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High-temperature alloys in general and superalloys in particular are strengthened by ordered intermetallic phases that are relatively stable at elevated temperatures. Because of their low symmetry, however, these ordered intermetallic phases have rather complicated deformation mechanisms that are difficult to uncover by experiment alone. In this study we use a combination of ab initio calculation...
We develop a dislocation climb model based on a phase field description that couples non-conservative dislocation motion and vacancy diffusion. A reaction–diffusion model is incorporated where vacancy transport is governed by the Cahn–Hilliard equation, while the binding of vacancies to dislocation cores is described as adsorptive reaction. The model extends the previously developed phase field microelasticity...
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