Influence of Initial Microstructure on Hot Deformation Behavior of Duplex Stainless Steels

Subject Areas : Chemistry

M Pouyamanesh ¹ , B Eghbali ² , Gh. R Ebrahimi ³ , M Saadati ⁴

1 - Department of Materials Engineering, Esfarayen University, Esfarayen, Iran
2 - School of Materials Engineering, Sahand University of Technology, Tabriz, Iran
3 - Department of Material Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
4 - Department of Materials Engineering, Esfarayen University, Esfarayen, Iran

Received: 2012-09-01 Accepted : 2012-12-01 Published : 2013-04-01

Keywords: Duplex stainless steel, Hot compression, Flow curves, Dynamic recovery, Dynamic recrystallization,

Abstract :

In this research the effect of initial microstructure on hot deformation behavior in terms of Ferrite-to-Austenite ratios is studied. Two types of stainless steels C1 and C2 were homogenizing heat-treated and deformed under hot compression examinations at temperatures 900ºC and 1100ºC at strain rate of 0.1s-1. The results showed that the flow stress levels of specimens are strongly related to deformation parameters and initial microstructures of steels. Moreover, during cooling from 1350ºC to the deformation temperature, flow stress level increased for both samples because of increment in austenite content.