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Mechanical behaviour and corrosion study of 304L austenitic steel processed by constrained groove pressing

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Title Mechanical behaviour and corrosion study of 304L austenitic steel processed by constrained groove pressing
 
Creator Singh, Rahul
Singh, Samarjit
Kumar, Balina Kranthi
Kumar, Abhishek
 
Subject Austenitic stainless steel (Type-304L)
Constrained groove pressing
Corrosion behavior
Phase transformation
 
Description 258-264
In the present work, 304L-austenitic stainless steel has been successfully processed till two passes of constrained groove
pressing (CGP). The processed steel has been characterized using X-ray diffraction and a vibrating sample magnetometer.
The XRD patterns and vibrating sample magnetometer confirms phase transformation (austenitic phase to martensitic
phase). CGP of 304L austenitic steel improves mechanical properties such as tensile strength, yield strength and
micro-hardness. The ultimate tensile strength value improves from 775 MPa to 1156 MPa, the value of yield strength
improves from 332 MPa to 639 MPa and the microhardness improves from 244 VHN to 476 VHN for solution-treated, and
two pass CGP processed specimens, respectively. The influence of CGP has also been reflected in electron backscatter
diffraction (EBSD) results in terms of more substructure formation. The corrosion behavior has been estimated via linear
polarization and electrochemical impedance spectroscopy tests. The CGPed 304L steel shows poor resistance to corrosion in
comparison to parent steel. Polarization resistance values decrease from 27.88 to 12.63 kΩ/cm2 which represents loose and
less protective passivating film after CGP.
 
Date 2021-09-10T04:55:16Z
2021-09-10T04:55:16Z
2021-06
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/58092
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJEMS Vol.28(3) [June 2021]