Hot Deformation Behavior and Processing Maps of Cr-Ni-Mn-N Austenitic Stainless Steel

Abstract:

The hot deformation behavior of a Cr-Ni-Mn-N series stainless steel was studied at temperatures from 850°C to 1175°C with the strain rate ranging from 0.01 s−1 to 10 s−1 using a Gleeble-3500 simulator. The constitutive equation and processing maps were compiled based on a hot compression test to strain of 0.9. The deformation microstructures were observed systematically by optical microscopy. Results show that the efficiency of power dissipation gradually increases with rising temperature and decreasing strain rate. The maps at strains of 0.5 and 0.9 show two distinct domains with one having the peak efficiency of about 28–35% at 1150°C–1175°C and 1–10 s−1 and the other having the peak efficiency of about 33–45% at 1050°C–1150°C and 0.01–0.5 s−1, while complete recrystallization is evident.

• Periodical: Materials Science Forum (Volumes 704-705)
• Pages: 210-215
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.704-705.210
• Online since: December 2011
• Authors: Er Bao, Ming Jia Wang, Zi Xi Wang, Huan He
• Keywords: Cr-Ni-Mn-N Austenitic Stainless Steel, Hot Deformation Map, Microstructure

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