journal article·2014-04

Failure modes and fatigue behavior of conventional and refilled friction stir spot welds in AA 6061-T6 sheets

S. Venukumar, S. Muthukumaran, Swaroop G. Yalagi, Satish V. Kailas

Publisher page

Abstract

The fatigue behavior of conventional friction stir spot welding (FSSW) and friction stir spot welding refilled by the friction forming process (FSSW-FFP) in aluminum 6061-T6 lap shear specimens, are investigated based on the experimental observations. Optical micrographs of the welds after fatigue failure in both the cases are examined to study the fatigue crack propagation and failure modes. Experimental results indicate that the fatigue strength of the FSSW-FFP weld samples is higher than that of the conventional FSSW samples at all loads. Fracture surfaces are analyzed in detail using the scanning electron microscope. (C) 2013 Elsevier Ltd. All rights reserved.
Source: openaire · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Advanced Welding Techniques Analysis · Aluminum Alloys Composites Properties · Metal Forming Simulation Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

References (25)

Show source-provided references
1. The suitability of aluminium as an alternative material for car bodies10.1016/S0261-3069(99)00003-5 ↗
2. Recent developments in aluminium alloys for the automotive industry10.1016/S0921-5093(99)00653-X ↗
3. Resistance spot welding of 6061-T6 aluminum: failure loads and deformation10.1016/j.matdes.2011.05.017 ↗
4. The aluminum spot weld
5. Static and fatigue behavior of spot-welded 5182-O aluminum alloy sheet
6. Sakano R, Murakami K, Yamashita K, Hyoe T, Fujimoto M, Inuzuka M, et al. Development of spot FSW robot system for automobile body members. In: Proceedings of the 3rd international symposium of friction stir welding, Kobe, Japan, September 27–28, 2001.
7. Iwashita T. Method and apparatus for joining, US Patent 6601751 B2, August 5, 2003.
8. Friction spot joining of an extruded Al–Mg–Si alloy10.1016/j.scriptamat.2006.07.046 ↗
9. Effect of tool geometry on microstructure and static strength in friction stir spot welded aluminium alloys10.1016/j.ijmachtools.2007.07.005 ↗
10. Lap shear strength and fatigue life of friction stir spot welded AZ31magnesium and 5754 aluminum alloys10.1016/j.msea.2012.07.019 ↗
11. Microstructures and failure mechanisms of friction stir spot welds of aluminum 6061-T6 sheets10.1016/j.jmatprotec.2006.12.045 ↗
12. Failure modes and fatigue life estimations of spot friction welds in lap-shear specimens of aluminum 6111-T4 sheets. Part 1: Welds made by a concave tool10.1016/j.ijfatigue.2007.02.016 ↗
13. Failure modes and fatigue life estimations of spot friction welds in lap-shear specimens of aluminum 6111-T4 sheets. Part 2: Welds made by a flat tool10.1016/j.ijfatigue.2007.02.017 ↗
14. A crack growth approach to life prediction of spot-welded lap joints10.1046/j.1460-2695.1998.00099.x ↗
15. A fatigue crack growth model for spot welds in various types of specimens under cyclic loading conditions10.1016/j.ijfatigue.2005.08.003 ↗
16. Fatigue behavior of aluminum 5754-O and 6111T4 spot friction welds in lap-shear specimens10.1016/j.ijfatigue.2008.05.025 ↗
17. Fatigue lives of friction stir spot welds in aluminum 6061-T6 sheets10.1016/j.jmatprotec.2008.02.008 ↗
18. Fatigue behavior of dissimilar spot friction welds in lap-shear and cross-tension specimens of aluminum and steel sheets10.1016/j.ijfatigue.2009.12.011 ↗
19. Fatigue behavior of spot friction welds in lap-shear and cross-tension specimens of dissimilar aluminum sheets10.1016/j.ijfatigue.2009.11.009 ↗
20. Failure modes and fatigue life estimations of spot friction welds in cross-tension specimens of aluminum 6061-T6 sheets10.1016/j.ijfatigue.2011.11.003 ↗
21. Effect of re-filling probe hole on tensile failure and fatigue behaviour of friction stir spot welded joints in Al–Mg–Si alloy10.1016/j.ijfatigue.2008.01.006 ↗
22. Muthukumaran S. An improved friction forming process and a friction forming machine with a tool and fixture, Indian Patent 242420, August 27, 2010.
23. Refilling probe hole of friction spot joints by friction forming10.1080/10426914.2011.551959 ↗
24. Comparison of microstructure and mechanical properties of conventional and refilled friction stir spot welds in AA 6061-T6 using filler plate10.1016/S1003-6326(13)62804-6 ↗
25. Dieter George · 1988