In this study, synergistic double-sided friction stir welding (DS-FSW) is proposed to solve the problems of large deformation and the time-consuming of traditional DS-FSW. The microstructure, mechanical properties, and fracture paths of novel and conventional joints are studied under different welding parameters. Results show that defects in novel joints have been improved. However, the grain size in the stir zone of novel joints is larger than that of conventional joints. The microhardness map of the novel joint shows a more uniform distribution compared to that of the conventional joint. At a rotational speed of 1800 rpm and transverse speed of 1000 mm min−1, the distortion of the novel joint and conventional joint is 0.1 and 1 mm, respectively. The tensile force of novel joints is higher than that of conventional joints for the same welding parameters. The maximum tensile force of novel and conventional joints is 36.8 and 34.9 kN, respectively.
PatelV, De BackerJ, HindsefeltH, . High speed friction stir welding of AA6063-T6 alloy in lightweight battery trays for EV industry: influence of tool rotation speeds. Mater Lett. 2022;318:132135. doi:10.1016/j.matlet.2022.132135
2.
GeorgantziaE, GkantouM, KamarisGS.Aluminium alloys as structural material: a review of research. Eng Struct. 2021;227:111372. doi:10.1016/j.engstruct.2020.111372
3.
SinghP, DeepakD, BrarGS.Optical micrograph and micro-hardness behavior of dissimilar welded joints of aluminum (Al 6061-T6) and stainless steel (SS 304) with friction crush welding. Mater Today Proc. 2021;44:1000–1004. doi:10.1016/j.matpr.2020.11.171
4.
RaturiM, BhattacharyaA.Attributes of intergranular corrosion in AA6061-AA7075 double sided friction stir weld. Mater Chem Phys. 2023;298:127429. doi:10.1016/j.matchemphys.2023.127429
5.
SelvamaniST.Microstructure and stress corrosion behaviour of CMT welded AA6061 T-6 aluminium alloy joints. J Mater Res Technol. 2021;15:315–326. doi:10.1016/j.jmrt.2021.08.005
6.
AydınH, BayramA, Durgunİ. The effect of post-weld heat treatment on the mechanical properties of 2024-T4 friction stir-welded joints. Mater Des (1980–2015). 2010;31:2568–2577. doi:10.1016/j.matdes.2009.11.030
7.
ElangovanK, BalasubramanianV.Influences of post-weld heat treatment on tensile properties of friction stir-welded AA6061 aluminum alloy joints. Mater Charact. 2008;59:1168–1177. doi:10.1016/j.matchar.2007.09.006
8.
NosratiHG, YazdaniNM, KhoranM.Double-sided friction stir welding of AA 2024-T6 joints: mathematical modeling and optimization. CIRP J Manuf Sci Technol. 2022;36:1–11. doi:10.1016/j.cirpj.2021.10.010
9.
XuW, WangH, LuoY, . Mechanical behavior of 7085-T7452 aluminum alloy thick plate joint produced by double-sided friction stir welding: effect of welding parameters and strain rates. J Manuf Process. 2018;35:261–270. doi:10.1016/j.jmapro.2018.07.028
10.
ChenYC, LiuHJ, FengJC.Effect of post-weld heat treatment on the mechanical properties of 2219-O friction stir welded joints. J Mater Sci. 2005;40:4657–4659. doi:10.1007/s10853-005-4085-y
11.
MengXC, HuangYX, CaoJ, . Recent progress on control strategies for inherent issues in friction stir welding. Prog Mater Sci. 2021;115:100706. doi:10.1016/j.pmatsci.2020.100706
12.
NiuPL, LiWY, LiN, . Exfoliation corrosion of friction stir welded dissimilar 2024-to-7075 aluminum alloys. Mater Charact. 2019;147:93–100. doi:10.1016/j.matchar.2018.11.002
13.
MishraRS, MaZY.Friction stir welding and processing. Mater Sci Eng R: Rep. 2005;50:1–78. doi:10.1016/j.mser.2005.07.001
14.
NandanR, DebroyT, BhadeshiaH.Recent advances in friction-stir welding—process, weldment structure and properties. Prog Mater Sci. 2008;53:980–1023. doi:10.1016/j.pmatsci.2008.05.001
15.
ThakurA, SharmaV, BhadauriaSS.Improving tensile properties by varying the welding conditions of the passes of the double-sided friction stir welding of AZ31B magnesium alloy. Mater Today Commun. 2023;34:105406. doi:10.1016/j.mtcomm.2023.105406
16.
