Role of insert material on process loads during FSW

Role of insert material on process loads during FSW In FSW, insert materials are often used to both control the loading conditions as well as to trace the nature of materials flow. This current study aims at understanding the role played by inserts materials by using two different materials, copper and tin as inserts. The copper and tin have higher and lower melting points respectively as compared to aluminum. The metal strips are sandwiched between aluminum plates and friction stir welded at two different rotational speeds. The process loads and torque were recorded during the welding and compared with that obtained for normal butt-welding of aluminum sheets. In the case of copper insert, copper gets distributed in the matrix and it is possible to trace the flow of copper inside the aluminum. In the case of tin, it melts during the welding. The molten tin is squeezed out of faying surface and coats tool shoulder. This lowers the friction and which in turn lowers the torque (55%) and the consequent heat generation. The resultant reduction of temperature in the weld leads to higher tangential and normal loads. Compared to the case without insert, the normal loads for FSW processing with tin insert were higher by 2.2 times and tangential loads were higher by 5.5 times. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The International Journal of Advanced Manufacturing Technology Springer Journals

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Publisher
Springer London
Copyright
Copyright © 2017 by Springer-Verlag London
Subject
Engineering; Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design
ISSN
0268-3768
eISSN
1433-3015
D.O.I.
10.1007/s00170-016-9974-5
Publisher site
See Article on Publisher Site

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