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

Sommer, Niklas
Kryukov, Igor
Wolf, Christian
Wiegand, Michael
Kahlmeyer, Martin
Böhm, Stefan

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.

Sponsor
Gefördert durch den Publikationsfonds der Universität Kassel
Citation
In: Metals Volume 10 / Issue 8 (2020-08-12) , S. 1088; EISSN 2075-4701
Collections
@article{doi:10.17170/kobra-202009111772,
  author    ={Sommer, Niklas and Kryukov, Igor and Wolf, Christian and Wiegand, Michael and Kahlmeyer, Martin and Böhm, Stefan},
  title    ={On the Intergranular Corrosion Properties of Thin Ferritic Stainless Steel Sheets Welded by Fiber-Laser},
  keywords ={600 and Interkristalline Korrosion and Ferritischer Stahl and Laserschweißen and Mikrostruktur and Mechanische Eigenschaft and Stabilisierung and Faserlaser and Feinblech and Stumpfstoß},
  copyright  ={http://creativecommons.org/licenses/by/4.0/},
  language ={en},
  journal  ={Metals},
  year   ={2020-08-12}
}