**Acknowledgements**

*Mass Production Processes*

**4. Conclusions**

ments of FSW of aluminum alloys:

nomical methods

and recast

effectively

ity and welding performance.

other light-weight materials

zone and better tensile properties on weldment.

stated that cylindrical tool pin profile was beneficial for obtaining defect free stir

that friction stir welding is best alternative to join almost all types of aluminum alloys. The uses of FSW can also be extended to weld dissimilar aluminum alloys and with other materials also. FSW can be used as mass production technology or fabrication process, as it does not have melting phase, no special preparation of welding joint, minimum problems related to welding metal re-solidification, uses non-consumable tool, etc. Performing FSW process to create aluminum sheets in economical manner is important area of work and it is highly depends on the proper understanding of principles of FSW, relations between the process parametric conditions and response characteristics, properties of work-piece material and welding tool, shape and geometry of welding tool, etc. More research investigations related to various aspects of FSW of similar aluminum (AL) alloys and dissimilar AL alloys and or with other materials will create a sound knowledge bank; from which industrial persons can be benefitted to conduct FSW process with enhanced efficiency. Present chapter is one step forward for making the FSW of similar and

dissimilar aluminum alloys in an economical and predictive manner.

make products in many advanced industrial applications

2.Aluminum alloys are treated as un-weldable materials

6.Welding defects can be eliminated with FSW process

9.FSW can be used weld similar and dissimilar aluminum alloys

The followings are the conclusions drawn from the present study of advance-

1.Aluminum alloys are useful alternative materials of steel, and those are used

3.Welding of aluminum alloys with fusion welding (tungsten inert gas, and metal inert gas) and resistance welding techniques are difficult and not eco-

rotating tool to weld aluminum alloys by using frictional energy

4.Friction stir welding (FSW) is solid state welding which used non-consumable

5.FSW does not need to weld joint preparation, melting of material to be joined

7.Fundamental understanding of FSW is required to conduct it efficiently and

8.Selection correct process welding parameters, temperature distribution during welding, are important parameters which expected to influence the weld qual-

10.FSW can also be used to join aluminum alloys with high strength steels and

From the extensive review of friction stir welding of aluminum alloys, it is stated

**14**

The author acknowledges to Dr. Asish Bandyopadhyay, Professor, Mechanical Engineering Department, Jadavpur University, India, for encouraging me to write this chapter.
