Dissimilar friction stir welding of immiscible titanium and magnesium

Choi, Jeong-Won; Liu, Huihong; Ushioda, Kohsaku; Fujii, Hidetoshi

doi:10.1016/j.mtla.2019.100389

Cited by 21 publications

(10 citation statements)

References 28 publications

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“…Employment of other ranges of speeds of tool traverse (including 0.5, 1.0, 2.0 and 2.5 mm/sec) had only resulted in the attainment of defective joints. It reveals that the employed 1.5mm/sec tool traverse speed have permitted the threaded cylindrically tapered pin geometry of the tool and its shoulder to soften the inner and exterior regions of the parent metals for a sufficient time, thereby, leading to the attainment of remarkable quality joints of distinctive alloys of Mg 16,35,42,43 .…”

Section: Investigations On Joint No:ii-3mentioning

confidence: 99%

“…In recent years, researchers have also flourishingly employed FSW to join alloys of Mg with other metals including Steel, Ti, Al [32][33][34][35][36][37][38] , etc. For instance, Md and Birru 33 investigated the mixing of materials during FSW of aluminium alloy (namely AA6082-T6) and magnesium alloy (namely AZ91), by changing the position of these two distinctive parent materials on the side of advancement and retraction alternatively.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Tool Pin Geometry and Process Parameters During FSW of Dissimilar Alloys of Mg

Yaknesh¹,

Sampathkumar²,

Sevvel³

2022

Mat. Res.

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Effect of two distinctive tool designs along with other tool related parameters including speed of traverse of tool and offset distance of tool pin during friction stir welding of dissimilar AZ91C and AZ31B alloys of Mg were investigated. Experimental recordings revealed that all the joints fabricated during 1 st set of investigations employing cylindrically tapered pin geometry and their offset distances being 0.5 mm or 1mm towards any one of the parent metals possessed flaws. Joint No: II-3 fabricated in 2 nd set of investigations by employing 15mm diameter inner shoulder tool with threaded cylindrical tapered pin geometry at a tool offset distance of 0 mm was found be free from flaws. This joint exhibited a tensile strength of 186 MPa which was 78.81% of AZ91C and 70.72% of another parent metal AZ31B. Existence of intermetallic phased constituents, namely, Mg 17 Al 12 in several regions of fractured surfaces have contributed to the supplementary brittleness in the zone of nugget, and have reduced the tensile strength of the joint.

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Section: Investigations On Joint No:ii-3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Tool Pin Geometry and Process Parameters During FSW of Dissimilar Alloys of Mg

Yaknesh¹,

Sampathkumar²,

Sevvel³

2022

Mat. Res.

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“…[ 3 ] The formation of intermetallics and oxides during the joining process can have a detrimental effect on the properties of the joint. [ 4 ] Additionally, due to the substantial difference in thermal conductivities, more heat is transferred toward the Al side, resulting in an inhomogeneous structure in the stir zone (SZ). To meet specific performance requirements and guarantee product reliability and durability, it is crucial to have homogeneous microstructures.…”

Section: Introductionmentioning

confidence: 99%

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

Sundar. A,

Mugada,

Kumar

2023

Adv Eng Mater

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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.

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“…Effect of HEA/Al composite interlayer on microstructure and mechanical property of Ti/Mg bimetal composite by solid-liquid compound casting bimetal composites mainly include diffusion bonding [6] , friction stir welding [7][8] , tungsten inert gas welding [9] , laser welding [10][11][12] , transient liquid phase bonding [13] , and so on.…”

mentioning

confidence: 99%

“…Xu et al [22] revealed that TiAl 3 intermetallic compound layer was formed in the interface region of Ti/Mg joint with the addition of Al foil by resistance spot welding, which is the key to achieve joint strengthening. Choi et al [7] used dissimilar friction stir welding method to insert aluminum foil between titanium and magnesium. A thin intermetallic compound layer was formed at the welding interface and the joint with optimal tensile strength of 150 MPa was obtained.…”

mentioning

confidence: 99%

Effect of HEA/Al composite interlayer on microstructure and mechanical property of Ti/Mg bimetal composite by solid-liquid compound casting

et al. 2022

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The urgent need for environmental protection and energy conservation in industrial development makes materials with high structural integration and strong comprehensive performance gain wide attention [1][2] . Currently, various materials with different properties have been connected to meet the needs of different applications, including Ti/Mg bimetal composites which combine the excellent corrosion resistance and high temperature properties of titanium with the lightweight and recyclability of magnesium [3][4][5] . Combining the advantages of Ti and Mg could meet the lightweight, economic and performance requirements for the components to expand their applications in aerospace and automotive fields. Manufacturing methods of Ti/Mg

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Dissimilar friction stir welding of immiscible titanium and magnesium

Cited by 21 publications

References 28 publications

Effect of Tool Pin Geometry and Process Parameters During FSW of Dissimilar Alloys of Mg

Effect of Tool Pin Geometry and Process Parameters During FSW of Dissimilar Alloys of Mg

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

Effect of HEA/Al composite interlayer on microstructure and mechanical property of Ti/Mg bimetal composite by solid-liquid compound casting

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