Abstract
The aim of this study is to determine the fracture toughness of friction stir-welded (FSW) lap joints of aluminum alloys. FSW lap joints of AA 2014 and AA 6063 aluminum alloy plates were performed on a conventional semiautomatic milling machine. FSW lap joints were produced on alloy plates. Fracture toughness of FSW lap joints were calculated from the results of tensile shearing tests. New empirical equations were developed for fracture toughness and energy release rate based on the relation between the hardness and fracture toughness values. Fracture toughness of FSW lap joints increases exponentially as the hardness reduces. The results of the experiments showed that the amount of Si content in Al alloys affects the fracture toughness of the FSW lap joints.
Similar content being viewed by others
References
S.R. Ren, Z.Y. Ma, and L.Q. Chen, Effect of Welding Parameters on Tensile Properties and Fracture Behavior of Friction Stir Welded Al-Mg-Si Alloy, Scr. Mater., 2007, 56(1), p 69–72
G. Çam, H.T. Serindağ, A. Çakan, S. Mıstıkoğlu, and H. Yavuz, The Effect of Weld Parameters on Friction Stir Welding of Brass Plates, Mat.-wiss. u. Werkstofftech., 2008, 39(6), p 394–399
M.K. Kulekci, F. Mendi, I. Sevim, and O. Basturk, Fracture Toughness of Friction Stir-Welded Joints of AlCu4SiMg Aluminium Alloy, Metalurgija, 2005, 44(3), p 209–213
G. Çam, S. Güçlüer, A. Çakan, and H.T. Serindağ, Mechanical Properties of Friction Stir Butt-Welded Al-5086 H32 Plate, Mat.-wiss. u. Werkstofftech., 2009, 40(8), p 638–642
H. Uzun, C.D. Donne, A. Argagnotto, T. Ghidini, and C. Gambaro, Friction Stir Welding of Dissimilar Al 6013-T4 To X5CrNi18-10 Stainless Steel, Mater. Des., 2005, 26(1), p 41–46
S. Rajakumar, C. Muralidharan, and V. Balasubramanian, Influence of Friction Stir Welding Process and Tool Parameters on Strength Properties of AA7075-T-6 Aluminium Alloy Joints, Mater. Des., 2010, 32(2), p 535–539
K. Colligan, Material Flow Behaviour During Friction Stir Welding of Aluminium, Weld. Res., 1999, 78(7), p 229–237
M.K. Kulekci and A. Sik, Effects of Tool Rotation and Traverse Speed on Fatigue Properties of Friction Stir Welded AA 1050-H18 Aluminium Alloy, Arch. Metall. Mater., 2006, 51(2), p 213–216
J.Q. Su, T.W. Nelson, R. Mishra, and M. Mahoney, Microstructural Investigation of Friction Stir Welded 7050-T651 Aluminium, Acta Mater., 2003, 51(3), p 713
M.K. Kulekci, E. Kaluc, A. Sik, and O. Basturk, Experimental Comparison of MIG and Friction Stir Welding Processes for En AW-6061-T6 (Al Mg-1 Si Cu) Aluminium Alloy, Arab. J. Sci. Eng., 2010, 35(1B), p 321–330
W.M. Thomas, K.I. Johnson, and C.S. Wiesner, Friction Stir Welding—Recent Developments in Tool and Process Technologies, Adv. Eng. Mater., 2003, 5(7), p 485–490
I. Sevim and B. Eryürek, Effect of Fracture Toughness on Abrasive Wear Resistance of Steels, Mater. Des., 2006, 27(10), p 911–919
D. Broek, Elementary Engineering Fracture Mechanics, Noordhoff International Publishing, Neyden, The Netherlands, 1976
I. Sevim, Fracture Toughness for Spot-Welded Steel Joints, Kovove Mater., 2005, 43(2), p 113–123
Y.D. Chung, H. Fujii, K. Nakata, and K. Nogi, Friction Stir Welding of High Carbon Tool Steel (SK85) Below Eutoctoid Temperature, Trans. JWRI, 2009, 38(1), p 37–41
ACA METAL, from http://www.acametal.com.tr/page.php?ID=17, Accessed on February 9, 2011
I. Sevim, Effect of Hardness to Fracture Toughness for Spot Welded Steel Sheets, Mater. Des., 2006, 27(1), p 21–30
G. Çam, S. Mistikoglu, and M. Pakdil, Microstructural and Mechanical Characterization of Friction Stir Butt Joint Welded 63% Cu-37% Zn Brass Plate, Weld. J., 2007, 88, p 225–232
Acknowledgments
This study is supported by “Research Foundation of Mersin University” under project of 2007/2.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kulekci, M.K., Sevim, I. & Esme, U. Fracture Toughness of Friction Stir-Welded Lap Joints of Aluminum Alloys. J. of Materi Eng and Perform 21, 1260–1265 (2012). https://doi.org/10.1007/s11665-011-0017-y
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11665-011-0017-y