Datum
2022-10-26Schlagwort
600 Technik Ferritischer StahlEdelstahlLaserschweißenImpulslaserInterkristalline KorrosionKornwachstumKornfeinungAusscheidungMetadata
Zur Langanzeige
Aufsatz
Grain growth and precipitation behaviour of AISI 430 ferritic stainless steel subjected to pulsed laser beam welding using free-form pulse shaping
Zusammenfassung
Ferritic stainless steels are prone to grain coarsening and precipitation of chromium-rich grain boundary phases during fusion welding, which increase intergranular corrosion susceptibility. State-of-the-art techniques to overcome these challenges mainly feature heterogeneous nucleating agents with regard to grain coarsening or alternating alloy concepts as well as post-weld heat treatments as for restoration of intergranular corrosion resistance. The present investigation seeks to depart from these traditional approaches through the use of a tailored heat input during pulsed laser beam welding by means of free-form pulse shaping. Grain size analysis using electron backscatter diffraction shows a substantial reduction of grain size as compared to continuous-wave lasers due to a distinctive columnar to equiaxed transition. Moreover, phase analyses reveal the overcoming of chromium carbide precipitation within the heat-affected zone. As corrosion tests demonstrate, intergranular attack is therefore concentrated on the weld metal. In comparison to continuous-wave laser beam welding, intergranular corrosion susceptibility is substantially reduced for very short pulse durations. From these results, it can be derived that pulsed laser beam welding using free-form pulse shaping enables direct control of heat input and, thus, tailored grain growth and precipitation formation properties.
Zitierform
In: Welding in the World Volume 67 / Issue 1 (2022-10-26) , S. 51-62 ; eissn:1878-6669Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202301267424,
author={Sommer, Niklas and Stredak, Florian and Wiegand, Michael and Böhm, Stefan},
title={Grain growth and precipitation behaviour of AISI 430 ferritic stainless steel subjected to pulsed laser beam welding using free-form pulse shaping},
journal={Welding in the World},
year={2022}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2022$n2022 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/14390 3000 Sommer, Niklas 3010 Stredak, Florian 3010 Wiegand, Michael 3010 Böhm, Stefan 4000 Grain growth and precipitation behaviour of AISI 430 ferritic stainless steel subjected to pulsed laser beam welding using free-form pulse shaping / Sommer, Niklas 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/14390=x R 4204 \$dAufsatz 4170 5550 {{Ferritischer Stahl}} 5550 {{Edelstahl}} 5550 {{Laserschweißen}} 5550 {{Impulslaser}} 5550 {{Interkristalline Korrosion}} 5550 {{Kornwachstum}} 5550 {{Kornfeinung}} 5550 {{Ausscheidung}} 7136 ##0##http://hdl.handle.net/123456789/14390
2023-01-27T15:40:44Z 2023-01-27T15:40:44Z 2022-10-26 doi:10.17170/kobra-202301267424 http://hdl.handle.net/123456789/14390 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ ferritic stainless steel pulsed laser beam welding intergranular corrosion grain coarsening grain refinement precipitation kinetics 600 Grain growth and precipitation behaviour of AISI 430 ferritic stainless steel subjected to pulsed laser beam welding using free-form pulse shaping Aufsatz Ferritic stainless steels are prone to grain coarsening and precipitation of chromium-rich grain boundary phases during fusion welding, which increase intergranular corrosion susceptibility. State-of-the-art techniques to overcome these challenges mainly feature heterogeneous nucleating agents with regard to grain coarsening or alternating alloy concepts as well as post-weld heat treatments as for restoration of intergranular corrosion resistance. The present investigation seeks to depart from these traditional approaches through the use of a tailored heat input during pulsed laser beam welding by means of free-form pulse shaping. Grain size analysis using electron backscatter diffraction shows a substantial reduction of grain size as compared to continuous-wave lasers due to a distinctive columnar to equiaxed transition. Moreover, phase analyses reveal the overcoming of chromium carbide precipitation within the heat-affected zone. As corrosion tests demonstrate, intergranular attack is therefore concentrated on the weld metal. In comparison to continuous-wave laser beam welding, intergranular corrosion susceptibility is substantially reduced for very short pulse durations. From these results, it can be derived that pulsed laser beam welding using free-form pulse shaping enables direct control of heat input and, thus, tailored grain growth and precipitation formation properties. open access Sommer, Niklas Stredak, Florian Wiegand, Michael Böhm, Stefan doi:10.1007/s40194-022-01398-y Ferritischer Stahl Edelstahl Laserschweißen Impulslaser Interkristalline Korrosion Kornwachstum Kornfeinung Ausscheidung publishedVersion eissn:1878-6669 Issue 1 Welding in the World 51-62 Volume 67 false
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