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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/11082
Title: Characterization and Strain-Hardening Behavior of Friction Stir-Welded Ferritic Stainless Steel
Authors: Sharma G.
Dwivedi, Dheerendra Kumar
Jain, P. K.
Published in: Journal of Materials Engineering and Performance
Abstract: In this study, friction stir-welded joint of 3-mm-thick plates of 409 ferritic stainless steel (FSS) was characterized in light of microstructure, x-ray diffraction analysis, hardness, tensile strength, ductility, corrosion and work hardening properties. The FSW joint made of ferritic stainless steel comprises of three distinct regions including the base metal. In stir zone highly refined ferrite grains with martensite and some carbide precipitates at the grain boundaries were observed. X-ray diffraction analysis also revealed precipitation of Cr23C6 and martensite formation in heat-affected zone and stir zone. In tensile testing of the transverse weld samples, the failure eventuated within the gauge length of the specimen from the base metal region having tensile properties overmatched to the as-received base metal. The tensile strength and elongation of the longitudinal (all weld) sample were found to be 1014 MPa and 9.47%, respectively. However, in potentiodynamic polarization test, the corrosion current density of the stir zone was highest among all the three zones. The strain-hardening exponent for base metal, transverse and longitudinal (all weld) weld samples was calculated using various equations. Both the transverse and longitudinal weld samples exhibited higher strain-hardening exponents as compared to the as-received base metal. In Kocks–Mecking plots for the base metal and weld samples at least two stages of strain hardening were observed. © 2017, ASM International.
Citation: Journal of Materials Engineering and Performance (2017), 26(12): 5997-6005
URI: https://doi.org/10.1007/s11665-017-3020-0
http://repository.iitr.ac.in/handle/123456789/11082
Issue Date: 2017
Publisher: Springer New York LLC
Keywords: corrosion
microstructure
stainless steel
strain hardening
tensile properties
ISSN: 10599495
Author Scopus IDs: 57202314913
7004266679
7402520507
Author Affiliations: Sharma, G., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Dwivedi, D.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Jain, P.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Funding Details: The author would like to acknowledge the support and technical help received from Shivraman Thapliyal, research scholar, in Department of Mechanical and Industrial Engineering, IIT Roorkee.
Corresponding Author: Sharma, G.; Department of Mechanical and Industrial Engineering, Indian Institute of Technology RoorkeeIndia; email: gauraviitr1992@gmail.com
Appears in Collections:Journal Publications [ME]

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