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Information × Registration Number 0224U002664, 0121U109642 , R & D reports Title Development of the scientific methods control processes of formation structure and properties in casting from hypereutectic Al-Si alloys popup.stage_title Head Pryhunova Adel Н., д.т.н. Registration Date 23-02-2024 Organization Physico-technological institute of metals and alloys National academy of Sciences of Ukraine popup.description2  ABSTRACT Report on the Research work: 265 pp., 27 tables, 115 figures, 4 patents, 244 sources MICROSTRUCTURE, PRIMARY SILICON CRYSTALS, IRON-CONTAINING PHASES, PHASE TRANSFORMATIONS, MECHANICAL PROPERTIES The object of research is the processes of formation of the structure and properties of supereutectic silumins, including Al - 16.5% Si, as well as piston alloys AK12M2MgN, AK18 and AK16M2MgZh under the conditions of adding different concentrations of Fe, various thermodynamic effects and modification. The purpose of the work is to determine the patterns of structure formation of supereutectic aluminum-silicon alloys with abnormal parameters of the structure and properties in the liquid state, to develop on their basis a nickel-free piston alloy with an increased iron content and technological parameters of its production. Research methods - optical and raster electron microscopy, quantitative metallography; X-ray structural, X-ray spectral, thermal, hardening and microstructural analyses; testing of mechanical and tribological properties. Modern ideas regarding the formation of the structure of supereutectic Al-Si alloys, the existing ways of improving their properties, and the tasks of the work are formulated. A study of the structure formation of supereutectic Al-Si alloys with a silicon content of 14 wt. % up to 18 wt. % under the conditions of physical and chemical effects on the liquid state. Based on the revealed regularities of structure formation, changes in the phase composition and morphology of iron-containing phases, their relationship with the characteristics of mechanical properties, the composition of a supereutectic aluminum-silicon piston alloy with an increased iron content was developed, its micro- and macrostructures, morphological features of phases and mechanical properties were investigated. The technological process of its smelting and modification has been developed. Product Description popup.authors Isaycheva Nina P. Abolikhina Olena V. Belik Valentyn I. Babiuk V.D. Borysov Аndrii H. Vernydub Anatolii H. Holovachenko Victor P. Zhydkov Yevhen A. Kotliarskyi Franko M. Koshelev Mykhaylo V. Lutsenko Nadiia P. Liashenko Tetiana V. Neduzhyi Artem M. Onoprienko Liudmyla I. Sydorchuk Lidiia M. Tsir Taras H. Сhaplyhina Liudmyla S. Sheiham Valerii Yu. Shenevidko Leonid K. popup.nrat_date 2024-02-23 Close