Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 213, Issue 11, Pages 1818-1824Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2013.04.018
Keywords
Friction stir welding; Embedded rod; Tensile strength
Funding
- National Science Council in Taiwan [NSC-100-2221-E-110-038]
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A pinless tool design was proposed to achieve high butt tensile strength in aluminum alloy sheets (similar to 3 mm thick) in friction stir welding (FSW), where a 7 mm long cylindrical insert rod made of aluminum alloy was tightly embedded into a hollow cylindrical tool. The effects of rod diameter (d) on the welding properties and mechanism of weld formation were investigated. For friction stir spot welding (FSSW), the maximum rate of temperature rise was about 12.8 degrees C/s, and the failure load was about 2 kN for this pinless tool (d = 10 mm), with these being about 7.4 degrees C/s and 1.35 kN for the plain one. For FSW, the failure load was about 1.46 kN for this tool, and about 0.72 kN for the plain one. The abutting edges of sheets with a thickness of 3 mm could be welded using this pinless tool. (C) 2013 Published by Elsevier B.V.
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