J Mater Sci Technol ›› 2009, Vol. 25 ›› Issue (05): 603-606.

• Articles • Previous Articles     Next Articles

Dynamic Recrystallization Behavior of a Fe-Cr-Ni Super-Austenitic Stainless Steel

A. Hoseini Asliy, A. Zarei-Hanzaki   

  1. School of Metallurgical and Materials Engineering, University of Tehran, Tehran, Iran
  • Received:2008-11-05 Revised:2009-07-07 Online:2009-09-28 Published:2009-10-10
  • Contact: Amir Hoseini Asli

Abstract:

The super-austenitic stainless steels are extensively utilized in the seamless tubes production for oil extraction industries. Due to the importance of thermo-mechanical processing in the production of these tubes, the dynamic recrystallization (DRX) characteristics of a Cr-Ni super austenitic stainless steel (1.4563) were
investigated in the present study. This was performed using the hot compression testing method in the temperature range of 950−1150°C and the strain rate of 10-3−10-1 s-1. The initiation and evolution of DRX were examined through microstructural analysis. The results indicated that the recrystallized grain formed a necklace type structure at the prior austenite grain boundaries at higher strain rates. In addition, DRX nucleation occurs by bulging and successive strain induced boundary migration (SIBM).

Key words: Sanicro 28, Dynamic recrystallization, Super-austenitic, Necklace structure