A quantitative multi-phase-field model for non-isothermal and polycrystalline solidification was developed applied to dilute multicomponent alloys with hexagonal close-packed structures. The effects of Lewis coefficient undercooling on dendrite growth were investigated systematically. Results show that large coefficients facilitate the release latent heat, which can accelerate while suppress ti...

Hot deformation is one of the main technological stages products made from metallic materials. It strictly required to decrease costs developing optimized technologies at this stage without a significant in products’ quality. The present investigation offers an algorithm unite three different models predict hot behavior, fracture, and microstructure evolution. compression tension tests AISI 316...

The paper demonstrates the capability of developed phase transformation model to design cooling conditions in Stelmor process allowing for obtaining different types microstructures wire rod 32CrB4 steel. based on modified JMAK equation was using results tests conducted a DIL 805 A/D/T dilatometer. is composed sub-models ferritic, pearlitic, bainitic and martensitic transformations. Its predicti...

A coupled thermal-microstructural simulation model was developed to estimate the thermal history in a eutectoid steel wire rod under continuous cooling and forced-convection. The phenomena of heat transfer, phase transformation estimation boundary condition. histories were analyzed at different rates emulate forced-convection conditions by air-jet as controlled conveyor. acquired used calculate...

Three cocrystals of the light-stable compound 1,1,6,6-tetraphenyl-2,4-hexadiyne-1,6-diol (I) with light-sensitive molecules 1,2-dimethyl-2(1H)-pyridinone (a), 6-methyl-2(1H)pyridinone (b) and 2-methyl-2(1H)-pyridinone (c) were exposed to UV light. It was found that the molecules undergo molecular flip perpendicular to the molecular plane (rotation of ∼180°). In the first two cocrystals, the lig...

Abstract The effects of Nb addition on the recrystallization kinetics and recrystallized grain size distribution after cold deformation were investigated by using Fe-30Ni Fe-30Ni-0.044 wt pct steel with comparable starting distributions. samples deformed to 0.3 strain at room temperature followed annealing 950 °C 850 for various times; microstructural evolution non- fully characterized, along s...

Abstract. Dynamic recrystallization of high-speed steel (HSS) M2 occurs through a discontinuous mechanism, involving nucleation and growth strain-free grains. The initiation completion dynamic (dDRX) must be carried out in single rolling pass. time for 99% dDRX depends on the critical strain, strain rate equivalent that generated workpiece material level plays key role terms possibility to comp...