ThakurA, SharmaV, BhadauriaSS.Effect of tool tilt angle on weld joint strength and microstructural characterization of double-sided friction stir welding of AZ31B magnesium alloy. CIRP J Manuf Sci Technol. 2021;35:132–145. doi:10.1016/j.cirpj.2021.05.009
17.
PriyasudanaD, CrisdionSA, PuspitasariP, . Double side friction stir welding effect on mechanical properties and corrosion rate of aluminum alloy AA6061. Heliyon. 2023;9:e13366. doi:10.1016/j.heliyon.2023.e13366
18.
GargA, RaturiM, GargA, . Microstructure evolution and mechanical properties of double-sided friction stir welding between AA6061-T6 and AA7075-T651. CIRP J Manuf Sci Technol. 2020;31:431–438. doi:10.1016/j.cirpj.2020.07.005
19.
HuW, LiQ, WangY, . Effect of welding parameters on microstructure and mechanical properties of friction-stir-welded Al–Mg–Si alloy. J Mater Eng Perform. 2020;29:866–876. doi:10.1007/s11665-020-04651-x
20.
ZhouMR, MorisadaY, FujiiH, . Mechanical properties optimization of AZX612-Mg alloy joint by double-sided friction stir welding. J Mater Process Technol. 2018;254:91–99. doi:10.1016/j.jmatprotec.2017.11.014
21.
ZhouMR, SunYF, MorisadaY, . The material flow and texture-weakening mechanism in double-sided friction stir welded Mg alloy. Sci Technol Weld Join. 2023;28:154–161. doi:10.1080/13621718.2022.2139451
22.
ZhouMR, MorisadaY, FujiiH.Effect of Ca addition on the microstructure and the mechanical properties of asymmetric double-sided friction stir welded AZ61 magnesium alloy. J Magnesium Alloys. 2020;8:91–102. doi:10.1016/j.jma.2020.02.001
23.
KarA, SuwasS, KailasSV.Multi-length scale characterization of microstructure evolution and its consequence on mechanical properties in dissimilar friction stir welding of titanium to aluminum. Metall Mater Trans A. 2019;50:5153–5173. doi:10.1007/s11661-019-05409-4
24.
WangZL, WangBB, ZhangZ, . A feasible operational parameter window for enhancement of welding speed in friction stir welding of 2195-T8 Al–Li alloy. Sci Technol Weld Join. 2023:1–10. doi:10.1080/13621718.2023.2202039.
25.
ChuQ, LiWY, WuD, . In-depth understanding of material flow behavior and refinement mechanism during bobbin tool friction stir welding. Int J Mach Tools Manuf. 2021;171:103816. doi:10.1016/j.ijmachtools.2021.103816
26.
PadhyGK, WuCS, GaoS, . Local microstructure evolution in Al 6061-T6 friction stir weld nugget enhanced by ultrasonic vibration. Mater Des. 2016;92:710–723. doi:10.1016/j.matdes.2015.12.094
27.
CaoJY, WangM, KongL, . Microstructure, texture and mechanical properties during refill friction stir spot welding of 6061-T6 alloy. Mater Charact. 2017;128:54–62. doi:10.1016/j.matchar.2017.03.023
28.
EdwardsGA, StillerK, DunlopGL, . The precipitation sequence in Al–Mg–Si alloys. Acta Mater. 1998;46:3893–3904. doi:10.1016/S1359-6454(98)00059-7
29.
LiuXC, WangQ, PeiXJ, . Microstructural evolution of 6061-T6 aluminum alloy in vortex-friction stir welding. Mater Charact. 2023;195:112544. doi:10.1016/j.matchar.2022.112544
30.
MishraRS, MaZY.Friction stir welding and processing. Mater Sci Eng: R: Rep. 2005;50:1–78. doi:10.1016/j.mser.2005.07.001
31.
PatilS, NagamadhuM, MalyadriT.A critical review on microstructure and hardness of aluminum alloy 6061 joints obtained by friction stir welding-past, present, and its prospects. Mater Today Proc. 2023;82:75–78. doi:10.1016/j.matpr.2022.11.362
32.
AlinaghianI, AminiS, HonarpishehM.Residual stress, tensile strength, and macrostructure investigations on ultrasonic assisted friction stir welding of AA 6061-T6. J Strain Anal Eng Des. 2018;53:494–503. doi:10.1177/0309324718789768
