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Modeling Solid-State Precipitation by Ernst Kozeschnik

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Chapter 6

Heterogeneous Precipitation

In this chapter, models are introduced and discussed, which are useful in precipitation modeling and can, in one or the other, be coupled with the approaches discussed in the previous chapters. Many of the traditional models have been developed under simplifying geometrical assumptions for the benefit of simplicity. With the theory and concepts of this chapter, these models can be advanced and extended for situations where the original concepts do not apply.

6.1 Precipitation at Grain Boundaries

 

Nucleation at dislocations, grain boundaries, or other microstructural heterogeneities (see Section 2.4) is often preferred over homogeneous nucleation for particles with high volumetric misfit or crystallographic ...

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