Wear characteristics of a WC–Co tool in friction stir welding of AC4A+30 vol%SiCp composite

Tool wear is a key issue for the friction stir welding (FSW) of aluminum matrix composites (AMCs), especially when the volume fraction of reinforcing particulates is relatively high. In this study, a threaded tool of WC–Co hard alloy is used to weld a cast AMC composed of Al–Si matrix and 30 vol%SiC...

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Bibliographic Details
Published in:International journal of machine tools & manufacture 2005-11, Vol.45 (14), p.1635-1639
Main Authors: Liu, H.J., Feng, J.C., Fujii, H., Nogi, K.
Format: Article
Language:English
Subjects:
Aluminum matrix composite
Applied sciences
Exact sciences and technology
Friction stir welding
Hard alloy tool
Mechanical engineering. Machine design
Metals. Metallurgy
Wear characteristics
Welding parameters
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Summary:Tool wear is a key issue for the friction stir welding (FSW) of aluminum matrix composites (AMCs), especially when the volume fraction of reinforcing particulates is relatively high. In this study, a threaded tool of WC–Co hard alloy is used to weld a cast AMC composed of Al–Si matrix and 30 vol%SiC particulates so as to examine the wear characteristics of the tool. Experimental results indicate that the tool wear is appreciable although the shoulder size and pin length are changed slightly. The radial wear of the pin is very different at different locations of the pin, and the maximum wear is finally produced at a location of about one-third pin length from the pin root. The welding speed has a decisive effect on radial wear rate of the pin, and the maximum wear rate is produced in the initial welding.
ISSN:0890-6955
1879-2170
DOI:10.1016/j.ijmachtools.2004.11.026