Journal
INTERNATIONAL JOURNAL OF MATERIAL FORMING
Volume 14, Issue 4, Pages 623-640Publisher
SPRINGER FRANCE
DOI: 10.1007/s12289-020-01551-2
Keywords
Friction stir processing; FEM; Vibration; Chip morphology; Mechanical properties; Cutting force
Categories
Funding
- Amirkabir University of Technology (AUT)
- Sharif University of Technology
- National Elites Foundation of Iran
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The research investigated the effect of friction stir processing (FSP) and vibration on AZ91 alloy machining behavior, showing that vibration applied during FSP can improve microstructure and mechanical properties. The study recommended the use of friction stir vibration process for enhancing mechanical and machining properties in different industries.
The objective of the research is to determine the effect of friction stir processing (FSP) parameters and vibration on the machining behavior of AZ91 alloy. The article displays the state of the art of AZ91 alloy machinability including chip formation, chip morphology, and cutting forces. In this method, the vibration was applied to the process line through the fixture under the workpiece during the FSP. The three-dimensional finite element (FE) modeling was applied for simulating the small-hole drilling process of AZ91 alloy. The large deformation of work and the chip formation in drilling process is realized by incorporating Johnson-Cook material constitutive model and material failure criterion. It was concluded that the microstructure from 150 (mu m) for base metal was modified to 28 (mu m) and 16 (mu m) for FSP and FSVP samples, respectively. It has been indicated that mechanical properties increase as vibration applied during the FSP. The vibration improves adiabatic shearing and thus leads to more discontinuous chips. To enhance the mechanical and machining properties of processed zone the friction stir vibration process as an easy to apply FSP method is recommended for different industries.
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