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
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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
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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.
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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
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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.
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2023-03-15
