Effects of filler material selection on the microstructural, mechanical and corrosion properties of TIG welded AISI/SAE 304L stainless steel sheets and rings

Oğuz Akgül; Aziz Barış Başyiğit

doi:10.1515/mt-2021-2198

Article

Effects of filler material selection on the microstructural, mechanical and corrosion properties of TIG welded AISI/SAE 304L stainless steel sheets and rings

Oğuz Akgül
Oğuz Akgül was born in İstanbul in 1988. He has received his BSc degree at the Department of Mechanical Engineering, Çukurova University, Turkey, in 2011. He has worked at ‘MKEK Ammunition Factory’ as an engineer for 10 years. He has earned his MSc degree in the Department of Defense Technologies at Kırıkkale University, Turkey, in 2022.
and Aziz Barış Başyiğit

Published/Copyright: July 7, 2022

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From the journal Materials Testing Volume 64 Issue 7

Abstract

Austenitic stainless steels are mainly preferred especially for resistance to aggressive oxidizing medias and high temperature applications such as equipments and mechanical parts which are used in defense and conventional industries. In this study; 3 mm thick 304L austenitic stainless steel sheets and rings are joined to each other by using Tungsten Inert Gas welding method under pure argon shielding gas with ER316L and ER2209 filler metals. Weld metals and heat-affected zones of welded joints were examined by metallurgical and scanning electron microscopes. Microhardness, tensile and Charpy impact tests of weld regions are investigated. It has been determined that the filler metals have dominantly changed the microstructure of weld metals. The microhardness values of the welded samples joined with ER2209 filler metal was lower than the sample joined with ER316L filler metal in weld metal regions. Besides, corrosion tests indicated that the corrosion rates of welded samples joined with ER2209 filler metal is lower than the samples joined with ER316L filler metal.

Keywords: 304L stainless steel; corrosion rate; mechanical properties; phase analysis; TIG welding

Corresponding author: Aziz Barış Başyiğit, Metallurgical and Material Engineering Department, Kırıkkale University, Faculty of Engineering and Architecture, Yahşihan, Kırıkkale, Turkey, E-mail: abbasyigit@kku.edu.tr

About the author

Oğuz Akgül

Oğuz Akgül was born in İstanbul in 1988. He has received his BSc degree at the Department of Mechanical Engineering, Çukurova University, Turkey, in 2011. He has worked at ‘MKEK Ammunition Factory’ as an engineer for 10 years. He has earned his MSc degree in the Department of Defense Technologies at Kırıkkale University, Turkey, in 2022.

Acknowledgments

Authors express their respects to MKE Weapon Factory Heat and Surface Treatment Department Staff and Gazi University Welding Technologies Research and Application Center staff for optical metallurgical microscope supports.

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Published Online: 2022-07-07

Published in Print: 2022-07-26

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Articles in the same Issue

https://doi.org/10.1515/mt-2021-2198

Keywords for this article

304L stainless steel; corrosion rate; mechanical properties; phase analysis; TIG welding