Static shear strength and fatigue life of refill friction stir spot welded AA 6061-T6 sheets
Source abstract
Abstract
This study was aimed at evaluating the static shear strength and fatigue properties of the newly developed refilled friction stir spot welded AA 6061-T6 joints. The keyhole, the process disadvantage of conventional friction stir spot welding, was refilled successfully, using an additional filler plate, with specially designed tools. Two different tool profiles, namely, convex and concave, were used for the refilling process. Sound and defect free joints were obtained by the refilling process. Joints refilled with convex tools showed better static shear strength than those with the concave ones. The variation of microhardness in different regions of the weld was analysed. Fatigue tests were conducted on the lap shear specimens at a stress ratio of R = 0·1. The optical micrographs of the welds after fatigue failure in both the conventional and refilled processes were examined to study the fatigue crack propagation and failure modes.
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Research context
OpenAlex topics: Advanced Welding Techniques Analysis · Welding Techniques and Residual Stresses · Metal Forming Simulation Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India
Department of Mechanical Engineering, Indian Institute of Science, Bangalore 560012, India
References (33)
Show source-provided references
1. 10.1016/S0921-5093(02)00073-410.1016/S0921-5093(02)00073-4 ↗
2. 10.1179/136217110X1278588954958910.1179/136217110X12785889549589 ↗
3. 10.4271/2006-01-077410.4271/2006-01-0774 ↗
4. Thomas W. M., Nicholas E. D., Needham J. C., Murch M. G., Temple-Smith P., and Dawes C. J. ‘Friction stir welding’, International Patent Application no. PCT/GB92/02203 and Great Britain Patent Application no. 9125978·8, 1991.
5. Dawes C. J. · Weld. J. · 1996 · 75 · 41
6. Mazda media release: ‘Mazda develops world's first aluminum joining technology using friction heat’, 2003, http://www.mazda.com/publicity/release/0227e.html
7. 10.1016/j.matdes.2011.03.05810.1016/j.matdes.2011.03.058 ↗
8. 10.1016/j.matdes.2012.01.02710.1016/j.matdes.2012.01.027 ↗
9. 10.1179/174329307X15980110.1179/174329307X159801 ↗
10. 10.1179/1362171811Y.000000004310.1179/1362171811Y.0000000043 ↗
11. 10.1016/j.scriptamat.2006.07.04610.1016/j.scriptamat.2006.07.046 ↗
12. 10.1007/s11661-007-9155-010.1007/s11661-007-9155-0 ↗
13. Iwashita T. ‘Method and apparatus for joining’, US Patent no. 6601751 B2, 2003.
14. 10.1016/j.matdes.2012.08.02610.1016/j.matdes.2012.08.026 ↗
15. 10.1016/j.ijfatigue.2008.01.00610.1016/j.ijfatigue.2008.01.006 ↗
16. 10.1016/j.matdes.2013.08.02110.1016/j.matdes.2013.08.021 ↗
17. 10.1179/1362171812Y.000000005810.1179/1362171812Y.0000000058 ↗
18. Shilling C., and Dos Santos J. ‘Method and Device for Joining at Least Two Adjoining Work Pieces by Friction Welding’, US patent no. 0179682, 2002.
19. 10.1016/j.jmatprotec.2012.12.00910.1016/j.jmatprotec.2012.12.009 ↗
20. Fox S. L. ‘Refill friction stir spot weld repair of a fatigue crack. Research experience for undergraduates’; 2010, Rapid City, SD, South Dakota School of Mines and Technology.
21. 10.1016/j.msea.2012.07.01910.1016/j.msea.2012.07.019 ↗
22. 10.1016/j.ijfatigue.2011.11.00310.1016/j.ijfatigue.2011.11.003 ↗
23. 10.1016/j.ijfatigue.2008.05.02510.1016/j.ijfatigue.2008.05.025 ↗
24. 10.1016/j.matdes.2013.07.09810.1016/j.matdes.2013.07.098 ↗
25. 10.1179/1362171811Y.000000010010.1179/1362171811Y.0000000100 ↗
26. 10.1179/1362171811Y.000000003210.1179/1362171811Y.0000000032 ↗
27. Muthukumaran S. ‘An improved friction forming process and a friction forming machine with a tool and fixture’, Indian Patent Application no. 137/KOL/06 (filed on 16 February 2006), Patent No. 242420 (granted on 27 August 2010).
28. 10.1080/10426914.2011.55195910.1080/10426914.2011.551959 ↗
29. Specimens dimensions and procedure for shear testing resistance spot and embossed projection welded joints’, JIS Z 3136, Japanese Standards Association, Tokyo, Japan, 1999.
30. 10.1016/j.matdes.2010.11.01710.1016/j.matdes.2010.11.017 ↗
31. 10.1179/136217108X34760110.1179/136217108X347601 ↗
32. 10.1016/j.jmatprotec.2006.12.04510.1016/j.jmatprotec.2006.12.045 ↗
33. 10.1023/A:100438592816310.1023/A:1004385928163 ↗