Investigations on the thermal conditions during laser beam welding of high-strength steel 100Cr6
This study examines the thermal conditions during laser beam welding of 100Cr6 high-strength steel using a TruDisk5000 disc laser with a continuous adjustable power range of 100–5000 W. Two parameter sets, characterized by laser power and welding speeds, were analyzed by thermal-metallurgical FE sim...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-05-01
|
| Series: | Advances in Industrial and Manufacturing Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666912923000077 |
| _version_ | 1827940481675296768 |
|---|---|
| author | Eric Wasilewski Nikolay Doynov Ralf Ossenbrink Vesselin Michailov |
| author_facet | Eric Wasilewski Nikolay Doynov Ralf Ossenbrink Vesselin Michailov |
| author_sort | Eric Wasilewski |
| collection | DOAJ |
| description | This study examines the thermal conditions during laser beam welding of 100Cr6 high-strength steel using a TruDisk5000 disc laser with a continuous adjustable power range of 100–5000 W. Two parameter sets, characterized by laser power and welding speeds, were analyzed by thermal-metallurgical FE simulations to determine their impact on the thermal conditions during welding. The results show a significant shift in heat coupling, with conduction transitioning to deep penetration welding. As a result of the high welding speeds and reduced energy input, extremely high heating rates up to 2∙104 K s−1 (set A) respectively 4∙105 K s−1 (set B) occur. Both welds thus concern a range of temperature state values for which conventional Time-Temperature-Austenitization (TTA) diagrams are currently not defined, requiring calibration of the material models through general assumptions. Also, the change in energy input and welding speed causes significantly steep temperature gradients with a slope of approximately 5∙103 K mm−1 and strong drops in the temperature rates, particularly in the heat affected zone. The temperature cycles also show very different cooling rates for the respective parameter sets, although in both cases they are well below a cooling time t8/5 of 1 s, so that the phase transformation always leads to the formation of martensite. Since the investigated parameters are known to cause a loss of technological strength and conditionally result in cold cracks, these results will be used for further detailed experimental and numerical investigation of microstructure, hydrogen distribution, and stress-strain development at different restraint conditions. |
| first_indexed | 2024-03-13T09:10:50Z |
| format | Article |
| id | doaj.art-4207320c1b304667b35fc085b9b3bae2 |
| institution | Directory Open Access Journal |
| issn | 2666-9129 |
| language | English |
| last_indexed | 2024-03-13T09:10:50Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Advances in Industrial and Manufacturing Engineering |
| spelling | doaj.art-4207320c1b304667b35fc085b9b3bae22023-05-27T04:26:54ZengElsevierAdvances in Industrial and Manufacturing Engineering2666-91292023-05-016100118Investigations on the thermal conditions during laser beam welding of high-strength steel 100Cr6Eric Wasilewski0Nikolay Doynov1Ralf Ossenbrink2Vesselin Michailov3Corresponding author.; Brandenburg University of Technology Cottbus - Senftenberg, Department of Joining and Welding Technology, Konrad-Wachsmann-Allee 17, 03046, Cottbus, GermanyBrandenburg University of Technology Cottbus - Senftenberg, Department of Joining and Welding Technology, Konrad-Wachsmann-Allee 17, 03046, Cottbus, GermanyBrandenburg University of Technology Cottbus - Senftenberg, Department of Joining and Welding Technology, Konrad-Wachsmann-Allee 17, 03046, Cottbus, GermanyBrandenburg University of Technology Cottbus - Senftenberg, Department of Joining and Welding Technology, Konrad-Wachsmann-Allee 17, 03046, Cottbus, GermanyThis study examines the thermal conditions during laser beam welding of 100Cr6 high-strength steel using a TruDisk5000 disc laser with a continuous adjustable power range of 100–5000 W. Two parameter sets, characterized by laser power and welding speeds, were analyzed by thermal-metallurgical FE simulations to determine their impact on the thermal conditions during welding. The results show a significant shift in heat coupling, with conduction transitioning to deep penetration welding. As a result of the high welding speeds and reduced energy input, extremely high heating rates up to 2∙104 K s−1 (set A) respectively 4∙105 K s−1 (set B) occur. Both welds thus concern a range of temperature state values for which conventional Time-Temperature-Austenitization (TTA) diagrams are currently not defined, requiring calibration of the material models through general assumptions. Also, the change in energy input and welding speed causes significantly steep temperature gradients with a slope of approximately 5∙103 K mm−1 and strong drops in the temperature rates, particularly in the heat affected zone. The temperature cycles also show very different cooling rates for the respective parameter sets, although in both cases they are well below a cooling time t8/5 of 1 s, so that the phase transformation always leads to the formation of martensite. Since the investigated parameters are known to cause a loss of technological strength and conditionally result in cold cracks, these results will be used for further detailed experimental and numerical investigation of microstructure, hydrogen distribution, and stress-strain development at different restraint conditions.http://www.sciencedirect.com/science/article/pii/S2666912923000077Laser beam weldingWelding temperature fieldTemperature ratesThermal-metallurgical FE simulationHigh-strength steel |
| spellingShingle | Eric Wasilewski Nikolay Doynov Ralf Ossenbrink Vesselin Michailov Investigations on the thermal conditions during laser beam welding of high-strength steel 100Cr6 Advances in Industrial and Manufacturing Engineering Laser beam welding Welding temperature field Temperature rates Thermal-metallurgical FE simulation High-strength steel |
| title | Investigations on the thermal conditions during laser beam welding of high-strength steel 100Cr6 |
| title_full | Investigations on the thermal conditions during laser beam welding of high-strength steel 100Cr6 |
| title_fullStr | Investigations on the thermal conditions during laser beam welding of high-strength steel 100Cr6 |
| title_full_unstemmed | Investigations on the thermal conditions during laser beam welding of high-strength steel 100Cr6 |
| title_short | Investigations on the thermal conditions during laser beam welding of high-strength steel 100Cr6 |
| title_sort | investigations on the thermal conditions during laser beam welding of high strength steel 100cr6 |
| topic | Laser beam welding Welding temperature field Temperature rates Thermal-metallurgical FE simulation High-strength steel |
| url | http://www.sciencedirect.com/science/article/pii/S2666912923000077 |
| work_keys_str_mv | AT ericwasilewski investigationsonthethermalconditionsduringlaserbeamweldingofhighstrengthsteel100cr6 AT nikolaydoynov investigationsonthethermalconditionsduringlaserbeamweldingofhighstrengthsteel100cr6 AT ralfossenbrink investigationsonthethermalconditionsduringlaserbeamweldingofhighstrengthsteel100cr6 AT vesselinmichailov investigationsonthethermalconditionsduringlaserbeamweldingofhighstrengthsteel100cr6 |