The feasibility of accurately measuring the size and the volume fraction of nano-scale plate-shaped precipitates by atomic force microscopy (AFM) has been explored. For quantitative evaluations their unhandy geometry is conveniently described as superellipsoids. The experimental alloy Ni 69 Co 9 Al 18 Ti 4 served as a model system: plate-shaped disordered γ-precipitates form in the L1 2-long-range ordered γ'-matrix. The results obtained by AFM are compared with those derived from transmission (TEM) and from high resolution scanning electron microscopy (SEM). The agreement between the AFM and the TEM results is good. In spite of the low number of SEM images taken, the same holds for Deleted: 8

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A metallurgical material description of the flow behavior for finite element (FE) simulations was developed. During hot compression tests, the dynamic microstructure evolution is modeled on the example of high‐strength martensitic steel MS‐W 1200. Compression tests at 900–1000 °C with a strain rate of 0.1 s−1 on fine‐grain and coarse‐grain samples were performed. An analysis of the flow behavior identified a strong correlation between the dynamic recrystallization kinetics and the initial microstructure. The regression analysis has been used to determine correction factors of the new model to describe the dynamic recrystallization. A good agreement between FE simulation and measurement shows the validity of the new model.