Control Al/Mg intermetallic compound formation during ultrasonic-assisted soldering Mg to Al

Xu, Zhiwu; Li, Zhengwei; Li, Jiaqi; Ma, Zhipeng; Yan, Jiuchun

doi:10.1016/j.ultsonch.2018.04.010

Cited by 50 publications

(9 citation statements)

References 38 publications

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“…After ultrasonic degassing, the molten Pb 90 Sn 10 is well treated and can well be used. In the newly done experiments, the flowability of ultrasonically treated filler alloy is moving inside Si intervals at a faster speed; the texture filling rate is higher than 99.9% [13] . Meanwhile, the flowing speed of Pb-Sn when with ultrasonic excitation is more even swift, we have observed that all the pastes can be well soldered within 10 seconds.…”

Section: Test Results and Discussionmentioning

confidence: 98%

A study on the degassing mechanism of Pb-based alloy under ultrasonic treatment

Feng

Bai

et al. 2022

J. Phys.: Conf. Ser.

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In recent years, the ultrasonic technique is being developed at a pretty faster speed, whose assisting tactic has been applied in the electronic packaging field. What we need is to determine the mechanisms of ultrasonic treatments on electronic packaging fillers. In this paper, Pb-based alloy is typically chosen as the filler metal, in this paper, it is found that the flowability of which can be improved under ultrasonic vibration. Also, ultrasonic degassing efficiency is greatly promoted, with the best parameter for degassing that ultrasonic power and duration time of 1000W and 60s, a molten alloy’s treating temperature of 340°C. The assistance of ultrasonic is deeply explained from the thermodynamic aspect. Understanding of the atomic level interactions of liquid Pb atoms and vacuum is crucial, so we make an ultrasonic-assisted molecular dynamic simulation of melting Pb to room temperature to 330°C in 10ps, and the diffusion behavior of Pb atom under periodic vibration is revealed.

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Section: Test Results and Discussionmentioning

confidence: 98%

A study on the degassing mechanism of Pb-based alloy under ultrasonic treatment

Feng

Bai

et al. 2022

J. Phys.: Conf. Ser.

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“…Formation of the intermetallic layers between the interfaces of the initial plates will be unavoidable if laminated composites or welded different metal alloys have been fabricated at high temperatures or apply a preheating process. 22–25 These intermetallic compounds and their structures determine the performance of the joint. 26 In this area, Yazdani et al 27 studied the fabrication of Al-matrix nanocomposites reinforced by mono-dispersed TiAl3 intermetallic three-step process of cold-roll bonding, heat-treatment, and accumulative roll bonding.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of three-layered sandwich composite of AA1050/LZ91/AA1050 using cold roll bonding process

Rahmatabadi

Pahlavani

Marzbanrad

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this paper, for the first time, dual-phase Mg-Li alloy is used to produce a three-layered Al/Mg/Al composite with the use of the cold roll bonding process. The low density and high ductility are known as the essential advantages of the Mg-Li alloys, while a couple of important problems should be taken into account, namely low corrosion resistance and low strength. It has been tried to deal with the mentioned problems by performing cold work and cover the Mg sheet with the Al similar plates. To investigate the Mg-Al layers bonding quality, mechanical properties and microstructure were examined for different thicknesses reduction ratio. The peeling test results showed that with increasing rolling pressure, the size and number of cracks on the brittle surfaces due to brushing, surface expansion, and metal extrusion between the cracks were improved by rising the reduction thickness ratio, bond strength enhanced, sharply. The UTS of 33.33% thickness reduction three-layered Al/Mg sample was obtained 186.5 MPa, which was more than 2.1 and 1.3 times higher than the initial Al1050 and MgLZ91 samples, respectively. However, because of increasing the amount of thickness reduction, roll-bonded layers’ quality, the tensile strength of the composite, and the microhardness of both layers increased. Furthermore, the elongation has reduced, and the maximum ultimate tensile strength and microhardness were achieved at 66.67% thickness reduction.

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“…In general, this difficulty can be solved by two methods, adopting solid-state bonding process or alloying the weld seam. Friction stir welding (FSW) [ 3 , 4 , 5 , 6 , 7 , 8 ], resistance spot welding (RSW) [ 9 ], contact-reaction brazing [ 10 , 11 , 12 ], ultrasonic spot welding [ 13 , 14 , 15 ] and explosive welding [ 16 , 17 , 18 ] were employed for joining Mg–Al dissimilar metals, and the formation of IMCs was restrained by reducing the reaction temperature and reaction time of the liquid metal. However, decreasing the heat input could not completely eliminate the brittle IMCs in the joint.…”

Section: Introductionmentioning

confidence: 99%

Influence of Welding Speed on Characteristics of Non-Axisymmetric Laser-Tungsten Inert Gas Hybrid Welded Mg/Al Lap Joints with Zn Filler

Wang

Liu

2020

Materials

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A non-axisymmetric laser-tungsten inert gas (TIG) heat source was designed to join Mg–Al dissimilar metals with pure Zn filler at a series of welding speeds (500–900 mm/min). Laser and TIG heat sources respectively acted on Al and Mg base metals to precisely control their dissolution into the welding pool. The solidification rate of liquid metal was controlled by adjusting the welding speed, then the reaction process of Mg, Al and Zn could be accurately regulated. The results indicated that various microstructures including Al solid solution, Zn solid solution, Mg–Zn intermetallic compounds (IMCs) and eutectic structure formed in the joint produced at different speeds. Lower welding speed (500 mm/min) caused the microstructure coarsening and higher welding speed (900 mm/min) would lead to the enrichment of MgZn2 intermetallic compounds. At the optimal welding speed of 800 mm/min in particular, fine MgZn2 IMCs grains uniformly distributed in the Al and Zn solid solution. The tensile-shear load reached a maximum of 1052.5 N/cm and the joint fractured at the fusion zone near the Al base metal.

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Control Al/Mg intermetallic compound formation during ultrasonic-assisted soldering Mg to Al

Cited by 50 publications

References 38 publications

A study on the degassing mechanism of Pb-based alloy under ultrasonic treatment

A study on the degassing mechanism of Pb-based alloy under ultrasonic treatment

Manufacturing of three-layered sandwich composite of AA1050/LZ91/AA1050 using cold roll bonding process

Influence of Welding Speed on Characteristics of Non-Axisymmetric Laser-Tungsten Inert Gas Hybrid Welded Mg/Al Lap Joints with Zn Filler

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