Effect of Process Parameters on Mechanical Properties of Aluminum Composite Foam Developed by Friction Stir Processing

Abstract

The underwater friction stir processing is used for development of aluminum metal matrix composite (AA2219-Y2O3) foam. For development of foam, holes with different diameter in the mid thickness of plate were filled with a mixture of TiH2 and aluminum powder and underwater friction stir processing was used to mix this mixture in aluminum metal matrix composite. Then precursors extracted from the processed zone and heated upto 650°C in a furnace for development of foam. The effect of diameter of hole, number of passes and the tool rotation direction has been studied on the foam cell size and static and dynamic compressive behavior of the foam. It is found that as the diameter of hole increases, the size of pores increases. The distribution of pores is better with higher number of passes and increasing the hole diameter. The quality of foam further improves by reversing the tool rotation direction. The developed foam has different pore size varies from 0.7 to 2.7 mm depends on the FSP parameters. Based on the size of pores and their distribution the relative density ranges from 0.1 to 0.78. The foam produced with 4 mm hole diameter has best static and dynamic compression properties.

Effect of processing parameters and heat treatment techniques on foaming properties of aluminium foam developed by friction stir processing route

“…These factors have been selected on the basis of test experiments and published literature that have the best foaming properties without any defects. 27 During these experiments some factors were kept constant throughout the experimentation and are depicted in Table 4. The foaming agent and stabilizer are mixed by weight% and the mixture is filled tightly to avoid the vacant space in the hole.…”

Effect of tool pin profiles on the properties of foamable precursor developed by friction stir processing

“…[5][6][7][8] Recently, a precursor technique based on friction stir processing (FSP) has been developed. [9][10][11] FSP is a solid-state process that involves inserting a revolving tool with a probe and a shoulder into the substrate. Due to the rotation of the tool probe, material near around it undergoes frictional heating and severe plastic deformation.…”

Microstructural Evolution & Mechanical Properties of ZrO2/GNP and B4C/GNP reinforced AA6061 Friction Stir Processed Surface Composites - A Comparative study

“…Rathore et al 21 investigated (AA2219-Y 2 O 3 ) foam metal matrix composite which was developed by FSP in underwater. The underwater parameters have influenced the process and the fabricated foam has pore sizes ranging from 0.7 to 2.7 mm.…”