Eliminating the cavity defect and improving mechanical properties of TA5 alloy joint by titanium alloy supporting friction stir welding

Du, Shuaishuai; Liu, Huijie; Jiang, Minghao; Hu, Yanying; Zhou, Li

doi:10.1016/j.jmapro.2021.07.044

Cited by 12 publications

(2 citation statements)

References 24 publications

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“…To surmount the obstacles, some improved FSW methods, such as pulse current-assisted FSW [ 24 ] and innovative FSW tools [ 25 ], have been proposed to enhance plastic flow and augment the metallurgical bonding strength. The strategy of reducing back heat dissipation to control heat distribution, inhibit the formation of welding defects, and improve joint performance has been applied in Ti alloy FSW [ 26 , 27 ]. Furthermore, Du et al [ 28 ] developed a technique termed dynamic support friction stir welding (DSFSW), which employs a small-diameter support shoulder in place of the traditional backing plate.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Mg-Li/Al Dissimilar Joints via Dynamic Support Friction Stir Lap Welding

Gao,

Zuo,

Liu

et al. 2024

Materials

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In this study, two-mm-thick dual-phase LA103Z Mg-Li and 6061 Al alloys, known for their application in lightweight structural designs, were joined using dynamic support friction stir lap welding (DSFSLW). The microstructural evolution and mechanical properties of dissimilar joints were investigated at different welding speeds. The analysis revealed two distinct interfaces: the diffusion interface and the mixed interface. The diffusion interface, characterized by a pronounced diffusion zone, is formed under slower welding speeds. The diffusion zone height, the effective lap width, and the interface layer thickness decrease with increasing welding speed due to low plastic deformation capacity and weak interfacial reactions. Conversely, the mixed interface, associated with higher welding speeds, contained large Al fragments. The extremely high microhardness values (130.5 HV) can be ascribed to the formation of intermetallic compounds (IMCs) and strain-hardened Al fragments. Notably, the maximum shear strength achieved was 175 N/mm at a welding speed of 20 mm/min. The fracture behavior varied significantly with the interface type; the diffusion interface showed enhanced mechanical strength due to better intermetallic reactions and interlocking structures, while the mixed interface displayed more linear crack propagation due to weaker IMCs and the absence of hook structures. Fracture surface analysis indicates that fractures are more likely to propagate through the Al matrix and interface layers.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Mg-Li/Al Dissimilar Joints via Dynamic Support Friction Stir Lap Welding

Gao,

Zuo,

Liu

et al. 2024

Materials

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“…During the manufacturing processes of aerospace structures, all types of materials require welding and joining at the highest quality possible. Friction stir welding (FSW) has been proven to satisfy the required quality of welding different types of materials, especially those with low-softening-temperature alloys [15][16][17][18][19][20], and is relatively applied in high-softening-temperature materials such as titanium alloys [21][22][23][24][25] and steel alloys [26][27][28][29][30][31][32][33][34][35]. This is mainly because the available tool materials can be used satisfactorily to produce very long-distance joints without any significant degradation [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Friction Stir Welding of Aluminum in the Aerospace Industry: The Current Progress and State-of-the-Art Review

et al. 2023

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The use of the friction stir welding (FSW) process as a relatively new solid-state welding technology in the aerospace industry has pushed forward several developments in different related aspects of this strategic industry. In terms of the FSW process itself, due to the geometric limitations involved in the conventional FSW process, many variants have been required over time to suit the different types of geometries and structures, which has resulted in the development of numerous variants such as refill friction stir spot welding (RFSSW), stationary shoulder friction stir welding (SSFSW), and bobbin tool friction stir welding (BTFSW). In terms of FSW machines, significant development has occurred in the new design and adaptation of the existing machining equipment through the use of their structures or the new and specially designed FSW heads. In terms of the most used materials in the aerospace industry, there has been development of new high strength-to-weight ratios such as the 3rd generation aluminum–lithium alloys that have become successfully weldable by FSW with fewer welding defects and a significant improvement in the weld quality and geometric accuracy. The purpose of this article is to summarize the state of knowledge regarding the application of the FSW process to join materials used in the aerospace industry and to identify gaps in the state of the art. This work describes the fundamental techniques and tools necessary to make soundly welded joints. Typical applications of FSW processes are surveyed, including friction stir spot welding, RFSSW, SSFSW, BTFSW, and underwater FSW. Conclusions and suggestions for future development are proposed.

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Effects of process parameters on joint formation and tool wear behavior in friction stir welded TA5 alloy

Liu

Gao

et al. 2022

Int J Adv Manuf Technol

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Eliminating the cavity defect and improving mechanical properties of TA5 alloy joint by titanium alloy supporting friction stir welding

Cited by 12 publications

References 24 publications

Microstructure and Mechanical Properties of Mg-Li/Al Dissimilar Joints via Dynamic Support Friction Stir Lap Welding

Microstructure and Mechanical Properties of Mg-Li/Al Dissimilar Joints via Dynamic Support Friction Stir Lap Welding

Friction Stir Welding of Aluminum in the Aerospace Industry: The Current Progress and State-of-the-Art Review

Effects of process parameters on joint formation and tool wear behavior in friction stir welded TA5 alloy

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