Al heat affected zone-less resistance element welded lap joints of Al alloy and 1 GPa class steel: Transition of microstructure and fracture with heat transfer
In this study, Al joint systems without heat-affected zones (HAZ) were developed on Al/Fe alloy lap joints fabricated by resistance element welding (REW). The robustness of the joints with and without HAZs was quantitatively evaluated to consider another side effect in REW Al/Fe alloy systems. Compa...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542303274X |
| _version_ | 1797338267411021824 |
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| author | Seungyeop Baek Junyeong Kim Taeyang Kwak Taejin Lee Hyun-chul Lee Chuantong Chen Peihao Geng Ninshu Ma Seung-Joon Lee Dongjin Kim |
| author_facet | Seungyeop Baek Junyeong Kim Taeyang Kwak Taejin Lee Hyun-chul Lee Chuantong Chen Peihao Geng Ninshu Ma Seung-Joon Lee Dongjin Kim |
| author_sort | Seungyeop Baek |
| collection | DOAJ |
| description | In this study, Al joint systems without heat-affected zones (HAZ) were developed on Al/Fe alloy lap joints fabricated by resistance element welding (REW). The robustness of the joints with and without HAZs was quantitatively evaluated to consider another side effect in REW Al/Fe alloy systems. Compared to conventional REW, removing the Al HAZ not only alters the steel properties, but also reduces the work hardening of the Al alloy due to the difference in the distinct heat transfer paths. Furthermore, the presence of Al HAZ significantly influenced the hardness characteristics of the molten steel portion. In the cold wall configuration without Al HAZ, hardness values exceeding those of the hot wall by approximately 100 Hv or more were observed. At a welding current of 10.5 kA, the hot wall configuration demonstrated an approximate 30 % increase in tensile shear load and a 66 % increase in displacement compared to the cold wall configuration without HAZ. In the cold wall conditions, interfacial failure (IF) was not attributed to microstructural disparities but was linked to the formation of an inherent notch root when S20C melted due to the absence of Al HAZ. Contrary to previous reports, the presence of HAZ in Al alloys results the production of tough steel through REW. |
| first_indexed | 2024-03-08T09:28:33Z |
| format | Article |
| id | doaj.art-15f72417516b44f2ae71b280bf183a81 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-08T09:28:33Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-15f72417516b44f2ae71b280bf183a812024-01-31T05:44:07ZengElsevierJournal of Materials Research and Technology2238-78542024-01-012835413565Al heat affected zone-less resistance element welded lap joints of Al alloy and 1 GPa class steel: Transition of microstructure and fracture with heat transferSeungyeop Baek0Junyeong Kim1Taeyang Kwak2Taejin Lee3Hyun-chul Lee4Chuantong Chen5Peihao Geng6Ninshu Ma7Seung-Joon Lee8Dongjin Kim9Multi Materials Research Center, Korea Automotive Technology Institute (KATECH), 471-4, Gwangsan-gu, Gwang-Ju, Republic of Korea; Joining and Welding Research Institute (JWRI), Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka, 567-0047, JapanJoining and Welding Research Institute (JWRI), Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan; Department of Mechanical Engineering, Graduate School, Chosun University, 309, Pilmun-daero, Dong-gu, Gwang-Ju, Republic of KoreaRUAN co., Ltd., Room 203, 64, Gilju-ro, Bucheon-si, Gyeonggi-do, Republic of KoreaRUAN co., Ltd., Room 203, 64, Gilju-ro, Bucheon-si, Gyeonggi-do, Republic of KoreaMulti Materials Research Center, Korea Automotive Technology Institute (KATECH), 471-4, Gwangsan-gu, Gwang-Ju, Republic of KoreaInstitute of Scientific and Industrial Research, Osaka University, Osaka, 567-0047, JapanJoining and Welding Research Institute (JWRI), Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka, 567-0047, JapanJoining and Welding Research Institute (JWRI), Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan; Co-corresponding author.Department of Advanced Materials Engineering, Tech University of Korea, Siheung-si, Gyeonggi-do, 15073, Republic of KoreaMicro-Joining center, Korea Institute of Industrial Technology (KITECH), 156 Gaetbeol-ro, Yeonsu-gu, Incheon, 21999, Republic of Korea; Corresponding author.In this study, Al joint systems without heat-affected zones (HAZ) were developed on Al/Fe alloy lap joints fabricated by resistance element welding (REW). The robustness of the joints with and without HAZs was quantitatively evaluated to consider another side effect in REW Al/Fe alloy systems. Compared to conventional REW, removing the Al HAZ not only alters the steel properties, but also reduces the work hardening of the Al alloy due to the difference in the distinct heat transfer paths. Furthermore, the presence of Al HAZ significantly influenced the hardness characteristics of the molten steel portion. In the cold wall configuration without Al HAZ, hardness values exceeding those of the hot wall by approximately 100 Hv or more were observed. At a welding current of 10.5 kA, the hot wall configuration demonstrated an approximate 30 % increase in tensile shear load and a 66 % increase in displacement compared to the cold wall configuration without HAZ. In the cold wall conditions, interfacial failure (IF) was not attributed to microstructural disparities but was linked to the formation of an inherent notch root when S20C melted due to the absence of Al HAZ. Contrary to previous reports, the presence of HAZ in Al alloys results the production of tough steel through REW.http://www.sciencedirect.com/science/article/pii/S223878542303274XHardnessAluminum alloysGrainsinterfacesREWHAZ |
| spellingShingle | Seungyeop Baek Junyeong Kim Taeyang Kwak Taejin Lee Hyun-chul Lee Chuantong Chen Peihao Geng Ninshu Ma Seung-Joon Lee Dongjin Kim Al heat affected zone-less resistance element welded lap joints of Al alloy and 1 GPa class steel: Transition of microstructure and fracture with heat transfer Journal of Materials Research and Technology Hardness Aluminum alloys Grains interfaces REW HAZ |
| title | Al heat affected zone-less resistance element welded lap joints of Al alloy and 1 GPa class steel: Transition of microstructure and fracture with heat transfer |
| title_full | Al heat affected zone-less resistance element welded lap joints of Al alloy and 1 GPa class steel: Transition of microstructure and fracture with heat transfer |
| title_fullStr | Al heat affected zone-less resistance element welded lap joints of Al alloy and 1 GPa class steel: Transition of microstructure and fracture with heat transfer |
| title_full_unstemmed | Al heat affected zone-less resistance element welded lap joints of Al alloy and 1 GPa class steel: Transition of microstructure and fracture with heat transfer |
| title_short | Al heat affected zone-less resistance element welded lap joints of Al alloy and 1 GPa class steel: Transition of microstructure and fracture with heat transfer |
| title_sort | al heat affected zone less resistance element welded lap joints of al alloy and 1 gpa class steel transition of microstructure and fracture with heat transfer |
| topic | Hardness Aluminum alloys Grains interfaces REW HAZ |
| url | http://www.sciencedirect.com/science/article/pii/S223878542303274X |
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