Solid state friction stir welding (FSW) on similar and dissimilar metals
Welding is a process which helps to join metals by adding metals between weldments by diffusion process.. One of the process by which metals are joined by creating friction on metals. It is called solid state welding. A rotating hard cylindrical pin is pressed on metals to be welded by friction. In...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/5662/ http://eprints.uthm.edu.my/5662/1/WCE2013_pp1743%2D1748.pdf |
| Summary: | Welding is a process which helps to join metals by
adding metals between weldments by diffusion process.. One of
the process by which metals are joined by creating friction on
metals. It is called solid state welding. A rotating hard
cylindrical pin is pressed on metals to be welded by friction. In
FSW, there are only three process variables to control:
rotation speed, travel speed and pressure, all of which are
easily controllable. Four rotational speeds were used keeping
the feed rate constant. The plunge depth is related directly to
the pressure was varied depend on the work material. Analysis
was carried by measuring surface roughness (RA), tensile,
micro hardness and metallographic tests. At rotational speed of
1925 RPM, aluminum to aluminum welding had given ultimate
tensile strength up to 86 percent. Copper to copper joint
process resulted that at rotational speed of 2275 RPM is the
best result. Tensile value of 74 % was obtained compared to
copper base material. The surface roughness Ra value low
compared to copper base metal. The Vickers hardness value
was high compared to base metal. Aluminum to copper metal
joint the best resulted at 2275 RPM. The result was the lowest
compared to similar metal joints. The value of 427 MPa of
ultimate tensile strength (UTS) was archived. The
metallographic test showed that a crack occurred at the
bottom of welding joint. The hardness test showed that the
hardness at the joint increased drastically. At high rotational
speed of 2975, low surface roughness was obtained in all the
weldments at low feed rate and low plunge depth. |
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