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Article

On the Intergranular Corrosion Properties of Thin Ferritic Stainless Steel Sheets Welded by Fiber-Laser

by
Niklas Sommer
*,
Igor Kryukov
,
Christian Wolf
,
Michael Wiegand
,
Martin Kahlmeyer
and
Stefan Böhm
Department for Cutting and Joining Manufacturing Processes, Institute for Production Technologies and Logistics, University of Kassel, Kurt-Wolters-Straße 3, 34125 Kassel, Germany
*
Author to whom correspondence should be addressed.
Metals 2020, 10(8), 1088; https://doi.org/10.3390/met10081088
Submission received: 19 June 2020 / Revised: 3 August 2020 / Accepted: 8 August 2020 / Published: 12 August 2020
(This article belongs to the Special Issue Microstructure and Properties of Metallic Heat-Affected Zones)
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Abstract

In the present investigation, thin sheets of stabilized and unstabilized ferritic stainless steel were welded in butt joint configuration using irradiation of a 1070 nm fiber-laser. Using optical microscopy, the microstructural evolution upon alternating heat input was characterized. In addition to that, hardness and tensile tests were carried out on the specimens. Detailed focus was given to the intergranular corrosion properties, which were investigated on basis of the Strauss test with different times of exposure to the corrosive environment. Following these tests, the mechanical properties of the joints were characterized using tensile tests. A combination of the latter with an inspection by μ-CT analysis allows for the proposition of an intergranular corrosion rate with regard to the degradation of the joint strength.
Keywords: intergranular corrosion; ferritic stainless steel; laser welding; microstructure; mechanical properties; stabilization; fiber-laser; thin sheets; butt joint intergranular corrosion; ferritic stainless steel; laser welding; microstructure; mechanical properties; stabilization; fiber-laser; thin sheets; butt joint

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MDPI and ACS Style

Sommer, N.; Kryukov, I.; Wolf, C.; Wiegand, M.; Kahlmeyer, M.; Böhm, S. On the Intergranular Corrosion Properties of Thin Ferritic Stainless Steel Sheets Welded by Fiber-Laser. Metals 2020, 10, 1088. https://doi.org/10.3390/met10081088

AMA Style

Sommer N, Kryukov I, Wolf C, Wiegand M, Kahlmeyer M, Böhm S. On the Intergranular Corrosion Properties of Thin Ferritic Stainless Steel Sheets Welded by Fiber-Laser. Metals. 2020; 10(8):1088. https://doi.org/10.3390/met10081088

Chicago/Turabian Style

Sommer, Niklas, Igor Kryukov, Christian Wolf, Michael Wiegand, Martin Kahlmeyer, and Stefan Böhm. 2020. "On the Intergranular Corrosion Properties of Thin Ferritic Stainless Steel Sheets Welded by Fiber-Laser" Metals 10, no. 8: 1088. https://doi.org/10.3390/met10081088

APA Style

Sommer, N., Kryukov, I., Wolf, C., Wiegand, M., Kahlmeyer, M., & Böhm, S. (2020). On the Intergranular Corrosion Properties of Thin Ferritic Stainless Steel Sheets Welded by Fiber-Laser. Metals, 10(8), 1088. https://doi.org/10.3390/met10081088

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