“学萃讲坛”第729期--Computer modeling of structure formation and formation of high level of performance characteristics for low-modulus high-elastic bcc alloys (feminological approach)等

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  报告题目:1. Computer modeling of structure formation and formation of high level of performance characteristics for low-modulus high-elastic bcc alloys (feminological approach).
       2. High entropy alloys (HEA) – new class of advanced materials.
  报告人:1. Dr. Valerii V. KartuzovScientific Secretary and Department HeadInstitute for Problems in Materials ScienceNAS of Ukraine
      2.  Dr. TamaraGrygorivna Roguleading research worker of the Department of Strength and Plasticity of Metals, Frantsevich Institute for Problems in Materials Science, NAS of Ukraine
  报告时间:2018113日 上午九点
  报告地点:基础楼433学术报告厅|
  主办单位:科学技术研究院
  承办单位:材料科学与化学工程学院

  报告人简介1Dr. Valerii V. Kartuzov, Scientific Secretary and Department HeadInstitute for Problems in Materials ScienceNAS of Ukraine. As a head of computer modeling in materials science department and scientific secretary at Frantsevich Institute for Problems in Materials Science NAS of Ukraine (IPMS NASU)he hassupervised and has been a PI of more than 30 international grants and contracts with the US Army Research Laboratory, US AFRL, Navy and EOARD, NATO for Peace Programs and TARDEC.His research interests include various ceramics, cermets, ceramic-ceramic composites, high strength glasses, nanomaterials, Al foams, CBF (continuous basalt fibers) and their combinations.today his prime focus is on organization and performance of materials science projects targeted on development of advanced materials for leading industries. The team involved in such projects includes good specialists not only from IPMS (mathematicians, physics, chemists, technologies) but from other NASU institutes and carries out complex investigations (from fundamental R&D, materials prototypes up to organization of pilot production of materials and articles made from those materials). He has published more than 100 SCI journal papers papers and more than 50 conference papers and 3 books.

  报告内容1Being based on phase-field theory (PFT) method, microstructural kinetics is studied for multicomponent systems which form single-phase solid solutions with a single bcc phase. PFT equations, which are nonlinear parabolic equations of diffusion type for phase variables, are based on fundamental principles of thermodynamics and adequately include a description of entropy effects and allow to derive a dependence of structural properties of these materials versus kinetics and system main parameters (such as mixing enthalpy, cooling rate of melt, number of components, etc.). This approach also allows to investigate the effect of multi-component on diffusion character (delayed diffusion into high entropy alloys)

  报告人简介2Dr. TamaraGrygorivna Rogulleading research worker of the Department of Strength and Plasticity of Metals, Frantsevich Institute for Problems in Materials Science, NAS of Ukraine.  His research interests include Current field according to the current position and Current scientific activity.  He has published more than 80 SCI journal papers.

  报告内容2Definition of high entropy alloys - formal criteria and thermodynamic bases. The rule of phases. Element base for HEAs. Structure formation in HEAs. Eliminating elements. Features of formation of phases - single-phase and multiphase HEAs. Factors affecting solid solution hardening - dimensional and elastic mismatch, clustering of structure. Classification of HEAs. Grain boundaries and interfaces. Thermal stability of HEAs. Features of contact interaction of HEAs with other materials. Young's modulus and melting point. High entropy carbides, oxides and nitrides.