Objective
Operation features of many devices, machine components, instruments depend stantially on state of their surfaces. Selective surface processing by high-intensity energy beam (ion, electron, laser treatment) is one of the most perspective directions in modern material science and surface engineering. These techniques permit to effectively increase microhardness, wear- , heat- and corrosion- resistance for metal products, including complex geometry. Most of the surface treatment techniques are based on heating, melting and impact loading processes. Successful realization of surface treatment technologies requires precise prediction and on-line control of thermal influence and melt depths, heating and cooling rates, and front velocities. Precise quantitative analysis of energy beam action requires simultaneous consideration of unsteady nonlinear heat transfer and thermoelasticity problems, with temperature dependencies of parameters and complex geometry of treated samples been taken into account. The objectives of the project are:
Software development (LSCAN-3D, FEPAS) and complex analysis of 2D and 3D
temperature and thermo-elastic fields induced by scanning energy beam in
finite-size steel and ferrous-based products.
Software development (MELT-2D) and complex analysis of dynamics of phase
transformations: melting, evaporation, crystallization, in homogeneous and
multi-layer materials irradiated by ultra-short high-power energy pulses.
Determination of optimal regimes for operations of surface treatment:
surface amorphisation, placating, cladding of metals and alloys. To reach the objectives, universal approach for computational algorithms construction will be developed that unify finite-difference approach to unsteady multidimensional heat transfer problems and finite-element approach to elasticity problems. Multifront free boundary problems with explicit front tracking will be solved using dynamically adaptive computational grids. The numerical algorithms will be realized in the form of software.
Topic(s)
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0117 Chemnitz
Germany