title: ÐÑÑÐ²Ð»ÐµÐ½Ð¸Ðµ Ð³ÑÐ°Ð½Ð¸Ñ Ð±ÑÐ²ÑÐµÐ³Ð¾ Ð°ÑÑÑÐµÐ½Ð¸ÑÐ½Ð¾Ð³Ð¾ Ð·ÐµÑÐ½Ð° Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° ÑÐ°Ð·Ð¾ÑÐ¸ÐµÐ½ÑÐ¸ÑÐ¾Ð²Ð¾Ðº Ð½Ð° Ð³ÑÐ°Ð½Ð¸ÑÐ°Ñ ÐºÑÐ¸ÑÑÐ°Ð»Ð»Ð¸ÑÐ¾Ð² Ð² ÑÑÐ°Ð»ÑÑ Ð¼Ð°ÑÑÐµÐ½ÑÐ¸ÑÐ½Ð¾-Ð±ÐµÐ¹Ð½Ð¸ÑÐ½Ð¾Ð³Ð¾ ÐºÐ»Ð°ÑÑÐ°
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Identification of the boundaries of the prior austenite grain based on the analysis of misorientations at the boundaries of crystallites in steels of the martensitic-bainitic class
Creators: name: ÐÐ¾ÑÐ¾Ð²ÑÐºÐ°Ñ, ÐÐ»ÑÐ³Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: ÐÑÑÑÐµÐ½Ð¸Ñ
Ð¡ÑÐ°Ð»Ñ ÑÐ³Ð»ÐµÑÐ¾Ð´Ð¸ÑÑÐ°Ñ
Ð¿ÐµÑÐ²Ð¸ÑÐ½Ð¾Ðµ Ð·ÐµÑÐ½Ð¾
prior grain

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description: The theme of the final qualification work: "Identification of the boundaries of the prior austenite grain based on the analysis of misorientations at the boundaries of crystallites in steels of the martensitic-bainitic class". This work is devoted to testing the effectiveness of identifying the boundaries of the prior austenite grains in martensitic and bainite type steels using EBSD analysis and comparing the results with data obtained by vacuum etching. During the study, the following tasks were solved: 1. The study of the boundaries of prior austenite grains by EBSD-analysis based on the crystallographic relationship during Î³âÎ±-transformation in steel samples. 2. Processing of the obtained EBSD data for samples of high-strength steels of the martensitic-bainitic class using the MTEX ââMatlab package. 3. Revealing the boundaries of prior austenite grains of high-strength steel samples after thermal etching in vacuum. 4. Comparison of the data obtained using the EBSD method with the data obtained as a result of thermal etching in vacuum of samples of high-strength steels of the martensitic-bainitic class. The work was carried out on the basis of the NRC "Kurchatov Institute" - CRISM "Prometey". Comparison of the results of applying the EBSD method and the method of thermal etching in vacuum showed that both methods are effective in identifying the boundaries of the primary austenite grain in martensitic steels. In steels of the bainitic class, using the EBSD method, a smaller proportion of boundaries was revealed than in steels of the martensitic class. The boundaries of the prior austenite grain, revealed by thermal etching in vacuum, in samples of steel of the bainitic class do not coincide with the boundaries revealed by the EBSD method. It was found that in the steel of the bainitic class, the transformation occurred according to the diffusion-shear mechanism, which made it difficult to identify the boundaries of the primary austenite grain based on the orientation relation during the Î³ â Î±-transformation.