INVITATION: Seminar - presentation Prof. Xu Dongsheng, 30/06/2025 at 13:00, Dvorak Hall

On behalf of Petr Šittner, you are cordially invited to the Department Seminar, featuring a presentation by Prof. Xu Dongsheng from the Institute of Metal Research, Chinese Academy of Sciences. 

The seminar will be held on Monday, June 30, 2025, at 13:00 in the Dvořák Hall (main building FZU, next to reception and entrance)

Title: Multiscale simulations for mechanism understanding and process optimization in titanium alloys

Abstract: Titanium alloys have been used widely in aerospace, chemical, marine and automobile industries due to their high strength, low density, excellent fatigue and corrosion resistance. The mechanical properties of these alloys are often achieved by complicated thermal mechanical processing. In spite of the great efforts in the last several decades, the clarification of the dynamic mechanism of the deformation and phase transformation during the fabrication and service of titanium alloys are still challenging, therefore multiscale simulations have been carried out, in order to understand the mechanisms governing the mechanical properties of the alloys. Deformation / transformation and defect formation mechanism under different condition are revealed with the help of MD simulation. It was also shown that during the deformation of polycrystalline metals, the migration of grain boundaries in polycrystalline materials play important role to the mechanical properties including creep and fatigue. MD and phase field simulations show that stress and dislocations may promote the nucleation of specific variants during phase transformation, and may facilitate the formation of special grain boundary and texture, and may play crucial role to the strengthening and long-term stability of materials, therefore should be pursuit for the microstructure design. The macroscale simulations on the melting, forging, rolling, Gleeble compression, and processes optimization will also be introduced briefly.