Please use this identifier to cite or link to this item: http://dx.doi.org/10.25673/36354
Title: Transient softening at the fusion boundary of resistance spot welds : a phase field simulation and experimental investigations for Al–Si-coated 22MnB5
Author(s): Sherepenko, OleksiiLook up in the Integrated Authority File of the German National Library
Kazemi, OmidLook up in the Integrated Authority File of the German National Library
Rosemann, Paul
Wilke, Markus
Halle, ThorstenLook up in the Integrated Authority File of the German National Library
Jüttner, SvenLook up in the Integrated Authority File of the German National Library
Issue Date: 2020
Type: Article
Language: English
URN: urn:nbn:de:gbv:ma9:1-1981185920-365867
Subjects: Resistance spot welding
Metallurgy
High strength steel
Phase evolution
Abstract: This work gives an insight into the transient softening at the fusion boundary of resistance spot welds on hot stamped steel. Metallographic investigations and hardness mapping were combined with finite phase–field modeling of phase evolution at the fusion boundary. Saturation of weld nugget growth in the welding process was observed. For industrially relevant, long welding times, the fusion boundary of a spot weld is therefore isothermally soaked between the peritectic and solidus temperatures. This leads to a carbon segregation to the liquid phase due to higher carbon solubility and possibly to δ-Fe formation at the fusion boundary. Both results in a local carbon depletion at the fusion boundary. This finding is in good agreement with carbon content measurements at the fusion boundary and the results of hardness measurements.
URI: https://opendata.uni-halle.de//handle/1981185920/36586
http://dx.doi.org/10.25673/36354
Open Access: Open access publication
License: (CC BY 4.0) Creative Commons Attribution 4.0(CC BY 4.0) Creative Commons Attribution 4.0
Sponsor/Funder: DFG-Publikationsfonds 2020
Journal Title: Metals
Publisher: MDPI
Publisher Place: Basel
Volume: 10
Issue: 1
Original Publication: 10.3390/met10010010
Page Start: 1
Page End: 13
Appears in Collections:Fakultät für Maschinenbau (OA)

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