Mn vaporization control and stress-induced martensite transformation in high-manganese steel welds under different laser keyhole conditions
Vaporization modeling of high-Mn steel during laser welding, along with the effects of Mn vaporization on the tensile properties at room and cryogenic temperatures, were investigated for various laser defocusing (LD) conditions. The LD10 exhibited a full penetration keyhole, while LD20 showed a part...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424025705 |
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| author | Myeonghwan Choi Daewon Cho Kwang-Hyeon Lee Namhyun Kang |
| author_facet | Myeonghwan Choi Daewon Cho Kwang-Hyeon Lee Namhyun Kang |
| author_sort | Myeonghwan Choi |
| collection | DOAJ |
| description | Vaporization modeling of high-Mn steel during laser welding, along with the effects of Mn vaporization on the tensile properties at room and cryogenic temperatures, were investigated for various laser defocusing (LD) conditions. The LD10 exhibited a full penetration keyhole, while LD20 showed a partial penetration keyhole. The vaporization modeling based on computational fluid dynamics (CFD) analysis confirmed that a significant Mn flux occurred in LD20, which corresponded with the most substantial loss of Mn observed in the partially penetrated weld. The room temperature tensile testing showed a slight increase in the yield strength and a minor reduction in tensile elongation for LD20, which could be attributed to the stress-induced ε-martensitic transformation. In cryogenic tensile testing, LD20 exhibited a higher yield strength with more martensitic transformation, including some stress-induced α′-martensitic transformation observed. Through the vaporisztion modeling, significant Mn vaporization in LD20 was found to decrease the stacking fault energy, which enhanced stress-induced martensite transformation and yielding stress during tensile deformation at 110 and 298 K. |
| format | Article |
| id | doaj-art-1181e6ec802f497a897b5724c089c23f |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-1181e6ec802f497a897b5724c089c23f2024-12-26T08:55:21ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013365656575Mn vaporization control and stress-induced martensite transformation in high-manganese steel welds under different laser keyhole conditionsMyeonghwan Choi0Daewon Cho1Kwang-Hyeon Lee2Namhyun Kang3Department of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of KoreaBusan Machinery Research Centre, Korea Institute of Machinery and Materials, 48, Mieumsandan 5-ro 41beon-gil, Gangseo-gu, Busan, 46744, Republic of KoreaBusan Machinery Research Centre, Korea Institute of Machinery and Materials, 48, Mieumsandan 5-ro 41beon-gil, Gangseo-gu, Busan, 46744, Republic of KoreaDepartment of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea; Corresponding author.Vaporization modeling of high-Mn steel during laser welding, along with the effects of Mn vaporization on the tensile properties at room and cryogenic temperatures, were investigated for various laser defocusing (LD) conditions. The LD10 exhibited a full penetration keyhole, while LD20 showed a partial penetration keyhole. The vaporization modeling based on computational fluid dynamics (CFD) analysis confirmed that a significant Mn flux occurred in LD20, which corresponded with the most substantial loss of Mn observed in the partially penetrated weld. The room temperature tensile testing showed a slight increase in the yield strength and a minor reduction in tensile elongation for LD20, which could be attributed to the stress-induced ε-martensitic transformation. In cryogenic tensile testing, LD20 exhibited a higher yield strength with more martensitic transformation, including some stress-induced α′-martensitic transformation observed. Through the vaporisztion modeling, significant Mn vaporization in LD20 was found to decrease the stacking fault energy, which enhanced stress-induced martensite transformation and yielding stress during tensile deformation at 110 and 298 K.http://www.sciencedirect.com/science/article/pii/S2238785424025705Vaporization modelingKeyhole behaviorLaser weldingAustenitic high-manganese steelMartensitic transformation |
| spellingShingle | Myeonghwan Choi Daewon Cho Kwang-Hyeon Lee Namhyun Kang Mn vaporization control and stress-induced martensite transformation in high-manganese steel welds under different laser keyhole conditions Journal of Materials Research and Technology Vaporization modeling Keyhole behavior Laser welding Austenitic high-manganese steel Martensitic transformation |
| title | Mn vaporization control and stress-induced martensite transformation in high-manganese steel welds under different laser keyhole conditions |
| title_full | Mn vaporization control and stress-induced martensite transformation in high-manganese steel welds under different laser keyhole conditions |
| title_fullStr | Mn vaporization control and stress-induced martensite transformation in high-manganese steel welds under different laser keyhole conditions |
| title_full_unstemmed | Mn vaporization control and stress-induced martensite transformation in high-manganese steel welds under different laser keyhole conditions |
| title_short | Mn vaporization control and stress-induced martensite transformation in high-manganese steel welds under different laser keyhole conditions |
| title_sort | mn vaporization control and stress induced martensite transformation in high manganese steel welds under different laser keyhole conditions |
| topic | Vaporization modeling Keyhole behavior Laser welding Austenitic high-manganese steel Martensitic transformation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424025705 |
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