Characterization and modeling of oxides precipitation in ferritic steels during fast non-isothermal consolidation
Source abstract
Abstract
Abstract The precipitation behavior of nanosized binary Y 2 O 3 and complex Y 2 Ti 2 O 7 precipitates in oxide-dispersion strengthened ferritic steels was modeled by a nucleation, growth and coarsening thermodynamic approach. Focus was made on non-isothermal treatments that simulate typical consolidation processes of nanostructured steels. In order to assess the model for fast non-isothermal treatments, a field-assisted consolidation process was used. The precipitation state was characterized at nanoscale by transmission electron microscopy, small-angle neutron scattering and atom-probe tomography. Both simulation and experimental results demonstrated the following precipitation mechanisms: (i) rapid nucleation of both Y 2 O 3 and Y 2 Ti 2 O 7 during the heating stage (ii) limited growth and coarsening of nanoclusters during soaking time and further annealing at high temperature (1100 °C). A new coefficient diffusion of yttrium in ferrite was proposed to assess the thermal stability of nano-oxides.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fusion materials and technologies · Microstructure and mechanical properties · Advanced Materials Characterization Techniques
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