this approach is revealed on the specific example of experimental production of titanium alloys with an ultrafine-grained structure by intensive plastic deformation and subsequent study of their mechanical properties by microhardness measurement. The technological features of the formation of an ultrafine-grained structure are described, the influence of the degree of deformation on the change in the microstructure of the material and the corresponding changes in mechanical characteristics. The results of the experimental study are analyzed, which indicate an increase in the hardness of titanium samples at the initial stages of deformation due to an increase in the density of dislocations and grain crushing, as well as its further decrease with an increase in the number of pressing cycles, which is associated with the processes of recrystallization and structural reorganization of the material. It is substantiated that the inclusion of such studies in the educational process contributes to the formation of a holistic idea of the relationship between the structure of the material and its properties in students.
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Sauvage, X. et al. (2012). Microstructure and mechanical behaviour of nanostructured materials. Materials Science and Engineering: A, 540, 1-12 (in English).
Toth, L. S., & Gu, C. (2014) Producing bulk ultrafine-grained materials by severe plastic deformation. Materials Characterization, (92), 1-14. https://link.springer.com/article/10.1007/s11837-006-0213-7 (in English).
Valiev, R. Z. et al. (2016). Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later. Journal metrics, (68), 1216-1226. https://doi.org/10.1007/s11837-016-1820-6 (in English).
Valiev, R. Z., & Langdon, T. G. (2006). Principles of equal-channel angular pressing as a processing tool for grain refinement. Progress in Materials Science, 51 (7), 881-981. https://doi.org/10.1016/j.pmatsci.2006.02.003 (in English).
Valiev, R. Z., Usmanov, E. I., & Rezyapova, L. R. (2022). The Superstrength of Nanostructured Metallic Materials. Physics of Metals and Metallography, 123, 1272-1278. https://doi.org/10.1134/S0031918X22601627 (in English).
Yali, Hu, Tingbin, Li, Yishuo, Liu (2025). Research on Teaching Reform of Basic Experiment Course of Material Science. Curriculum and Teaching Methodology, 8 (5), 117-122. https://doi.org/10.23977/curtm.2025.080516 (in English).
Zavalevskyi, Y. et al. (2023). Project based STEM activities as an effective educational technology in the context of blended learning. Amazonia Investiga, 12 (67), 152-161. https://doi.org/10.34069/AI/2023.67.07.14 (in English).
Zherebtsov, S., Salishchev, G., Galeyev, R., & Maekawa, K. (2005). Mechanical properties of Ti-6Al-4V titanium alloy with submicrocrystalline structure. Materials Transactions, (46), 2020-2025. https://doi.org/10.2320/matertrans.46.2020 (in English).
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