Effect of Tool Offset on the Microstructure and Properties of AA6061/AZ31B Friction Stir Welding Joints

Liu, Huachen; Chen, Yikun; Yu, Zhenhua; Luo, Feixiang

doi:10.3390/met10040546

Cited by 9 publications

(6 citation statements)

References 20 publications

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“…Sameer et al [14] studied the influence of the advancing side (AS) material on the distribution of the IMCs, and the results indicated that the IMCs layer was thinner when magnesium alloy was placed in the AS. Similar observations were obtained by Liu et al [15]. In the FSW process of dissimilar alloys, the full mixing of materials is accelerated by placing the matrix with poor plastic and ductility in the AS.…”

Section: Introductionsupporting

confidence: 87%

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Effect of Ni interlayer on microstructure and mechanical properties of Al/Mg dissimilar friction stir welding joints

Dong

Lin

Zhu

et al. 2021

Science and Technology of Welding and Joining

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In this work, friction stir welding (FSW) was carried out for the flat butt welding tests of Al/Mg dissimilar alloys by introducing Ni foil interlayer with different thickness. The effect of the thickness of interlayer on microstructure and mechanical properties of the FSW joints was explored. The results revealed that with the increase of the thickness of Ni, the effective bearing area of the weld nugget zone (WNZ) increased. It achieved the maximum value when the thickness of interlayer was 0.3 mm, and a dense 'onion rings' structure which was composed of the cross distributions trips of magnesium alloy, aluminium alloy and the intermetallic compounds (IMCs), as well as the Ni particles of varying sizes were formed. Compared to the joint without introducing Ni, the introduction of Ni made the joints generate Mg 2 Ni and the Al 3 Mg 2 was partially replaced and led to the ultimate tensile strength (UTS) increased by 13.5%.

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Section: Introductionsupporting

confidence: 87%

“…Similar observations were obtained by Liu et al. [15]. In the FSW process of dissimilar alloys, the full mixing of materials is accelerated by placing the matrix with poor plastic and ductility in the AS.…”

Section: Introductionsupporting

confidence: 86%

Effect of Ni interlayer on microstructure and mechanical properties of Al/Mg dissimilar friction stir welding joints

Dong

Lin

Zhu

et al. 2021

Science and Technology of Welding and Joining

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“…In dissimilar Al-Mg alloys welding process, the hardness was 86 Hv for Mg alloy set near the leading edge and 89 Hv for Mg alloy set on the trailing edge, this small modification on hardness value was due to material flow and IMC stream of Al and Mg [20]. The internal heat was reduced when increasing the tool offset to the Mg plate and the morphology of IMCs was distributed more homogeneous and the hardness value was declined [18]. The strong ultrasonic vibration can break the IMCs into fragments and enhance the finer grain size compared to conventional FSW and the mean hardness value of NZ was significantly increased [19].…”

Section: Analysis Of Microhardnessmentioning

confidence: 97%

Influences of Welding Parameters on Friction Stir Welding of Aluminum and Magnesium: A Review

Haribalaji¹,

Boopathi²

2021

Recent Advancements in Geotechnical Engineering

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Abstract. Friction stir welding (FSW) is an important joining process wherein two dissimilar metals and alloys are welded together using frictional heat produced in a revolving tool and workpiece. FSW is playing an important role in dissimilar material joining of Magnesium (Mg) and Aluminum (Al) materials due to the increasing demand for their industrial applications. In this review article, the research background of FSW processes, and influences of joining factors on tensile strength, micro-hardness, and microstructures of FSW of Al-Mg alloy materials have been studied. The effects of joining factors for example axial force, tool revolving speed, tool incline, speed, and offset on welding characterizes have been enlightened to make defect-free FSW of aluminum and magnesium alloys. The microstructural behaviors of intermetallic formation and material drift in FSW zones of Al-Mg were also studied to find the scope to improve the welding quality.

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“…The FSW process establishes different joining mechanisms in different joining configurations. In the overlap configuration, for example, the mechanical interlock plays the most important role in joining [10], although it has been reported that a metallurgical bond prevails when the FSW tool does not touch the lower layer [11]. The T configuration has recently attracted a lot of attention due to its greater potential for structural applications [12].…”

Section: Introductionmentioning

confidence: 99%

A Novel Lap-Butt Joint Design for FSW of Aluminum to Steel in Tee-Configuration: Joining Mechanism, Intermetallic Formation, and Fracture Behavior

Beygi,

Talkhabi,

Mehrizi

et al. 2023

Metals

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The development of new joint configurations suitable for dissimilar materials enables a wider range of applications and allows for an accelerated replacement of traditional structural construction materials by lightweight materials. The T-configuration is a joint configuration that has not been sufficiently studied for use with dissimilar materials, especially when created using the friction stir welding (FSW) process. In this study, a combined lap/butt design was introduced and implemented, seeking to create a T-joint between aluminum and steel. Characterization of the joints showed that FSW could be successfully used to join aluminum and steel in a T-configuration. The formation of intermetallic bonds and kissing bonds was carefully analyzed, and their contribution to the fracture behavior during loading in the skin and stringer directions was studied. Finite element simulation was used to determine the stress state at the interface during loading. The characterization results showed that the intermetallic, as an indicator of metallurgical bonding, is formed when special features are observed in the pattern of material flow. The fractography images showed that the stress state has a major impact on the fracture. The results of the present study can be effectively used to design and fabricate dissimilar joints, taking into account the loading condition.

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Effect of Tool Offset on the Microstructure and Properties of AA6061/AZ31B Friction Stir Welding Joints

Cited by 9 publications

References 20 publications

Effect of Ni interlayer on microstructure and mechanical properties of Al/Mg dissimilar friction stir welding joints

Effect of Ni interlayer on microstructure and mechanical properties of Al/Mg dissimilar friction stir welding joints

Influences of Welding Parameters on Friction Stir Welding of Aluminum and Magnesium: A Review

A Novel Lap-Butt Joint Design for FSW of Aluminum to Steel in Tee-Configuration: Joining Mechanism, Intermetallic Formation, and Fracture Behavior

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