Comprehensive investigation into the dissimilar friction stir welding of Al 2024 to St37
| Autor: | Amir Jafari Bolghari, Amir Mostafapour, Amir Chamanara, Hasan Mohammadzadeh Jamalian |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical Engineering Metallurgy Intermetallic Rotational speed 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure Indentation hardness Industrial and Manufacturing Engineering Computer Science Applications law.invention 020901 industrial engineering & automation Brittleness Optical microscope Control and Systems Engineering law Ultimate tensile strength Friction stir welding 0210 nano-technology Software |
| Zdroj: | The International Journal of Advanced Manufacturing Technology. 93:3599-3613 |
| ISSN: | 1433-3015 0268-3768 |
| Popis: | In the present work, feasibility study on dissimilar friction stir welding (FSW) of immiscible materials of St37 and Al 2024 is fully investigated. Towards that end, three tool rotational speeds of 224, 355, and 450 rpm along with three traverse speeds of 20, 25, and 31.5 mm/min were employed to achieve optimum FSW parameters. Besides, effects of process parameters on microhardness and tensile properties of the joints were studied as well. Optical microscopy (OM), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) were also executed to investigate the microstructure and the brittle intermetallic compounds (IMCs) within the stir zone (SZ) which revealed the presence of FeAl3 IMCs within this region. Lowering the rotational speed led to further diminution of IMCs and resulted in superior mechanical properties. Increasing the rotational speed raised the microhardness values of the SZ due to the grains refinement and increase of the IMCs. Additionally, increasing the traverse speed raised the ultimate tensile strength of the joints due to the reduction of IMCs and also the annealing effect of the heat input. The highest ultimate tensile strength of 331.5 MPa was obtained at rotational and traverse speeds of 224 rpm and 31.5 mm/min, respectively. |
| Databáze: | OpenAIRE |
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