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The change of the strain energy density in the different crystal planes of the cubical γ phase occurs during creep at high temperature, and the cubical γ phase in the alloy is directionally grown along the crystal plane with bigger strain energy. Then, the change of the atomic potential energy, interfacial energy and lattice misfit stress is thought to be the driving force for promoting the elements...
By means of measuring creep curves, microstructure observation and FEM analysis of the stress field near the hole, an investigation has been made into the influence of the defects on creep behaviors and microstructure evolution of single crystal nickel-based superalloys. Results show that the creep lifetimes and plasticity of the single crystal nickel based superalloys are obviously decreased by microstructure...
By means of the tensile creep property measurement of alloy oriented single crystal nickel-based superalloy and microstructure observation, the characteristics of microstructure evolution to determine. Using the stress-strain finite element method (FEM) for calculating the von Mises stress in the coherent interface of the cubic γ'/γ phases, the influence of the applied stress on the stress distribution...
Based on finite element method and genetic algorithms dynamic mathematical model is established, and the simulation of stress distribution around the defects of single crystal nickel-based superalloysis also established with ANSYS. After the change of stress field with time is analyzed, the result is compared with that achieved through numerical calculation and experimental analysis. The comparison...
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