Effect of nickel interlayer on laser welding of copper/titanium dissimilar metal joint
Cu/Ti dissimilar metal welding components have significant potential applications in aerospace, nuclear industries, and other fields. To achieve a robust connection between titanium (TA2) and copper (T2), this study conducted laser-welding experiments using nickel as an intermediate layer. The influ...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423026534 |
| _version_ | 1797301521255235584 |
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| author | Yuhang Xie Jiankang Huang Jianhui Su Yiming Luo Hao Du Ding Fan |
| author_facet | Yuhang Xie Jiankang Huang Jianhui Su Yiming Luo Hao Du Ding Fan |
| author_sort | Yuhang Xie |
| collection | DOAJ |
| description | Cu/Ti dissimilar metal welding components have significant potential applications in aerospace, nuclear industries, and other fields. To achieve a robust connection between titanium (TA2) and copper (T2), this study conducted laser-welding experiments using nickel as an intermediate layer. The influence of a nickel intermediate layer on the joint formation, microstructure, mechanical properties, melting, and element diffusion behavior were investigated. The results revealed that without the addition of a nickel intermediate layer, when the laser beam was biased toward the titanium side during welding, a 17 μm thick layer of intermetallic compounds formed in the copper-side weld region. In this area, a notable concentration of fragile Ti–Cu intermetallic compounds forms, rendering it the weakest point in the joint. As a consequence, the ultimate tensile strength of the joint measures at 131 MPa, which is roughly 55 % of the tensile strength of the copper base material. The introduction of a nickel intermediate layer led to a change in the microstructure of the fusion zone, with Cu–Ti intermetallic compounds dispersed within, preventing the formation of brittle Ti–Cu phases at the copper interface. The addition of the nickel interlayer increased the tensile strength of the TA2-T2 joint to 224 MPa, which is approximately 94 % that of the copper parent material, and the joint exhibited ductile fracture behavior in the copper parent material's heat-affected zone. |
| first_indexed | 2024-03-07T23:22:49Z |
| format | Article |
| id | doaj.art-62f4933df4d8478b825455333ff1e2e8 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:22:49Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-62f4933df4d8478b825455333ff1e2e82024-02-21T05:26:48ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012744164429Effect of nickel interlayer on laser welding of copper/titanium dissimilar metal jointYuhang Xie0Jiankang Huang1Jianhui Su2Yiming Luo3Hao Du4Ding Fan5State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou, 730050, China; School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou, 730050, China; Corresponding author.State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou, 730050, China; School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou, 730050, China; School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, ChinaSchool of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; Corresponding author.Cu/Ti dissimilar metal welding components have significant potential applications in aerospace, nuclear industries, and other fields. To achieve a robust connection between titanium (TA2) and copper (T2), this study conducted laser-welding experiments using nickel as an intermediate layer. The influence of a nickel intermediate layer on the joint formation, microstructure, mechanical properties, melting, and element diffusion behavior were investigated. The results revealed that without the addition of a nickel intermediate layer, when the laser beam was biased toward the titanium side during welding, a 17 μm thick layer of intermetallic compounds formed in the copper-side weld region. In this area, a notable concentration of fragile Ti–Cu intermetallic compounds forms, rendering it the weakest point in the joint. As a consequence, the ultimate tensile strength of the joint measures at 131 MPa, which is roughly 55 % of the tensile strength of the copper base material. The introduction of a nickel intermediate layer led to a change in the microstructure of the fusion zone, with Cu–Ti intermetallic compounds dispersed within, preventing the formation of brittle Ti–Cu phases at the copper interface. The addition of the nickel interlayer increased the tensile strength of the TA2-T2 joint to 224 MPa, which is approximately 94 % that of the copper parent material, and the joint exhibited ductile fracture behavior in the copper parent material's heat-affected zone.http://www.sciencedirect.com/science/article/pii/S2238785423026534TA2CopperLaser weldingNickel interlayerMicrostructureMechanical properties |
| spellingShingle | Yuhang Xie Jiankang Huang Jianhui Su Yiming Luo Hao Du Ding Fan Effect of nickel interlayer on laser welding of copper/titanium dissimilar metal joint Journal of Materials Research and Technology TA2 Copper Laser welding Nickel interlayer Microstructure Mechanical properties |
| title | Effect of nickel interlayer on laser welding of copper/titanium dissimilar metal joint |
| title_full | Effect of nickel interlayer on laser welding of copper/titanium dissimilar metal joint |
| title_fullStr | Effect of nickel interlayer on laser welding of copper/titanium dissimilar metal joint |
| title_full_unstemmed | Effect of nickel interlayer on laser welding of copper/titanium dissimilar metal joint |
| title_short | Effect of nickel interlayer on laser welding of copper/titanium dissimilar metal joint |
| title_sort | effect of nickel interlayer on laser welding of copper titanium dissimilar metal joint |
| topic | TA2 Copper Laser welding Nickel interlayer Microstructure Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423026534 |
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