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Mechanical Characteristics and Microstructure on Friction Stir Welded Joints with 6061-T6 Aluminium Alloy

알루미늄합금 6061-T6의 마찰교반용접 조건에 따른 기계적특성 및 용접부 조직평가

  • 장석기 (목포해양대학교 기관시스템공학부) ;
  • 박종식 (목포해양대학교)
  • Published : 2009.07.01

Abstract

This paper shows mechanical properties and behaviors of macro- and micro-structures on friction stir welded specimen with 6061-T6 aluminum alloy plate. It apparently results in defect-free weld zone jointed at welding conditions like the traverse speed of 267mm/min, tool rotation speed of 2500rpm, pin inserted depth of 4.5mm and tilting angle of $2^{\circ}$ with tool dimensions such as tool pin diameter of 5mm, shoulder diameter of 15mm and pin length of 4.5mm. The tensile stress ${\sigma}_T=228MPa$ and the yield point ${\sigma}Y=141MPa$ are obtained at the condition of traverse speed of 267mm/min and tool rotation speed of 2500rpm. With the constant rotation speed, the higher traverse speed become, the higher tensile stress and yielding point become. Vickers hardness for welding zone profile were also presented.

Keywords

Friction Stir Welding(FSW);Heat Affected Zone(HAZ);Thermo-Mechanically Affected Zone(TMAZ);Traverse Speed;Rotating Speed

References

  1. Prado, R.A., Mur, L.E., Soto, K.F. and McClure, J.C., 2003, 'Self-Optimization in Tool Wear for Friction-Stir Welding of Al6061+20% $Al_2O_3$ MMC,' Materials Science and Engineering A349, pp. 156-165 https://doi.org/10.1016/S0921-5093(02)00750-5
  2. Hassan, Kh. A.A., Norman, A.F., Price, D.A. and Prangnell, P.B., 2003, 'Stability of Nugget Zone Grain Structures in High Strength Al Alloy Friction Stir Welds During Soltion Treatment,' Acta Materialia 51, pp. 1923-1936 https://doi.org/10.1016/S1359-6454(02)00598-0
  3. SHIGEMATSU, I., KWON, Y.-J., SUZUKI, K., IMAI, T. and SAITO, 2003, 'Joining of 5083 and 6061 Aluminum Alloys by Friction Stir Welding,' Journal of Materlals Science Letters 22, Vol. 353-356 https://doi.org/10.1023/A:1022688908885
  4. H. T. Kim, S. H. Hwang, S. W. Nam, 1994, 'Weld Cracking of High Strength Al-Zn-Mg Alloy Weldment,' Journal of KWS, Vol. 12, No. 1, Mar
  5. Won-Bae Lee, Sang-Won Kim, Chang-Young Lee, Yun-Mo Yeon, 2004, 'Effects of Welding Parameters on the Friction Stir Weldability of 5052 Al Alloy,' Journal of KWS, Vol. 22, No. 3, June
  6. 熊谷正樹, 田中直, 1999, 溶接學會全國大會槪, 65 要第集, p. 554
  7. Mononen J., et al., 2001, 'Cost Comparison of FSW and MIG Welded Aluminum Panels,' Proceedings of the 3rd Friction Stir welding Symposium, Kobe, 27-28 Sept
  8. Seok-Ki Jang, Don-Chool Lee, Seong-Jong Kim and Jeong-il Jeon, 2005, 'Micro-Structures in Friction Stir Welded Al 7075-T651 Alloy,' Proceedings of the KOSME First Conference, pp. 331-338
  9. Seong-Jong Kim, Jong-Seek Park, Min-Su Han and Seok-Ki Jang, 2007, 'Evaluating of Mechanical Properties in Friction Stir Welding for New Material Al Alloy,' Proceedings of the KOSME First Conference, pp. 39-40
  10. Seok-Ki Jang et al., 2007, 'Effects of Tool Rotation and Transition Speed During Friction Stir WElding of Al7075-T651 Alloy,' Transactions of KSME, Vol. 31, No. 4, pp. 532-539 https://doi.org/10.3795/KSME-A.2007.31.4.532
  11. Seong-Jong Kim, Seok-Ki Jang and Min-Su Han, 2007, 'Evaluation of Mechanical Characteristic of Al Alloy for Ship's Welded with Various Welding Techniques,' J of the Korean Society of Marine Environment & Safety, Vol. 13, No. 3, pp. 223-228
  12. Lim, S.G., et al, 2003, 'Micro-Structural Evolution and Tensile Behavior of Stir Friction Welded Al Alloys,' J. Kor. Inst.Met.&Mater, Vol. 41, No. 11, pp. 743-749
  13. Threadgill, P., 1997, 'Friction Stir Welds in Aluminum Alloys-Preliminary Micro-structural Assessment,' TWI Bulletin, Mar/April
  14. Somasekharan, A.C. and Murr, L.E., 2004, 'Microstructures in Friction-Stir Welded Dissimilar Magnesium Alloys and Magnesium Alloys to 6061-T6 Aluminum Alloy,' Materials Characterization 52, Vol. 49-64 https://doi.org/10.1016/j.matchar.2004.03.005
  15. Byoung-Hyun Yoon, Heung-Ju Kim, Woong-Seong Chang, and Young-Gak Kweon, 2006, 'Corrosion Behavior of Arc Weld and Friction Stir Weld in Al 6061-T6 Alloys,' Corrosion Science and Technology, Vol. 5, No. 6, pp. 196-200
  16. Seok-Ki Jang et al., 2007, 'Weldability and Properties Of Lap Joints By Pin FSW with Al 1050 Al Sheet,' Journal of KSME, Vol. 31, No. 4, pp. 394-400 https://doi.org/10.5916/jkosme.2007.31.4.394
  17. Seok-ki Jang and Jong-seek Park, 2009, 'Mechanical Characteristics and Macro- and Micro-structures on Friction Stir Welded Joints with 5083O Al Alloys,' Journal of the Korean Society of Marine Engineering, Vol. 33, No. 1, pp. 51-58 https://doi.org/10.5916/jkosme.2009.33.1.104
  18. Won-Bae Lee, Yun-Mo Yeon, Seung-Boo Jung, 2003, 'The Joint Properties of Dissimilar Formed Al Alloys by Friction Stir Welding According to the Fixed Location of Materials,' Scripta Materialia 49, Vol. 423-428 https://doi.org/10.1016/S1359-6462(03)00301-4
  19. Seok-Ki Jang, Jeong-il Jeon, 2005, 'Experimental Behaviors of Weld Zone Property of the Butt and Lap Jointed Specimen Friction-Stir-Welded with 2mm Thickness 1050 Aluminum Alloy Sheet,' Transactions of KSME, Vol. 30, No. 2, pp. 187-193 https://doi.org/10.3795/KSME-A.2006.30.2.187