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http://dx.doi.org/10.5695/JKISE.2013.46.1.036

Characteristics of Friction Stir Welded AZ31 Mg Alloys with Shoulder Diameter and Rotating Speed  

Jun, Sang-Hyuk (Dept. of Materials Science and Metallurgy, Kyungpook National University)
Ko, Young-Bong (Korea Testing & Research Institute (KTR))
Park, Kyeung-Chae (Dept. of Materials Science and Metallurgy, Kyungpook National University)
Publication Information
Journal of the Korean institute of surface engineering / v.46, no.1, 2013 , pp. 36-41 More about this Journal
Abstract
Friction stir welding (FSW) is a relatively new joining technique particularly for magnesium and aluminum alloys that are difficult to fusion weld. In this study, AZ31 Mg alloys were joined by FSW with shoulder diameter 11, 19 mm and rotating speed 900, 1200, 1500, 1800 rpm. The shoulder diameter and welding speed depended on the heat input during FSW process. As a result, the microstructures of stir zone were a fine grain by dynamic recrystallization. According to the larger shoulder diameter and the higher rotating speed, refined grain sizes of stir zone were grown by higher heat input, and the microhardness of stir zone was lower. The tensile strength at the shoulder diameter 19 mm, rotating speed 900 rpm was obtained maximum value. This value compared with the base metal was over 93%.
Keywords
Friction Stir Welding (FSW); Shoulder diameter; Rotating speed; Heat input;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Richard Johnson, 4th FSW Symposium (2003).
2 Michael M. Avedesian, ASM Specialty Handbook (1999) 12.
3 W. M. Thomas, International Patent Application No. PCT/GB92 Patent Application No. 9125978.8 (1991).
4 O. Frigaard, 1st FSW Symposium (1999).
5 Y.-B. Ko, J. Kor. Inst. Surf. Eng., 42 (2009) 294.   DOI   ScienceOn
6 Y.-B. Ko, Journal of KWJS, 27 (2009) 595.
7 Z. W. Chen, Materials Science and Engineering A, 474 (2008) 312.   DOI   ScienceOn
8 Y.-B. Ko, Journal of KWJS, 28 (2010) 34.
9 Y.-B. Ko, J. Kor. Inst. Surf. Eng., 45 (2012) 181.   DOI   ScienceOn
10 L. Cederqvist, The Welding Journal Research Supplement, 80 (2001) 281.