METALS, ALLOYS, CERAMICS

METALS, ALLOYS, CERAMICS:

- Development, fabrication and investigation of bulk nano- and microcrystalline alloys: Al-Mg-Mn, Al-Zn-Mg, Al-Si, Al-Sc, Mg-Al-Zn, Mg-Zn-Zr, Cu-Cr-Zr (equal-channel angular pressing technology);
- Development, fabrication and investigation of new metal and ceramic nanomaterials (spark plasma sintering technology);

- Development and research of new superplastic materials for high-rate and low-temperature superplastic forming;

- Methods of main gas pipeline metal diagnostics in view of pipe steel ageing.

Main results:

- Development of Mg-Al and Mg-Zn microcrystalline magnesium alloys with low-temperature superplasticity with record-setting parameters: elongation to failure of more than 800 % at the deformation temperature of 250?С;
- Development of Al-Mg-Sc-Zr nano- and microcrystalline aluminium alloys with high-speed superplasticity. Record characteristics have been obtained: elongation to failure of more than 2,500 % at the deformation rate of 5 mm/sec;
- Development of new Al-Si piston alloys with high-rate superplasticity. Record-setting characteristics have been obtained: elongation to failure of 200 % at the deformation rate of 1 mm/sec and at the temperature of 500 ?С;
- Development of nano- and microcrystalline copper alloys. Main results: Increased strength (by the factor of 3), plasticity (by the factor of 2) and hardness (by the factor of 4);
- Development of Al-Mg-Mn nano- and microcrystalline aluminium alloys having simultaneously doubled the strength and plasticity at room temperature, and high-rate superplasticity at elevated deformation temperatures. Record characteristics have been obtained: Strength – 450 МPa, plasticity – 25 %, superplasticity at 250 ?С – 320 %;
- A set of new methods of investigating the structure and properties of pipe steel in main gas pipelines (MGP) has been developed. It includes:
- Methods for predicting technical conditions and remaining life of MGP pipes;
- An approach to the deion of ageing and stress-corrosion in MGP pipe steel;
- A set of relaxation tests for MGP pipe steel;
- A set of corrosion tests for MGP pipe steel.

The leading expert:

- Professor Vladimir Chuvildeev, Sc.D. (Physics and Mathematics).

Main technological and research equipment:

- Processing equipment, press and stamp plant for fabricating bulk nano- and microcrystalline metal materials by the method of equal-channel angular pressing;
- Processing equipment for spark plasma sintering of powder nanomaterials (SPS625 sintering machine);
- An automated complex for investigating superplastic properties of materials with deformation rates up to 5.0 l/sec at temperatures up to 1,200 ?С on the basis of Tinius Olsen H25K-S tensile tester;
- АСС-1, an automated complex for measuring microplastic characteristics of metals at room and elevated temperatures;
- An automated complex for investigating internal friction in metals and alloys in the Hz and kHz ranges of frequencies: acoustic resonance unit (kHz range of frequencies) and a reverse torsion pendulum unit (Hz range of frequencies);
- An automated complex for carrying out fatigue tests at room and elevated temperatures;
- Scanning electron microscope Jeol JSM-6490.

Main partners:

- Institute of Metallurgy of the Russian Academy of Sciences;
- Institute of Applied Physics of the Russian Academy of Sciences;
- Institute of Solid-State Physics of the Russian Academy of Sciences;
- Livermore National Laboratory (USA);
- University of Tennessee (USA).

Main customers:
- RFNС-VNIIEF;
- Vyksa Metal Works JSC;
- Kamensk-Uralsk Metal Works JSC;
- FFPK MELAKS JSC;
- Rifmet JSC;
- PKO Teploobmennik JSC;
- Sedakov NIIIS Federal Sate Unitary Enterprise.

Key projects (financing sources):

- A joint project with Livermore National Laboratory covered by International Scientific and Technical Center (ISTC) grant No. 1413, 2809.
- Projects covered by Russian Foundation for Basic Research grants No. 02-03-33043а, 03-02-16923а, 05-08-18262а, 06-08-01119а, 08-02-99047-r_ofi, 08-08-99142-r_ofi.
- Projects covered by the U.S. Civilian Research and Development Foundation (CRDF) grants No. RE2-2230, Y2-P--01-04, Y2-Е-01-03, RUX0-001-NN-06 №BP3C0.
- The analytical departmental target program of the Federal Agency for Education «Development of the scientific potential of higher education institutions», RNP.2.1.1.711.

Main publications:
- Chuvildeev, V.N., Gryaznov, M.Yu., Kopylov, V.I., Sysoev, A.N., Lopatin, Yu.G., Superplasticity of Al–18%Si microcrystalline hypereutectic alloy, Doklady Akademii Nauk; 2008, 419, No. 2, pp. 189-192.
- Chuvildeev, V.N., Kopylov, V.I., Gryaznov, M.Yu., Sysoev, A.N., Ovsyannikov, B.V., Flyagin, A.A. Effect of doubling the strength and plasticity of AMg6 commercial aluminum alloy after processing by ECAP technology; Doklady Akademii Nauk, 2008, 423, No. 3, pp. 336-339.
- Chuvildeev, V.N., Gryaznov, M.Yu., Kopylov, V.I., Sysoev, A.N., Ovsyannikov, B.V., Flyagin, A.A. Mechanical properties of АМg6 microcrystalline aluminium alloy; Vestnik of the University of Nizhni Novgorod, 2008, No. 4, pp. 35-43.
- Chvuil’deev, V.N., Gryaznov, M.Yu., Kopylov, V.I., Sysoev, A.N., Ovsyannikov, B.V., Flyagin, A.A. Doubling of strength and plasticity of AMg6 commercial aluminum alloy processed by ECAP technology – in the book “Aluminum alloys. Their physical and mechanical properties ” (Eds. Hirsch, J., Skrotzki, B., Gottstein, G.), 2008, v.2, pp.1723-1729.
- Egorov, S.V., Eremeev, A.G., Plotnikov, I.V., Sorokin, A.A., Bykov, Yu.V., Chuvildeev, V.N., Gryaznov, M.Yu., Shotin, S.V. Plastic deformation of ultradispersed oxide ceramics at microwave heating; Rossiyskie Nanotekhnologii, 2008, volume 3, No. 5-6, pp.13-16.

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