Effect of recrystallization on degree of sensitization in nickel free austenitic stainless steel
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 23 September 2021
Issue publication date: 9 November 2021
Abstract
Purpose
Effect of grain size on degree of sensitization (DOS) was been evaluated in Nickel free steel. Manganese and nitrogen contained alloy is a Ni-free austenitic stainless steels (ASS) having type 202 grade. The main purpose of this investigation is to find the effect of recrystallization on the DOS of stainless steel after the thermo-mechanical processing (cold work and thermal aging).
Design/methodology/approach
In the present investigation, the deformation of 202 grade analyzed using X-ray diffraction (XRD) and microstructural testing. Optical microstructure of Ni-free ASS has been done for cold worked samples with thermally aged at 900°C_6 h. Double loop electrochemical potentiodynamic reactivation test used for findings of degree of sensitization.
Findings
Ni-free ASS appears to be deformed more rapidly due to its higher stacking fault energy which gave results in rapid transformation from strain induced martensite to austenite in form of recrystallized grains, i.e. it concluded that as cold work percentage increases more rapidly recrystallization occurs. XRD results also indicate that more fraction of martensite formed as percentage of CW increases but as thermal aging reverted those all martensite to austenite. So investigation gives the conclusion which suggests that with high deformation at higher temperature and duration gives very less DOS.
Originality/value
Various literatures available for 300 series steel related to the effect of cold work on mechanical properties and sensitization mechanism. However, no one has investigated the effect of recrystallization through thermomechanical processing on the sensitization of nickel-free steel.
Keywords
Acknowledgements
The authors are thankful to Dr Ankur Bansod, Assistant Professor, Mechanical Engineering department, Vel Tech Rangarajan Sagunthala R&D Institute of Science and Technology, Chennai, 600062, India, for his valuable guidance to make this research a success.
Citation
Shukla, S., Patil, A.P., Kawale, A., Kotta, A.B. and Ullah, I. (2021), "Effect of recrystallization on degree of sensitization in nickel free austenitic stainless steel", Anti-Corrosion Methods and Materials, Vol. 68 No. 6, pp. 530-537. https://doi.org/10.1108/ACMM-09-2020-2376
Publisher
:Emerald Publishing Limited
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