Journal Published Online: 19 June 2019
Volume 8, Issue 5

Investigation on Grain Boundary Character Distribution During Dynamic Recrystallization of Austenitic Stainless Steel During Hot Deformation

CODEN: MPCACD

Abstract

The phenomenon of dynamic recrystallization (DRX) is central to the hot working and thermomechanical processing of austenitic stainless steel. This study aims to relate two distinct parameters that influence DRX: the content of interstitial atoms, such as nitrogen, and character of grain boundaries in the steel. 316LN austenitic stainless steel has been subjected to thermomechanical processing at 1,423 K through uniaxial compression at different strain rates. At these, the microstructure is fully recrystallized. The nature, character, and growth of DRX grains are studied using Electron Backscatter Diffraction (EBSD). EBSD is used to determine grain boundary character distribution and the Effective Grain Boundary Energy (EGBE) parameter. The evolution of EGBE and its relation to grain growth are analyzed. The concomitant development of special low-energy boundaries is correlated with the interstitial content in the steel, thus linking interstitial content to EGBE. The correlations so made are tested by examining the corrosion resistance of different boundaries formed at different deformation conditions.

Author Information

Kumar, Santosh
Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India Homi Bhabha National Institute, Training School Complex, Mumbai, India
Aashranth, B.
Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India
Samantaray, Dipti
Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India
Davinci, M. Arvinth
Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India
Borah, Utpal
Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India
Bhaduri, A. K.
Materials Development and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, India Homi Bhabha National Institute, Training School Complex, Mumbai, India
Pages: 12
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: MPC20190025
ISSN: 2379-1365
DOI: 10.1520/MPC20190025