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Information × Registration Number 0223U002880, (0120U103209) , R & D reports Title Development of fundamental bases obtaining aluminium matrix composites reinforced with nanoquasicrystals for operation at elevated temperatures and studying the processes of their contact elastic-plastic deformation popup.stage_title Дослідження структури та фазового складу алюмоматричних композитів, зміцнених наноквазікристалами. Узагальнення експериментальних даних та визначення фізичної природи підвищення пластичності і міцності отриманих композитів. Head Yefimov Mykola O., Кандидат фізико-математичних наук Registration Date 15-03-2023 Organization Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine popup.description1 Development of fundamental principles of creation of composite materials on the basis of aluminum alloys with the use of nanoquasicrystalline reinforcing particles, studying of their physical bases of strength. popup.description2  The object of research is composite materials on Al-Fe-Cr alloys based, which contain quasicrystalline and crystalline phases and obtained by water-atomization technique. The purpose of the research is develop the fundamental principles of obtaining and studying the deformation processes of aluminum alloys for elevated temperatures application. Research methods - microhardness measurements, mechanical tensile tests, tribological tests, scanning and transmission electron microscopy, X-ray diffraction analysis. The composite alloy Al94Fe2Cr2Ti2, in which the aluminum matrix reinforced with nanosized quasicrystalline and crystalline intermetallic particles, has the highest strength among wrought aluminum alloys at elevated temperatures up to 300 oC (UTS ≥ 387 MPa). For the first time, it is shown the possibility characterization the wear of a material by changing of ductility to fracture in tensile tests. It is established that the strength of aluminum matrix composites based on Al-Fe-Cr system is provided by high hardness and high Young's modulus of quasicrystals or crystalline intermetallics, as well as their stability to relatively high temperatures. The sufficient plasticity of Al-Fe-Cr alloys is provided by special deformation mechanism that leads to stress relaxation and provides high plasticity at the level of 7%. Product Description popup.authors Yefimov Mykola O. Holubenko Oleksii A. Honcharova Iryna V. Honcharuk Viktor A. Hrinkevych Kostiantyn E. Zakharova Nataliia P. Zakharova Nataliia P. Lukianov Oleksandr I. Milman Yulii V. Tkachenko Ivan V. Chuhunova Svitlana I. popup.nrat_date 2023-03-15 Close