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­­­Investigation of strain rate sensitive materials forming

Priority areas of development: mathematics
2016
Department: Laboratory of Simulation Modelling

Goal of research:

Investigation of the techniques for constructing of constitutive equations describing the mechanical properties of the materials during hat forming processes.

Methodology:

The continuum mechanics methods are used for modeling of objects of study. The theories of viscoplastic and superplastic forming as well as computer methods solving boundary value problems of continuum mechanics are used for simulation of forming processes.

Empirical base of research:

The research is based on empirical data obtained by tensile and free bulging testing of the investigated alloys.

Results of research:

Mathematical relations and computer algorithms allowing one to simulate forming of the material during free bulging testing.

Recommendations aimed to improve an adequacy of simulation results of gas forming technologies by correction of the constitutive constants in order to take into account the differences between its behavior in uniaxial and biaxial tension conditions.

Empirical data describing the behavior of several industrial alloys in conditions of uniaxial and biaxial tension.

Level of implementation, recommendations on implementation or outcomes of the implementation of the results

The results can be recommended for introduction at the enterprises of machine-building and aircraft industries on the design of gas forming technology.

Publications:


Kotov A., Mikhaylovskaya A., Kishchik M., Tsarkov A., Aksenov S. A., Portnoy V. Superplasticity of high-strength Al-based alloys produced by thermomechanical treatment // Journal of Alloys and Compounds. 2016. Vol. 688. P. 336-344. doi
Захарьев И. Ю., Аксенов С. А., Логашина И. В. Применение обратного анализа для определения реологических констант материалов по результатам тестовых формовок круглых мембран // Металлург. 2016. 
Yakovtseva O., Mikhaylovskaya A., Kotov A., Portnoy V. Effect of Alloying on Superplasticity of Two-Phase Brasses // Физика металлов и металловедение. 2016. Vol. 117. No. 7. P. 742-748. doi
Mikhaylovskaya A., Yakovtseva O., Cheverikin V., Kotov A., Portnoy V. Superplastic behaviour of Al-Mg-Zn-Zr-Sc-based alloys at high strain rates // Materials Science and Engineering: A. 2016. No. 659. P. 225-233. doi
Захарьев И. Ю., Аксенов С. А. Обработка результатов тестовых формовок круглых мембран для определения реологических констант материалов, in: Тезисы докладов V Международного научного семинара «Динамическое деформирование и контактное взаимодействие тонкостенных конструкций при воздействии полей различной физической природы».. Москва : МЦВДНТ «Москва», 2016. С. 77-78. 
Churyumov A. Y., Mikhaylovskaya A. V., Bazlov A., Tsarkov A. A., Kotov A. D., Aksenov S. Influence of Al3Ni crystallisation origin particles on hot deformation behaviour of Al-Ni and Al-Ni-Mg alloys // Philosophical Magazine. 2017. 
Churyumov A. Y., Mikhaylovskaya A. V., Bazlov A., Tsarkov A. A., Kotov A. D., Aksenov S. Influence of Al3Ni crystallisation origin particles on hot deformation behaviour of Al-Ni and Al-Ni-Mg alloys // Philosophical Magazine. 2017. 
Zakhariev I. Y., Aksenov S. A. Influence of a material rheological characteristics on the dome thickness during free bulging test // Journal of Chemical Technology and Metallurgy. 2017. Vol. 52. No. 5. P. 1002-1007. 
Kishchik M. S., Mikhailovskaya A. V., Levchenko V. S., Kotov A., Drits A. M., Portnoy V. K. Formation of fine-grained structure and superplasticity in commercial aluminum alloy 1545ch // Металловедение и термическая обработка металлов. 2017. Vol. 58. No. 9. P. 543-547. doi