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Effect of tool pin profile on microstructure and mechanical properties of AL6063 in Friction stir processing

Textbook 2017 69 Pages

Summary

Friction stir processing (FSP) is a solid state process in which a non consumable stirring (rotating) tool is plunged into a work piece up to half thickness, which causes intense plastic deformation, material mixing, and thermal exposure, resulting in refinement of micro structural properties, enhancement of mechanical properties, and homogeneity of the processed (nugget) zone. The FSP technique has been successfully used for producing fine-grained structure and surface composite, modifying the microstructure of materials, synthesizing composites like metal-metal composites.
The use of FSP generates significant frictional heating and intense plastic deformation, thereby resulting in the occurrence of dynamic recrystallization in the stirred zone (SZ). Although there is still a controversy about the grain-refinement mechanism in the SZ, it is generally believed that the grain refinement is due to dynamic recrystallization. Therefore, the factors influencing the nucleation and growth of the dynamic recrystallization will determine the resultant grain microstructure in the SZ. It has been demonstrated that the FSP parameters, tool geometry, material chemistry, workpiece temperature, vertical pressure, and active cooling exert a significant effect on the size of the recrystallized grains in the SZ.

Details

Pages
69
Type of Edition
Erstausgabe
Year
2017
ISBN (eBook)
9783960677055
ISBN (Book)
9783960672050
File size
7.2 MB
Language
English
Institution / College
Punjabi University
Publication date
2017 (November)
Grade
70
Tags
Solid-state reaction route Metal matrix composite metal-metal composites Stirred zone Frictional heating Plastic deformation Dynamic recrystallization Grain-refinement Grain microstructure Microstructural zone

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Title: Effect of tool pin profile on microstructure and mechanical properties of AL6063 in Friction stir processing