نتایج جستجو برای: microstructural evolution
تعداد نتایج: 353951 فیلتر نتایج به سال:
Pure ZA27 alloys and with Cu Mg additions were cast deformed by compression. Samples of both heat treated at 460°C after deformation the evolution microstructure as a function time measured. The results showed that average grain size increases increase for alloys, coarsening rate which is 55% lower alloyed alloy than pure alloy. X-ray diffraction analysis indicated containing present ε phase no...
A phase-field formulation is introduced to simulate quantitatively microstructural pattern formation in alloys. The thin-interface limit of this formulation yields a much less stringent restriction on the choice of interface thickness than previous formulations and permits one to eliminate nonequilibrium effects at the interface. Dendrite growth simulations with vanishing solid diffusivity show...
We demonstrate how three "state-of-the-art" techniques may be combined to build a bridge between atomistics and microstructure: (1) first-principles calculations, (2) a mixed-space cluster expansion approach, and (3) the diffuse-interface phase-field model. The first two methods are used to construct the driving forces for a phase-field microstructural model of theta'- Al2Cu precipitates in Al:...
κ-carbide in lightweight steel is studied. Its thermal stability, crystal morphology, orientation relationship, degree of lattice misfit and mechanical properties are measured experimentally. The mechanisms for the microstructural evolution of κ-carbide are considered based on the crystal structure, lattice misfit, element diffusivity, and solute partition. The hard γ/κ grain and ductile α+κ gr...
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