Microstructural and mechanical properties of ultrasonically assisted titanium-steel dissimilar metal fusion welds
The formation of titanium-iron compounds during the fusion welding of titanium steels continues to pose a significant challenge. In this paper, pure copper filler wire was employed in TIG welding to join TC4 titanium alloy and 304 stainless steel. The solidification behavior of the titanium-steel mo...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425001048 |
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| author | Xiaohu Hao Xinlong Wei Shuhua Li Zeqin Cui Dejun Yan Weiguo Li |
| author_facet | Xiaohu Hao Xinlong Wei Shuhua Li Zeqin Cui Dejun Yan Weiguo Li |
| author_sort | Xiaohu Hao |
| collection | DOAJ |
| description | The formation of titanium-iron compounds during the fusion welding of titanium steels continues to pose a significant challenge. In this paper, pure copper filler wire was employed in TIG welding to join TC4 titanium alloy and 304 stainless steel. The solidification behavior of the titanium-steel molten weld interface and the morphological distribution of the brittle phase were controlled by introducing a low-power ultrasonic energy field to assist the welding process. Results indicated that the low-power ultrasonic energy field enhanced the diffusion of joint elements, leading to biased aggregation of brittle phases on the titanium and steel sides, thereby reducing the joint's mechanical properties. The high-frequency vibration produced by the increased ultrasonic power resulted in a slower diffusion of the concentration gradient, creating a more homogeneous distribution of the Ti–Fe brittle phase in the Cu interlayer. This improved the joint properties and results in the middle of the weld consisting mainly of a discontinuous Ti–Fe phases. Additionally, the distribution of the Ti–Cu phase and α-(Fe,Cr) phase became more uniform. The high-frequency vibration effectively reduced the residual stresses in the titanium-steel joints, thereby enhancing the overall performance. The tensile strength of the joints reached up to 346 MPa, an increase of 12.7% compared to before ultrasonic vibration was added. |
| format | Article |
| id | doaj-art-3913ac02a303456c925b4951a339a966 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-3913ac02a303456c925b4951a339a9662025-01-22T05:42:36ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013514001408Microstructural and mechanical properties of ultrasonically assisted titanium-steel dissimilar metal fusion weldsXiaohu Hao0Xinlong Wei1Shuhua Li2Zeqin Cui3Dejun Yan4Weiguo Li5College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China; Guangdong Provincial Key Laboratory of Advanced Welding Technology for Ships, CSSC Huangpu Wenchong Shipbuilding Company Limited, Guangzhou, 510715, China; Corresponding author. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, ChinaGuangdong Provincial Key Laboratory of Advanced Welding Technology for Ships, CSSC Huangpu Wenchong Shipbuilding Company Limited, Guangzhou, 510715, ChinaCollege of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, ChinaGuangdong Provincial Key Laboratory of Advanced Welding Technology for Ships, Foshan University, Foshan, 528051, China; Corresponding author.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, ChinaThe formation of titanium-iron compounds during the fusion welding of titanium steels continues to pose a significant challenge. In this paper, pure copper filler wire was employed in TIG welding to join TC4 titanium alloy and 304 stainless steel. The solidification behavior of the titanium-steel molten weld interface and the morphological distribution of the brittle phase were controlled by introducing a low-power ultrasonic energy field to assist the welding process. Results indicated that the low-power ultrasonic energy field enhanced the diffusion of joint elements, leading to biased aggregation of brittle phases on the titanium and steel sides, thereby reducing the joint's mechanical properties. The high-frequency vibration produced by the increased ultrasonic power resulted in a slower diffusion of the concentration gradient, creating a more homogeneous distribution of the Ti–Fe brittle phase in the Cu interlayer. This improved the joint properties and results in the middle of the weld consisting mainly of a discontinuous Ti–Fe phases. Additionally, the distribution of the Ti–Cu phase and α-(Fe,Cr) phase became more uniform. The high-frequency vibration effectively reduced the residual stresses in the titanium-steel joints, thereby enhancing the overall performance. The tensile strength of the joints reached up to 346 MPa, an increase of 12.7% compared to before ultrasonic vibration was added.http://www.sciencedirect.com/science/article/pii/S2238785425001048TitaniumSteelUltrasonically assistedFusion weldingDiffusion mechanisms |
| spellingShingle | Xiaohu Hao Xinlong Wei Shuhua Li Zeqin Cui Dejun Yan Weiguo Li Microstructural and mechanical properties of ultrasonically assisted titanium-steel dissimilar metal fusion welds Journal of Materials Research and Technology Titanium Steel Ultrasonically assisted Fusion welding Diffusion mechanisms |
| title | Microstructural and mechanical properties of ultrasonically assisted titanium-steel dissimilar metal fusion welds |
| title_full | Microstructural and mechanical properties of ultrasonically assisted titanium-steel dissimilar metal fusion welds |
| title_fullStr | Microstructural and mechanical properties of ultrasonically assisted titanium-steel dissimilar metal fusion welds |
| title_full_unstemmed | Microstructural and mechanical properties of ultrasonically assisted titanium-steel dissimilar metal fusion welds |
| title_short | Microstructural and mechanical properties of ultrasonically assisted titanium-steel dissimilar metal fusion welds |
| title_sort | microstructural and mechanical properties of ultrasonically assisted titanium steel dissimilar metal fusion welds |
| topic | Titanium Steel Ultrasonically assisted Fusion welding Diffusion mechanisms |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425001048 |
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