Founding Research Journal

Founding Research Journal

Effect of As Cast Microstructure on Recrystallization and ‎Recovery Processes of 2304 Duplex Stainless Steel

Document Type : Original Research Article

Authors
Hossein Alinejad 1
Bahman Korojy 2
1 PhD Student, Materials and Industrial Engineering Department, Babol Noshirvani University of Technology
2 Assistant Professor, Materials and Polymer Engineering Department, Hakim Sabzevari University, Sabzevar, Iran.
10.22034/frj.2018.150953.1053
Abstract
In this research, the effect of cast microstructure on the recovery and recrystallization process of 2304 duplex stainless steel has been investigated. The specimens were hot-formed at low temperatures of 850°C and 950 °C and high temperatures of 1050 and 1150°C by using hot compression test machine at strain rates of 0.001 to 1 s−1. The microstructure changes were studied using optical microscopy equipped by image analyzer. In addition, the apparent activation energies were determined based on the stress-strain hot compression curves. The results show that during of hot deformation of 2304 two-phase stainless steel, the restoration mechanisms in two phase are different, it is performed by dynamic recovery in the ferrite phase and by recrystallization process in the austenite phase. The apparent activation energy Q of the cast microstructure at 850  and 1150  temperatures of hot working is 325 and 150 kJ/mol respectively, which is lower than the applied wrought microstructure.
Keywords
Casting duplex stainless steel
Recrystallization
Recovery
Apparent activation energy
Hot working
Subjects
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Founding Research Journal
Volume 2, Issue 3 - Serial Number 6
Autumn 2018
Pages 201-209

  • Receive Date 03 October 2018
  • Revise Date 12 December 2018
  • Accept Date 12 December 2018