Parametric study of FSSW of aluminium alloy 5754 using a pinless tool

详细信息    查看全文

• 作者：D. Klob?ar ; J. Tu?ek ; A. Smolej ; S. Simon?i?
• 关键词：Friction stir spot welding ; Force ; Measurement ; Tensile tests
• 刊名：Welding in the World
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：59
• 期：2
• 页码：269-281
• 全文大小：10,484 KB
• 参考文献：1. Simon?i? S, Podr?aj P (2012) Image-based electrode tip displacement in resistance spot welding. Meas Sci Technol 23(6):1-. doi:10.1088/0957-0233/23/6/065401
  2. Bhadeshia HKDH, DebRoy T (2009) Critical assessment: friction stir welding of steels. Sci Technol Weld Join 14(3):193-96. doi:10.1179/136217109x421300 CrossRef
  3. Podr?aj P, Polajnar I, Diaci J, Kari? Z (2008) Overview of resistance spot welding control. Sci Technol Weld Join 13(3):215-24. doi:10.1179/174329308x283893 CrossRef
  4. Podr?aj P, Polajnar I, Diaci J, Kari? Z (2004) Expulsion detection system for resistance spot welding based on a neural network. Meas Sci Technol 15(3):592 CrossRef
  5. Podr?aj P, Polajnar I, Diaci J, Kari? Z (2005) Estimating the strength of resistance spot welds based on sonic emission. Sci Technol Weld Join 10(4):399-05 CrossRef
  6. Podr?aj P, Polajnar I, Diaci J, Kari? Z (2006) Influence of welding current shape on expulsion and weld strength of resistance spot welds. Sci Technol Weld Join 11(3):250-54 CrossRef
  7. Karpe B, Nagode A, Kosec B, Stoi? A, Dolenc M, Bizjak M (2013) Microstructure evolution and thermal stability of rapidly solidified Al-Ni-Co-Re alloy. Metalurgija (Sisak) 52(3):305-08
  8. DebRoy T, Bhadeshia HKDH (2010) Friction stir welding of dissimilar alloys—a perspective. Sci Technol Weld Join 15(4):266-70. doi:10.1179/174329310x12726496072400 CrossRef
  9. Robson PPJ Metallurgical challenges in joining lightweight dissimilar materials
  10. Feng Z, Santella ML, David SA, Steel RJ, Packer SM, Pan T, Kuo M, Bhatnagar RS (2005-01-1248) Friction stir spot welding of advanced high-strength steels—a feasibility study
  11. Nagode A, Klan?nik G, Schwarczova H, Kosec B, Goji? M, Kosec L (2012) Analyses of defects on the surface of hot plates for an electric stove. Eng Fail Anal 23:82-9. doi:10.1016/j.engfailanal.2012.03.001 CrossRef
  12. Thornton P, Krause A, Davies R (1996) Aluminum spot weld. Weld J Incl Weld Res Suppl 75(3):101s
  13. Wang P, Chisholm S, Banas G, Lawrence F Jr (1995) The role of failure mode, resistance spot weld and adhesive on the fatigue behavior of weld-bonded aluminum. Weld J Incl Weld Res Suppl 74(2):41s
  14. Bakavos D, Prangnell PB (2009) Effect of reduced or zero pin length and anvil insulation on friction stir spot welding thin gauge 6111 automotive sheet. Sci Technol Weld Join 14(5):443-56. doi:10.1179/136217109x427494 CrossRef
  15. Pan T-Y Friction stir spot welding (FSSW)—a literature review. In: SAE International, 2007. doi:10.4271/2007-01-1702
  16. Bakavos D, Prangnell PB (2010) Mechanisms of joint and microstructure formation in high power ultrasonic spot welding 6111 aluminium automotive sheet. Mater Sci Eng A 527(23):6320-334. doi:10.1016/j.msea.2010.06.038 CrossRef
  17. Balle F, Wagner G, Eifler D (2007) Ultrasonic spot welding of aluminum sheet/carbon fiber reinforced polymer—joints. Mater Werkst 38(11):934-38. doi:10.1002/mawe.200700212 CrossRef
  18. Jahn R, Cooper R, Wilkosz D (2007) The effect of anvil geometry and welding energy on microstructures in ultrasonic spot welds of AA6111-T4. Metall and Mater Trans A 38(3):570-83. doi:10.1007/s11661-006-9087-0 CrossRef
  19. Panteli A, Chen YC, St
• 刊物主题：Metallic Materials; Continuum Mechanics and Mechanics of Materials; Theoretical and Applied Mechanics;
• 出版者：Springer Berlin Heidelberg
• ISSN：1878-6669

文摘

A parametric study of friction stir spot welding (FSSW) of lap joints in aluminium alloy 5754 using a pinless tool with scrolled shoulder is presented. Experimental plan was done according to the response surface methodology (RSM), where tool rotation speed varied between 988 and 3511?rev/min, plunge rate between 24.4 and 150?mm/min and dwell time between 1 and 3.5?s. The plunge depth was held constant at 0.4?mm. During welding, the axial force and torque were monitored using a dynamometer. The welds were tensile shear tested, and the broken samples were visually examined. The weld bond line and microstructure were analysed using light optic microscope under polarised light, and SEM was used for examination of fractured surface. Mathematical models describing the relationship between welding parameters and joint strength, axial force and torque were developed. FSSW parameters, at which maximal joint strength was obtained, were considered as optimal. At these welding parameters, the axial force and torque were in the lower range among tested parameters. Material flow and joint formation are experimentally presented and schematically illustrated.