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Invited researcher Alexey Yuriyevich Vinogradov
Contract number
11.G34.31.0031
Time span of the project
2010-2014

As of 30.01.2020

30
Number of staff members
242
scientific publications
23
Objects of intellectual property
General information

Name of the project: Developing physical principles and creating technologies for monitoring integrity and forecasting dangerous states of materials, mechanism and structures in real time

Strategy for Scientific and Technological Development Priority Level: д

Goals and objectives

Research directions: Machinery

Project objective:

  • Increasing efficiency of machinery technologies and expensive equipment working under extreme stress
  • Reducing risks of technogenic catastrophes by monitoring the state and controlling technological processes based on using ultrasound oscillations as feedback


The practical value of the study

  • We have conceived principles of determining the critical state of structural materials under monotonous and cyclical strains, the principles are based on the modern method of acoustic emissions.
  • New algorithms have been developed for locating the source of signal of acoustic emission, a reliable method of analysis of signals and big data flows.
  • New methods have been proposed for monitoring operating capacity and determining the critical state of rotating parts.
  • Our laboratory has shown hardware and software schemes for creating prospective monitoring and diagnostic devices to determine early formation of defects and disruption of normal operation of static industrial objects including critical, dangerous objects under big load, as well as of various dynamic systems. A prototype of such system has been created.
  • Our researchers have experimentally proven existence of linear defects of dislocational type in metallic glass.
  • New phenomenological models have been developed for acoustic emission during plastic deformation of metals and alloys based on non-equillibrium thermodynamics and dislocation kinetics.
  • New methods have been developed for quantitative fractography for evaluating impact of hydrogen on qualities of disintegration processes.
  • We have shown connection between microstructure with processes of hydrogen transfer and hydrogen embrittlement and unveiled many details of importance of plastic deformation in hydrogen embrittlement mechanisms.
  • Our researchers have obtained experimental data in mechanical damage and fatigue of a new class of high-duty materials with ultra-fine grain and nanocrystalline structure obtained by the method of big plastic deformations.
  • New theoretical models have been suggested for structure formation under plastic deformations as well as models of mechanical behavior of bulk nanostructural materials obtained using this methods.
  • We have researched mechanical behavior of magnesium alloys where the key role is played by interactions between dislocations and mechanical twins.
  • Our laboratory has suggested a new microstructually justified model to describe processes of magnesium silicates deformation considering researched kinetics of twinning.
  • Our researchers have formulated the main requirements for microstructure and properties of magnesium alloys necessary for biomedical technologies.
  • We have obtained some samples alloys with unique levels of durability and fatigue characteristics that have not been achieved before.

Implemented results of research:

We have transferred technological documentation for creating intellectual systems to monitor dangerous industrial objects to the small innovative enterprise «LAES» LLC within the Decree of the Government of Russia No 217.

Education and career development:

  • The laboratory has conducted international schools «Physical materials science» with over 1200 participants.
  • We have released several volumes of the «Prospective materials» textbook.
  • 5 candidate dissertations and over 40 masters and bachelors dissertations have been defended.

Organizational and structural changes:

The Research Institute for Progressive technologies has been created on the basis of the Laboratory. The Institute consists of 5 research departments, the Research Center and the Scientific and Analytical Center of Physical, Chemical and Ecological Research.

Other results: The Laboratory has been accredited by the Federal Service for Ecological, Technological and Nuclear Supervision

Collaborations:

  • Kumamoto University (Japan): joint project within the Federal target program, conducting annual Russian-Japanese seminars, joint publications
  • Seoul National University (South Korea), Freiberg University of Mining and Technology (Germany), Charles University in Prague (Czech Republic): joint project within the Federal target program, joint publications

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Vinogradov A., Yasnikov I. S. and Estrin Y.
Evolution of Fractal Structures in Dislocation Ensembles during Plastic Deformation. Physical Review Letters 108(20): 205504 (2012).
Estrin Y., Vinogradov A.
Extreme Grain Refinement by Severe Plastic Deformation: A Wealth of Challenging Science. Acta Materialia 61(3): 782–817 (2013).
Pomponi E., Vinogradov A., Danyuk A.
Wavelet Based Approach to Signal Activity Detection and Phase Picking: Application to Acoustic Emission. Signal Processing 115: 110–119 (2015).
Vinogradov A., Seleznev M., Yasnikov I.
Dislocation Characteristics of Shear Bands in Metallic Glasses. Scripta Materialia 130(15): 138–142 (2017).
Vinogradov A., Estrin Y.
Analytical and Numerical Approaches to Modelling Severe Plastic Deformation. Progress in Materials Science 95: 172–242 (2018).
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