Ultrasonic vibration assisted tungsten inert gas welding of dissimilar metals 316L and L415
| Autor: | Liang Wang, Sen-feng Zhang, Bin Wang, Xiu-fang Gong, Li-ping Nie, Hongxia Lan |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Alloy 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology Welding engineering.material Tungsten law.invention Geochemistry and Petrology law Ferrite (iron) Ultimate tensile strength Materials Chemistry Composite material Inert gas 021102 mining & metallurgy Mechanical Engineering Gas tungsten arc welding Metals and Alloys 021001 nanoscience & nanotechnology Microstructure chemistry Mechanics of Materials engineering 0210 nano-technology |
| Zdroj: | International Journal of Minerals, Metallurgy and Materials. 27:943-953 |
| ISSN: | 1869-103X 1674-4799 |
| DOI: | 10.1007/s12613-019-1960-0 |
| Popis: | Ultrasonic vibration assisted tungsten inert gas welding was applied to joining stainless steel 316L and low alloy high strength steel L415. The effect of ultrasonic vibration on the microstructure and mechanical properties of a dissimilar metal welded joint of 316L and L415 was systematically investigated. The microstructures of both heat affected zones of L415 and weld metal were substantially refined, and the clusters of δ ferrite in traditional tungsten inert gas (TIG) weld were changed to a dispersive distribution via the ultrasonic vibration. The ultrasonic vibration promoted the uniform distribution of elements and decreased the micro-segregation tendency in the weld. With the application of ultrasonic vibration, the average tensile strength and elongation of the joint was improved from 613 to 650 MPa and from 16.15% to 31.54%, respectively. The content of Σ3 grain boundaries around the fusion line zone is higher and the distribution is more uniform in the ultrasonic vibration assisted welded joint compared with the traditional one, indicating an excellent weld metal crack resistance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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