Effect of Argon-Purged Cooling on Generating Residual Stress in Oxide Scale Formed on Si-Containing Steels Examined by <i>In Situ</i> X-ray Diffraction and Finite Element Analysis

Comparison of thermal stress FEM calculations and experimental stress values of FeO formed at 900°C. The FEM model from 700 to 600°C was two layer model comprising FeO/steel plate and from 500°C to room temperature was three layer model comprising Fe3O4/FeO/steel plate. The arrow indicated that the stress was discontinuously changed due to change of the scale structure. The dominant thermal stress was generated between 700 and 600°C as well as between 500°C and RT.