Superduplex stainless steels combine high mechanical properties with excellent corrosion resistance. They have a special structure made of micron-thick strips. To better understand the transformations involved in their manufacture, this structure is finely observed using a Transmission Electron Microscope (TEM). The horizontal line at the halfway point of the image delimits the ferrite at the top from the austenite at the bottom and is an interface of interest in the study of these two components of steel. The deformation stored in the material creates surprising contrasts that invite us to use our imagination.
This image was taken at the CCEM at McMaster University in Canada as part of a visit made possible by his many exchanges with SIMaP.
About the author: Damien Tresallet is a 3rd year PhD student in the PM group. His thesis is funded by the CEMAM labex and is in partnership with APERAM society.