AA7075 bit for repairing AA2219 keyhole by filling friction stir welding

Han, Bing; Huang, Yu Dong; Lv, Shixiong; Wan, Long; Feng, Jicai; Fu, Guansheng

doi:10.1016/j.matdes.2013.03.089

Cited by 78 publications

(24 citation statements)

References 20 publications

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“…The rotational and traverse speeds of the tool are considered as the most effective parameters in the microstructural and mechanical properties (particularly tensile strength) of joints that have been thoroughly investigated in this study. 2,33,34 Experimental procedure…”

Section: Fsw and Effective Parametersmentioning

confidence: 99%

“…Also, 7xxx Al alloys have a lot of applications in the aerospace industry due to the high strength to weight ratio and are the most widely used aluminum alloys in the aerospace structures. [1][2][3] As was deduced from the literature, friction stir welding (FSW) is a best solution for joining aluminum and its alloys. Various metals and alloys can be joined together by this technique.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mathematical modeling and optimization of friction stir welding process parameters in AA5083 and AA7075 aluminum alloy joints

Saeidi

Manafi

Givi

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this study, dissimilar joints of AA5083-H116 and AA7075-T6 aluminum alloys were successfully made by friction stir welding technique. The microstructure and mechanical behavior of the welded joints were investigated at different rotational and traverse speeds. A mathematical modeling was developed to demonstrate a relationship between the friction stir welding parameters and the ultimate tensile strength of the dissimilar joints. Then, the mathematical modeling was optimized by genetic algorithm in order to find the optimum condition in which the maximum tensile strength of welded joints can be achieved. Eventually, genetic algorithm results confirmed that the maximum tensile strength of welded joints is achievable in rotational and traverse speeds of 500 r/min and 50 mm/min, respectively. The maximum error between experimental data and predicted model was less than 1%.

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Section: Fsw and Effective Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mathematical modeling and optimization of friction stir welding process parameters in AA5083 and AA7075 aluminum alloy joints

Saeidi

Manafi

Givi

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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show abstract

“…There are extensive researches about friction stir welding of 2000 series aluminum alloys and 7000 series aluminum alloys at home and abroad, but the research on dissimilar joint of 2A16 and 7075 aluminum alloys is few [6][7][8][9]. In this paper, 2A16/7075 aluminum alloys with the same kinds of aluminum alloys and different ones were respectively welded by friction stir welding.…”

Section: Introductionmentioning

confidence: 99%

Research on Microstructure and Properties of Friction Stir Welding Joint of 2A16 and 7075 Aluminum Alloy

Chen¹,

Tang²,

Zhang³

et al. 2017

dtetr

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ABSTRACT The joint of 2A16-7075,7075-7075 and 2A16-2A16 aluminum alloy were obtained by friction stir welding under the condition of the stir head rotating speed of 1000rpm and welding speed of 100mm/min. The morphology of nugget area in different joints by metallographic microscope and tensile test, impact test and hardness test of joints were done. The results show that the microstructure in weld nugget is equiaxed grain，fine isometric crystal structure，which has been dynamic recrystallized. Grain of TMAZ changed greatly, which has elongated microstructure, the microstructure in HAZ was coarsened compared with base material. The tensile strength of 2A16-2A16 friction stir welding joint is 188Mpa and that of the 7075-7075 joint is 172Mpa, but that of the 2A16-7075 joints is only 93Mpa. Impact test showed that impact energy of the same material of friction stir welding joint is higher than that of the dissimilar joint, the impact energy of 2A16-2A16 joint is the highest, which is 22.81J, Impact absorbing energy of base material is less than that of the weld nugget zone at room temperature. The hardness distribution of three friction stir welding joint show "W" type roughly. The hardness on both sides of the base material is the maximum, the hardness in the HAZ and TMAZ decline. The hardness values of NZ is higher than that of the HAZ, hardness at the junction of different regions has abrupt change.

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“…During the repairing of defect process, if no material is added into the groove or tunnel, it easily leads to thickness reduction and then decreases the ability of loading bearing, deteriorating mechanical properties. Besides the groove and tunnel defects, a gap before welding at the interface between two workpieces, resulted from the extrusion effect of FSW or accumulation of some manufacturing errors of large structures, cannot be neglected, which always leads to the reduction of joint quality [11][12][13][14][15][16]. Seidel et al [11] found that the occurrence of gap could not only make plasticized materials flow into gap resulting in the loss of materials and then produces the lack of root penetration but also lead to thickness reduction of joint.…”

Section: Introductionmentioning

confidence: 99%

“…Besides the groove and tunnel defects, a gap before welding at the interface between two workpieces, resulted from the extrusion effect of FSW or accumulation of some manufacturing errors of large structures, cannot be neglected, which always leads to the reduction of joint quality [11][12][13][14][15][16]. Seidel et al [11] found that the occurrence of gap could not only make plasticized materials flow into gap resulting in the loss of materials and then produces the lack of root penetration but also lead to thickness reduction of joint. Yang et al [14], Wanjara et al [15], and Shultz et al [16] also investigated the effect of gap during FSW process and expounded that a gap could lead to the decrease of effective contact area or appearance of wormhole, fabricating an unsuitable weld.…”

Section: Introductionmentioning

confidence: 99%

Investigation of vertical compensation friction stir-welded 7N01-T4 aluminum alloy

Meng

et al. 2015

Int J Adv Manuf Technol

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Vertical compensation friction stir welding (VCFSW) is successfully applied to weld 7N01-T4 aluminum alloy, and effects of welding speed on joint quality are investigated. The results show that when compensation strip width is 1 mm, the defect-free joint is obtained at the welding speed of 50 mm/min and constant rotational velocity of 2000 rpm. Moreover, the intercalation lamellae structure formed in nugget zone (NZ) can reveal material flow behavior clearly. As strip width increases to 1.5 mm, it is difficult to attain sound joint. Decreasing welding speed is beneficial to surface formation of VCFSW joint. The increase of welding speed decreases tensile strength and elongation of joint. At the welding speed of 50 mm/min and strip width of 1 mm, the tensile strength and elongation of VCFSW joint are 295.7 MPa and 6.7 %, equivalent to 66 and 39.4 % of BM, respectively, while fracture surface of joint presents typical ductile fracture. The hardness distribution of joint shows typical W shape, and the hardness of NZ exhibits uniform distribution.

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AA7075 bit for repairing AA2219 keyhole by filling friction stir welding

Cited by 78 publications

References 20 publications

Mathematical modeling and optimization of friction stir welding process parameters in AA5083 and AA7075 aluminum alloy joints

Mathematical modeling and optimization of friction stir welding process parameters in AA5083 and AA7075 aluminum alloy joints

Research on Microstructure and Properties of Friction Stir Welding Joint of 2A16 and 7075 Aluminum Alloy

Investigation of vertical compensation friction stir-welded 7N01-T4 aluminum alloy

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