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The Effects of Maintaining Temperature in Annealing Heat Treatment for an FSWed 6061-T6 Al Alloy

Published online by Cambridge University Press:  06 August 2013

Seung-Jun Lee ,
Min-Su Han  and
Seong-Jong Kim
Seung-Jun Lee
Affiliation:
Division of Marine System Engineering, Mokpo Maritime University, Haeyangdaehak-ro 91 Mokpo-si, Jeonnam 530-729, Korea
Min-Su Han
Affiliation:
Division of Marine System Engineering, Mokpo Maritime University, Haeyangdaehak-ro 91 Mokpo-si, Jeonnam 530-729, Korea
Seong-Jong Kim*
Affiliation:
Division of Marine System Engineering, Mokpo Maritime University, Haeyangdaehak-ro 91 Mokpo-si, Jeonnam 530-729, Korea
*
*Corresponding author. E-mail: ksj@mmu.ac.kr
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Abstract

The technological development of all kinds of lightweight transportation devices including vehicles, aircraft, ships, etc. has progressed markedly with the demand for energy saving and environmental protection. Aluminum alloy is in the spotlight as it is a suitable environmentally friendly material. However, deformation is a major problem during the welding process because aluminum alloy has a large thermal expansion coefficient. In addition, it is known that its corrosion resistance is excellent; nevertheless, in practice, considerable corrosion is generated and this is a major problem. To solve this problem, the friction stir welding (FSW) technology is applied extensively at various industrial fields as a new welding technique. This method involves a process in which materials are joined by frictional heat and physical force. Therefore, we evaluated improvements in mechanical properties and corrosion resistance through annealing heat treatment after FSW. The electrochemical experiment did not show a significant difference. However, the microstructure observation showed defectless, fine crystal particles, indicating excellent properties at 200–225°C.

Keywords

annealing heat treatmentfriction stir welding (FSW)Al–Mg–Si alloyseawatermicrostructurecorrosion
Type
Research Article
Information
Microscopy and Microanalysis , Volume 19 , Supplement S5: IUMAS , August 2013 , pp. 69 - 72
Copyright
Copyright © Microscopy Society of America 2013 

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References

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