EBSD study of underwater friction stir welded AA7003-T4 and AA6060-T4 dissimilar joint
| Autor: | Xicai Luo, Jialiang Dong, Wen Zhang, Datong Zhang, Cheng Qiu, Weiwen Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Equiaxed crystals
lcsh:TN1-997 Heat-affected zone Materials science 02 engineering and technology Welding 01 natural sciences law.invention Biomaterials law 0103 physical sciences Friction stir welding Underwater dissimilar friction stir weld Composite material Microstructure lcsh:Mining engineering. Metallurgy 010302 applied physics Texture evolution Metals and Alloys Recrystallization (metallurgy) 021001 nanoscience & nanotechnology Grain size Surfaces Coatings and Films Electron backscatter diffraction Ceramics and Composites Grain boundary 0210 nano-technology |
| Zdroj: | Journal of Materials Research and Technology, Vol 9, Iss 3, Pp 4309-4318 (2020) |
| ISSN: | 2238-7854 |
| Popis: | Microstructural changes and texture evolution during underwater friction stir welding of dissimilar 7003/6060 aluminum alloys were investigated via electron backscatter diffraction technique. In the stir zone, equiaxed fine grains were formed through continuous dynamic recrystallization. Due to the enhanced cooling rate, the average grain size of the stir zone was much finer than that of normal friction stir welds. In the heat affected zone, static recovery was the main mechanism for microstructure evolution, resulting in similar grain structure as compared with base materials, while the fraction of low angle grain boundary increased. In the thermo-mechanical affected zone, dynamic recovery and partial crystallization took place on the advancing side of 7003, and a mixed grain structure was formed; dynamic recovery was the dominant evolution mechanism on the retreating side of 6060, and the fraction of low angle grain boundary was increased. The texture in the heat affected zone was almost the same as the base material, and simple shear texture B/ B - {112} was formed in the stir zone. With the distance to the weld center decreasing, the texture density of relevant zone decreased. |
| Databáze: | OpenAIRE |
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