Abstract
In regard to the non-tool-tilt friction stir welding (NTT-FSW) process, the shoulder concavity has significant effects on the control of heat generation and material flow, and thus is an important geometrical feature for the tool design. In this paper, three types of shoulder concavity angles (SCAs), i.e., 0°, 5°, and 10°, were selected to explore the impact of SCA on the NTT-FSW of 5052 aluminum alloy. The results indicate that the increase of SCA lowers the tool axial force, reduces the nugget width, and weakens the band structure in the nugget. A weakening of shoulder thermal effect occurs from 0° to 5° SCA, leading to an improvement of the structure-property of the NTT-FSW joint. Further increasing the SCA to 10° causes the generation of the secondary sliding frictional heat at the interface between the shoulder-driven material and the base material, and thus the shoulder thermal effect does not show a continuous weakening trend as expected but becomes stronger instead, resulting in the deterioration of the microstructure evolution and the degradation of the tensile strength of NTT-FSW joint.
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References
Threadgill PL, Leonard AJ, Shercliff HR, Withers PJ (2009) Friction stir welding of aluminium alloys. Int Mater Rev 54:49–93
Cam G, Mistikoglu S (2014) Recent developments in friction stir welding of al-alloys. J Mater Eng Perform 23:1936–1953
Dubourg L, Dacheux P (2006) Design and properties of FSW tools: a literature review. 6th International Symposium on Friction Stir Welding, Session 1, Nr Montrral, Canada
Zhang YN, Cao X, Larose S, Wanjara P (2012) Review of tools for friction stir welding and processing. Can Metall Q 51:250–261
Hirano S, Okamoto K, Aota K, Okamura H, Aono Y, Odakura T (2001) Development of 3 dimensional type friction stir welding equipment. 3rd International Symposium on Friction Stir Welding, Session 1, Kobe, Japan
Amini S, Amiri MR, Barani A (2015) Investigation of the effect of tool geometry on friction stir welding of 5083-O aluminum alloy. Int J Adv Manuf Technol 76:255–261
Leal RM, Sakharova N, Vilaca P, Rodrigues DM, Loureiro A (2011) Effect of shoulder cavity and welding parameters on friction stir welding of thin copper sheets. Sci Technol Weld Join 16:146–152
Scialpi A, De Filippis LAC, Cavaliere P (2007) Influence of shoulder geometry on microstructure and mechanical properties of friction stir welded 6082 aluminium alloy. Mater Des 28:1124–1129
Zhang HJ, Wang M, Zhu Z, Zhang X, Yu T, Yang GX (2016) Improving the structure-property of aluminum alloy friction stir weld by using a non-shoulder-plunge welding tool. Int J Adv Manuf Technol 87:1095–1104
Longhurst WR, Strauss AM, Cook GE, Fleming PA (2010) Torque control of friction stir welding for manufacturing and automation. Int J Adv Manuf Technol 51:905–913
Schneider J, Beshears R, Nunes AC (2006) Interfacial sticking and slipping in the friction stir welding process. Mater Sci Eng A 435:297–304
Kumar K, Kailas SV (2008) The role of friction stir welding tool on material flow and weld formation. Mater Sci Eng A 485:367–374
Zhang HJ, Liu HJ (2012) Characteristics and formation mechanisms of welding defects in underwater friction stir welded aluminum alloy. Metall Microstr Anal 1:269–281
Arora A, Mehta M, De A, DebRoy T (2012) Load bearing capacity of tool pin during friction stir welding. Int J Adv Manuf Technol 61:911–920
Forcellese A, Martarelli M, Simoncini M (2016) Effect of process parameters on vertical forces and temperatures developed during friction stir welding of magnesium alloys. Int J Adv Manuf Technol 85:595–604
Babu N, Karunakaran N, Balasubramanian V (2017) A study to estimate the tensile strength of friction stir welded AA 5059 aluminium alloy joints. Int J Adv Manuf Technol 93:1–9
Zhang ZH, Yang XQ, Zhang JL, Zhou G, Xu XD, Zou BL (2011) Effect of welding parameters on microstructure and mechanical properties of friction stir spot welded 5052 aluminum alloy. Mater Des 32:4461–4470
Hasan MM, Ishak M, Rejab MRM (2017) Influence of machine variables and tool profile on the tensile strength of dissimilar AA7075-AA6061 friction stir welds. Int J Adv Manuf Technol 90:2605–2615
Liu HJ, Fujii H, Maeda M, Nogi K (2003) Tensile properties and fracture locations of friction-stir-welded joints of 2017-T351 aluminum alloy. J Mater Process Technol 142:692–696
Zhang HJ, Liu HJ, Yu L (2011) Microstructural evolution and its effect on mechanical performance of joint in underwater friction stir welded 2219-T6 aluminium alloy. Sci Technol Weld Join 16:459–464
Pešička J, Kužel R, Dronhofer A, Eggeler G (2003) The evolution of dislocation density during heat treatment and creep of tempered martensite ferritic steels. Acta Mater 51:4847–4862
Schmidt H, Hattel J (2005) Modelling heat flow around tool probe in friction stir welding. Sci Technol Weld Join 10:176–186
Nandan R, Roy GG, Lienert TJ, Debroy T (2007) Three-dimensional heat and material flow during friction stir welding of mild steel. Acta Mater 55:883–895
Funding
This study was supported by National Natural Science Foundation of China (Grant No. 51505471) and Youth Innovation Promotion Association, Chinese Academy of Sciences (Grant No. 2015162).
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Zhang, H.J., Wang, M., Zhu, Z. et al. Impact of shoulder concavity on non-tool-tilt friction stir welding of 5052 aluminum alloy. Int J Adv Manuf Technol 96, 1497–1506 (2018). https://doi.org/10.1007/s00170-018-1707-5
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DOI: https://doi.org/10.1007/s00170-018-1707-5