Improvement in microstructure and mechanical properties of laser welded steel/aluminum alloy lap joints using high-entropy alloy interlayer
This study focused on the effect of a high-entropy alloy (HEA) interlayer on the improvement of microstructure and mechanical properties of steel/Al alloy lap joints by laser welding. The FeCoCrNiCu HEA improved metallurgical reaction by restricting the formation of Fe–Al intermetallic compounds (IM...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422011024 |
| _version_ | 1797991959632019456 |
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| author | He Zhou Xiaopeng Gu Xiaoyan Gu Juan Dong Guocheng Xu |
| author_facet | He Zhou Xiaopeng Gu Xiaoyan Gu Juan Dong Guocheng Xu |
| author_sort | He Zhou |
| collection | DOAJ |
| description | This study focused on the effect of a high-entropy alloy (HEA) interlayer on the improvement of microstructure and mechanical properties of steel/Al alloy lap joints by laser welding. The FeCoCrNiCu HEA improved metallurgical reaction by restricting the formation of Fe–Al intermetallic compounds (IMCs) at the interface. Results showed that in the steel on Al alloy lap joint without an interlayer, the discontinuous multi-phase IMCs layer mainly consisted of three types of IMCs, Fe-rich β-FeAl phases, and Al-rich θ-Fe4Al13 + η-Fe2Al5 phases. With the addition of a HEA interlayer, owing to the sluggish diffusion effect in the fusion zone (FZ), the diffusion of Fe atoms from FZ to the IMCs layer was significantly controlled, which limited the generation of IMCs at the FZ/Al alloy interface. The IMCs layer was only composed of single-phase β-FeAl with the absence of highly brittle Al-rich IMCs and the thickness of IMCs layer was reduced from 85 μm to 30 μm, resulting in the enhancement of toughness of the joint. Additionally, the improvement of mechanical properties of the joint, including microhardness and tensile shear strength was consistence with the reduction of brittleness of IMCs at the interface. |
| first_indexed | 2024-04-11T09:00:25Z |
| format | Article |
| id | doaj.art-48c43570e0ca430ba8e97c0f05985266 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T09:00:25Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-48c43570e0ca430ba8e97c0f059852662022-12-22T04:32:47ZengElsevierJournal of Materials Research and Technology2238-78542022-09-0120139146Improvement in microstructure and mechanical properties of laser welded steel/aluminum alloy lap joints using high-entropy alloy interlayerHe Zhou0Xiaopeng Gu1Xiaoyan Gu2Juan Dong3Guocheng Xu4Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, Jilin province, ChinaKey Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, Jilin province, ChinaKey Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, Jilin province, ChinaKey Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, Jilin province, ChinaCorresponding author.; Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, Jilin province, ChinaThis study focused on the effect of a high-entropy alloy (HEA) interlayer on the improvement of microstructure and mechanical properties of steel/Al alloy lap joints by laser welding. The FeCoCrNiCu HEA improved metallurgical reaction by restricting the formation of Fe–Al intermetallic compounds (IMCs) at the interface. Results showed that in the steel on Al alloy lap joint without an interlayer, the discontinuous multi-phase IMCs layer mainly consisted of three types of IMCs, Fe-rich β-FeAl phases, and Al-rich θ-Fe4Al13 + η-Fe2Al5 phases. With the addition of a HEA interlayer, owing to the sluggish diffusion effect in the fusion zone (FZ), the diffusion of Fe atoms from FZ to the IMCs layer was significantly controlled, which limited the generation of IMCs at the FZ/Al alloy interface. The IMCs layer was only composed of single-phase β-FeAl with the absence of highly brittle Al-rich IMCs and the thickness of IMCs layer was reduced from 85 μm to 30 μm, resulting in the enhancement of toughness of the joint. Additionally, the improvement of mechanical properties of the joint, including microhardness and tensile shear strength was consistence with the reduction of brittleness of IMCs at the interface.http://www.sciencedirect.com/science/article/pii/S2238785422011024Aluminum alloyStainless steelHigh-entropy alloy interlayerLaser processingMicrostructures |
| spellingShingle | He Zhou Xiaopeng Gu Xiaoyan Gu Juan Dong Guocheng Xu Improvement in microstructure and mechanical properties of laser welded steel/aluminum alloy lap joints using high-entropy alloy interlayer Journal of Materials Research and Technology Aluminum alloy Stainless steel High-entropy alloy interlayer Laser processing Microstructures |
| title | Improvement in microstructure and mechanical properties of laser welded steel/aluminum alloy lap joints using high-entropy alloy interlayer |
| title_full | Improvement in microstructure and mechanical properties of laser welded steel/aluminum alloy lap joints using high-entropy alloy interlayer |
| title_fullStr | Improvement in microstructure and mechanical properties of laser welded steel/aluminum alloy lap joints using high-entropy alloy interlayer |
| title_full_unstemmed | Improvement in microstructure and mechanical properties of laser welded steel/aluminum alloy lap joints using high-entropy alloy interlayer |
| title_short | Improvement in microstructure and mechanical properties of laser welded steel/aluminum alloy lap joints using high-entropy alloy interlayer |
| title_sort | improvement in microstructure and mechanical properties of laser welded steel aluminum alloy lap joints using high entropy alloy interlayer |
| topic | Aluminum alloy Stainless steel High-entropy alloy interlayer Laser processing Microstructures |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422011024 |
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