The sandwich-structured advanced high strength steel to resist the liquid metal embrittlement
There exists a direct correlation between the alloy elements and the formation of the liquid metal embrittlement (LME) in the advanced high strength steel (AHSS). In the present study, a sandwich-structure AHSS-#2 + IF (Interstitial-free) sheet with the equivalent tensile strength compared with the...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423014096 |
| _version_ | 1797745189160222720 |
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| author | Wufeng Dong Hua Pan Yu Sun Jiayi Zhou Ming Lei Kai Ding Yulai Gao |
| author_facet | Wufeng Dong Hua Pan Yu Sun Jiayi Zhou Ming Lei Kai Ding Yulai Gao |
| author_sort | Wufeng Dong |
| collection | DOAJ |
| description | There exists a direct correlation between the alloy elements and the formation of the liquid metal embrittlement (LME) in the advanced high strength steel (AHSS). In the present study, a sandwich-structure AHSS-#2 + IF (Interstitial-free) sheet with the equivalent tensile strength compared with the AHSS-#1 sheet is designed and fabricated to resist the LME cracks. The welded joints with normal structure (RSW joint of galvanized steel AHSS-#1) reveal the higher LME susceptibility than the sandwich-structured one. The maximum length of the detected LME cracks is 1062.9 μm for type I crack (located at the center of the weld) and 152.2 μm for type II crack (located at the shoulder of the weld). Based on the results of the element distribution in the regions near the LME cracks, the internal oxide layer and element segregation are detected for the welded joint with normal structure. The formation of the internal oxide and the element segregation could largely deteriorate the cohesion of the boundaries especially for the region directly contacted with the Zn coating, triggering the formation of the LME cracks. With the protection of the IF steel as the covering layer on AHSS-#2, however, the regions with element segregation are successfully separated from the Zn coating, dramatically decreasing the corresponding LME susceptibility. |
| first_indexed | 2024-03-12T15:19:49Z |
| format | Article |
| id | doaj.art-587f40bf57e04f4d9a809d37f07ba4b1 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:19:49Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-587f40bf57e04f4d9a809d37f07ba4b12023-08-11T05:33:46ZengElsevierJournal of Materials Research and Technology2238-78542023-07-012531673176The sandwich-structured advanced high strength steel to resist the liquid metal embrittlementWufeng Dong0Hua Pan1Yu Sun2Jiayi Zhou3Ming Lei4Kai Ding5Yulai Gao6State Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Development and Application Technology of Automotive Steels, Shanghai 201900, PR China; Automobile Steel Research Institute, R&D Center, Baoshan Iron & Steel Co., Ltd., Shanghai 201900, PR ChinaState Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR ChinaState Key Laboratory of Development and Application Technology of Automotive Steels, Shanghai 201900, PR China; Automobile Steel Research Institute, R&D Center, Baoshan Iron & Steel Co., Ltd., Shanghai 201900, PR China; Corresponding author. State Key Laboratory of Development and Application Technology of Automotive Steels, Shanghai 201900, PR ChinaState Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR China; Corresponding author.State Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR China; Shanghai Engineering Research Center for Metal Parts Green Remanufacture, Shanghai 200444, PR China; Corresponding author. State Key Laboratory of Advanced Special Steel, Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, PR China.There exists a direct correlation between the alloy elements and the formation of the liquid metal embrittlement (LME) in the advanced high strength steel (AHSS). In the present study, a sandwich-structure AHSS-#2 + IF (Interstitial-free) sheet with the equivalent tensile strength compared with the AHSS-#1 sheet is designed and fabricated to resist the LME cracks. The welded joints with normal structure (RSW joint of galvanized steel AHSS-#1) reveal the higher LME susceptibility than the sandwich-structured one. The maximum length of the detected LME cracks is 1062.9 μm for type I crack (located at the center of the weld) and 152.2 μm for type II crack (located at the shoulder of the weld). Based on the results of the element distribution in the regions near the LME cracks, the internal oxide layer and element segregation are detected for the welded joint with normal structure. The formation of the internal oxide and the element segregation could largely deteriorate the cohesion of the boundaries especially for the region directly contacted with the Zn coating, triggering the formation of the LME cracks. With the protection of the IF steel as the covering layer on AHSS-#2, however, the regions with element segregation are successfully separated from the Zn coating, dramatically decreasing the corresponding LME susceptibility.http://www.sciencedirect.com/science/article/pii/S2238785423014096Sandwich structureLiquid metal embrittlementAdvanced high strength steelResistance spot weldingElement distribution |
| spellingShingle | Wufeng Dong Hua Pan Yu Sun Jiayi Zhou Ming Lei Kai Ding Yulai Gao The sandwich-structured advanced high strength steel to resist the liquid metal embrittlement Journal of Materials Research and Technology Sandwich structure Liquid metal embrittlement Advanced high strength steel Resistance spot welding Element distribution |
| title | The sandwich-structured advanced high strength steel to resist the liquid metal embrittlement |
| title_full | The sandwich-structured advanced high strength steel to resist the liquid metal embrittlement |
| title_fullStr | The sandwich-structured advanced high strength steel to resist the liquid metal embrittlement |
| title_full_unstemmed | The sandwich-structured advanced high strength steel to resist the liquid metal embrittlement |
| title_short | The sandwich-structured advanced high strength steel to resist the liquid metal embrittlement |
| title_sort | sandwich structured advanced high strength steel to resist the liquid metal embrittlement |
| topic | Sandwich structure Liquid metal embrittlement Advanced high strength steel Resistance spot welding Element distribution |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423014096 |
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