Investigation of the microstructure, mechanical properties and fracture mechanisms of dissimilar friction stir welded aluminium/titanium joints

Shehabeldeen, Taher A.; Yin, Yajun; Ji, Xiaoyuan; Shen, Xu; Zhang, Zhipeng; Zhou, Jianxin

doi:10.1016/j.jmrt.2021.01.026

Cited by 34 publications

(11 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…14 However, FSW process would be a better alternative for conventional processes when it is joining dissimilar materials. As an evidence sound welds for dissimilar Al-Al, 15 Mg-Mg, 16 Cu-Cu, 17 steel-steel 18 alloys and the combination of Al/Mg, 19 Al/Cu, 20 Al/steel, 21 Al/Ti, 22 Mg/steel, 23 Ti/steel, 24 Cu/steel 25 and stainless steel/superalloy 26 were reported.…”

Section: Introductionmentioning

confidence: 96%

Friction stir welding of dissimilar alloy combinations—A Review

ShivaKumar

Rajamurugan

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Friction stir welding (FSW) is one among solid-state welding processes that can be employed for producing joints between dissimilar combinations with more ease than that of fusion welding processes. Several high coupled physical phenomena have addressed FSW as an extremely complex process. It is around three decades of invention, optimization of the parameters have been carried out even today by many researchers all over the world to obtain sound joints. This article focuses mainly on the research developments in the dissimilar FSW (DFSW), with the factors that are involved in joint fabrication between dissimilar materials. From the literature, it is found that the most influential factors in deciding the quality of the joints are pin profile, shoulder shape, welding speed and tool rotational speed. In addition, all other parameters will provide incremental support to it. The study on microstructure in different zones and the mechanical properties of welded specimens are elaborated from the available literature. Special attention is given to the reinforcement of micro- and nano- sized solid particles in the DFSW process. Future studies of DFSW are discussed based on the untracked studies that are not available in the literature.

show abstract

Section: Introductionmentioning

confidence: 96%

Friction stir welding of dissimilar alloy combinations—A Review

ShivaKumar

Rajamurugan

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…The formation of intermetallic compounds at the aluminum–titanium interface is also of great concern [ 1 , 2 , 3 ]. Usually, intermetallic TiAl 3 has been reported to form [ 2 , 3 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ], presumably due to the comparatively low free energy of the intermetallic reaction in this case [ 20 ]. However, the details of this process are unclear.…”

Section: Introductionmentioning

confidence: 99%

“…However, the details of this process are unclear. In some cases, TiAl [ 3 , 6 , 7 , 9 , 10 , 15 ] and Ti 3 Al [ 2 , 3 , 6 , 21 ] phases have also been found. As shown by Choi et al [ 6 ], the development of TiAl and Ti 3 Al intermetallics is associated with a diffusion penetration of aluminum through the early-formed TiAl 3 phase.…”

Section: Introductionmentioning

confidence: 99%

“…A significant problem is also the dispersion of titanium fragments in the aluminum part, which also typically occurs during dissimilar FSW of aluminum and titanium [ 5 , 6 , 7 , 8 , 14 , 15 , 18 , 23 , 25 , 29 , 30 , 31 , 32 , 33 ]. This effect also results in micro-cracking and, thus, finally leads to the early fracturing of the welded joints [ 1 , 6 , 7 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

“…This simple approach reduces tool abrasion while also localizing the spatial distribution of titanium fragments in a relatively small area [ 1 , 3 , 10 , 22 ]. Moreover, the minimizing of the interaction between the welding tool and titanium lowers the FSW heat input [ 2 ] and, thus, shrinks the intermetallic layer [ 1 , 5 , 6 , 13 , 15 , 22 , 32 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Tailoring of Dissimilar Friction Stir Lap Welding of Aluminum and Titanium

et al. 2022

View full text Add to dashboard Cite

An approach was proposed to optimize dissimilar friction stir lap welding of aluminum and titanium alloys. The basic concept of the new technique included (i) the plunging of the welding tool solely into the aluminum part (i.e., no direct contact with the titanium side) and (ii) the welding at a relatively high-heat input condition. It was shown that sound welds could be readily produced using an ordinary cost-effective tool, with no tool abrasion and no dispersion of harmful titanium fragments within the aluminum side. Moreover, the intermetallic layer was found to be as narrow as ~0.1 µm, thus giving rise to excellent bond strength between aluminum and titanium. On the other hand, several important shortcomings were also revealed. First of all, the high-heat input condition provided significant microstructural changes in the aluminum part, thereby resulting in essential material softening. Furthermore, the new approach was not feasible in the case of highly alloyed aluminum alloys due to the relatively low rate of self-diffusion in these materials. An essential issue was also a comparatively narrow processing window.

show abstract

Microstructural Evolution, Intermetallic Formation, and Mechanical Performance of Dissimilar Al6061–Ti6Al4V Static Shoulder Friction Stir Welds

Sundar. A,

Mugada,

Kumar

2023

Adv Eng Mater

View full text Add to dashboard Cite

The present study focuses on achieving microstructural uniformity in dissimilar Al–Ti joints through static shoulder friction stir welding (SSFSW). This method restricts material mixing at the Al–Ti interface due to reduced shoulder action, resulting in peak temperatures of 317 °C (SSFSW) and 491 °C in conventional friction stir welding (CFSW). This reduction in heat input during SSFSW leads to decreased mechanical mixing, resulting in a thinner 2.169 μm intermetallic layer at interface of SSFSW compared to 5.485 μm in CFSW. The resulting weld nugget (WN) microstructure reveals the presence of Ti particles, intermetallic compounds, and fine Al‐associated grains. Rearrangement of dislocations through slip‐and‐climb mechanisms, along with distinct recrystallization processes in SSFSW, significantly reduces grain size within WN. The kernel average misorientation map highlights the presence of nonuniform dislocation concentrations at the interface of CFSW, attributed to the large Ti particles that impede the mobility of dislocations. As a result, the interface of CFSW is found to be the weakest among all the zones, eventually leading to the failure of the CFSW joint near the Ti interface after reaching an ultimate tensile strength of 259 MPa. In contrast, SSFSW welds achieve a higher tensile strength of 289 MPa.

show abstract

Investigation of the microstructure, mechanical properties and fracture mechanisms of dissimilar friction stir welded aluminium/titanium joints

Cited by 34 publications

References 47 publications

Friction stir welding of dissimilar alloy combinations—A Review

Friction stir welding of dissimilar alloy combinations—A Review

Tailoring of Dissimilar Friction Stir Lap Welding of Aluminum and Titanium

Microstructural Evolution, Intermetallic Formation, and Mechanical Performance of Dissimilar Al6061–Ti6Al4V Static Shoulder Friction Stir Welds

Contact Info

Product

Resources

About