Registration Number
0223U000084,
0120U100217
, R & D reports
Title
Temperature dependence and structural sensitivity of mechanical properties and service characteristics on titanium and iron intermetallics and eutectic based alloys, which demonstrated strain induce transformation
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Head
Podrezov Yurii M., Доктор фізико-математичних наук
Registration Date
03-01-2023
Organization
Institute of Problems of Materials Science named after IM Frantsevich of the National Academy of Sciences of Ukraine
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A low-alloy Ti92.5Nb5Mo2.5 alloy for medical purposes was studied. It was established that the alloy combines high strength and plasticity with unique superelastic properties. The modulus of elasticity in the hardened state is E = 51 GPa, after plastic deformation it decreases by 2% to 44 GPa. It is shown that the sign and direction of load application and the test temperature have little influence on the parameters of superelasticity. The effect of plastic deformation on superelastic behavior in the initial part of the hardening curve is explained by the contribution of irreversible twinning to structure formation.
The effect of manganese doping and test temperature on the formation of the martensitic phase during tribotechnical tests was analyzed. It is shown that manganese enhances the TRIP effect but worsens the resistance to destruction. Because of this, cast iron with a high Mn content is advisable to use in products subject to wear and tear without extreme loads. Tribological and durometric studies have shown that with an increase in the working temperature, the wear resistance decreases due to a decrease in the tendency to martensitic transformation.
An express method of testing the initial areas of creep has been developed and worked out. The influence of the chemical composition and structure of eutectic and intermetallic alloys of iron and titanium on the mechanisms of high-temperature hardening and determination of temperature and speed parameters of creep was studied. A computer program has been created that allows you to predict the structural, temperature, and speed sensitivities of the ultimate mechanical characteristics in the temperature range of the brittle-plastic transition. It is shown that the anomalous sensitivity of the visco-brittle transition to the rate of deformation is related to the acceleration of the movement of dislocations.
Product Description
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Yevych Yan I.
Ivanova Inna I.
Askerov Mukafat G.
Borisovskaya Catherine Mikhailovna
Verbilo Dmitro G
Danilenko Vitaliy І.
Koryak Oksana S.
Kryzhanovska Tamara V.
Minakov Mykola V.
Marchenko Nataliya M.
Myslyvchenko Oleksandr M.
Romanko Petro M
Sidorin Gennahij P
Samoilenko Lydia A.
Smirnova Tetiana P.
Tolochyn Oleksandr I
Tsyganenko Natalia I
Chopovska Vira P.
Shuryhin Borys V
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2023-01-03
