Journal of Materials Science and Engineering with Advanced TechnologyAuthor's: S. Maropoulos, A. Tsouknidas, I. Melas, D. Kountouras, Sofia Papanikolaou and Xaritini Boulgaraki
Pages: [165] - [175]
Received Date: October 4, 2010
Submitted by:
The decomposition of δ-ferrite to austenite has been studied in SAF2205 by using optical and electron microscopy. Heat treatment was conducted at varying temperatures and the effect of temperature on the microstructure was systematically investigated, while the cooling method was also considered as variables. It was found that the maximum amount of austenite occurs at 850°C and the precipitation of sigma phase in ferrite occurs at 980°C. Chemical analysis showed that Cr and Mo partition to the ferrite and Ni and Mn to the austenite. The results were compared with those obtained from calculations based on thermodynamic data, and it was found that the cooling medium has a significant impact the experimental-analytical correlation.
dual phase steels, heat treatment, austenite-ferrite equilibrium.
