Evaluation of solidification cracking susceptibility during laser welding in advanced high strength automotive steels
Solidification cracking susceptibility during laser welding was studied experimentally and numerically in advanced high strength steel sheets, namely transformation-induced plasticity (TRIP) and dual phase (DP) steel. Using the same heat input, laser bead-on-plate welding was carried out on single s...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-12-01
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| Series: | Materials & Design |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127519305428 |
| _version_ | 1811233370113310720 |
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| author | G. Agarwal A. Kumar I.M. Richardson M.J.M. Hermans |
| author_facet | G. Agarwal A. Kumar I.M. Richardson M.J.M. Hermans |
| author_sort | G. Agarwal |
| collection | DOAJ |
| description | Solidification cracking susceptibility during laser welding was studied experimentally and numerically in advanced high strength steel sheets, namely transformation-induced plasticity (TRIP) and dual phase (DP) steel. Using the same heat input, laser bead-on-plate welding was carried out on single sided clamped specimens at various starting distances from the free edge. It was observed that TRIP steel with high phosphorus is susceptible to cracking while in DP steel with low phosphorus, solidification cracking was not observed. The metallurgical factors affecting the solidification cracking were studied and it was found that solidification morphology, phosphorus segregation at the prior austenite grain boundaries, inclusions, interface growth rate and interdendritic liquid feeding have a prominent effect on the strength of the mushy zone. These results are discussed pertaining to the cracking mechanism. For the same welding parameters, a difference in the weld pool shape was observed in both the steels, which is attributed to the high temperature thermophysical properties. Weld pool shape affects the strain distribution in the mushy region and thus the cracking behaviour. The cracking phenomenon is further described using hot ductility curves. Keywords: Solidification cracking, Weld pool shape, Advanced high strength steels, Automotive, Laser welding |
| first_indexed | 2024-04-12T11:19:32Z |
| format | Article |
| id | doaj.art-f22d1000744b4e66bf588d866fa90a95 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-12T11:19:32Z |
| publishDate | 2019-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-f22d1000744b4e66bf588d866fa90a952022-12-22T03:35:25ZengElsevierMaterials & Design0264-12752019-12-01183Evaluation of solidification cracking susceptibility during laser welding in advanced high strength automotive steelsG. Agarwal0A. Kumar1I.M. Richardson2M.J.M. Hermans3Corresponding author.; Department of Materials Science and Engineering, Faculty of 3mE, Delft University of Technology, Mekelweg 2, 2628CD Delft, the NetherlandsDepartment of Materials Science and Engineering, Faculty of 3mE, Delft University of Technology, Mekelweg 2, 2628CD Delft, the NetherlandsDepartment of Materials Science and Engineering, Faculty of 3mE, Delft University of Technology, Mekelweg 2, 2628CD Delft, the NetherlandsDepartment of Materials Science and Engineering, Faculty of 3mE, Delft University of Technology, Mekelweg 2, 2628CD Delft, the NetherlandsSolidification cracking susceptibility during laser welding was studied experimentally and numerically in advanced high strength steel sheets, namely transformation-induced plasticity (TRIP) and dual phase (DP) steel. Using the same heat input, laser bead-on-plate welding was carried out on single sided clamped specimens at various starting distances from the free edge. It was observed that TRIP steel with high phosphorus is susceptible to cracking while in DP steel with low phosphorus, solidification cracking was not observed. The metallurgical factors affecting the solidification cracking were studied and it was found that solidification morphology, phosphorus segregation at the prior austenite grain boundaries, inclusions, interface growth rate and interdendritic liquid feeding have a prominent effect on the strength of the mushy zone. These results are discussed pertaining to the cracking mechanism. For the same welding parameters, a difference in the weld pool shape was observed in both the steels, which is attributed to the high temperature thermophysical properties. Weld pool shape affects the strain distribution in the mushy region and thus the cracking behaviour. The cracking phenomenon is further described using hot ductility curves. Keywords: Solidification cracking, Weld pool shape, Advanced high strength steels, Automotive, Laser weldinghttp://www.sciencedirect.com/science/article/pii/S0264127519305428 |
| spellingShingle | G. Agarwal A. Kumar I.M. Richardson M.J.M. Hermans Evaluation of solidification cracking susceptibility during laser welding in advanced high strength automotive steels Materials & Design |
| title | Evaluation of solidification cracking susceptibility during laser welding in advanced high strength automotive steels |
| title_full | Evaluation of solidification cracking susceptibility during laser welding in advanced high strength automotive steels |
| title_fullStr | Evaluation of solidification cracking susceptibility during laser welding in advanced high strength automotive steels |
| title_full_unstemmed | Evaluation of solidification cracking susceptibility during laser welding in advanced high strength automotive steels |
| title_short | Evaluation of solidification cracking susceptibility during laser welding in advanced high strength automotive steels |
| title_sort | evaluation of solidification cracking susceptibility during laser welding in advanced high strength automotive steels |
| url | http://www.sciencedirect.com/science/article/pii/S0264127519305428 |
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