Flux-less direct soldering of aluminum by ultrasonic surface activation

Hashemabad, Somayeh Gheybi; Gu, Zhiyong; Ando, Teiichi

doi:10.1016/j.jmatprotec.2016.02.015

Cited by 21 publications

(5 citation statements)

References 18 publications

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“…When ultrasonic was applied, Ti fragments were formed and stirred into the Al alloy, forming a mixed zone beside the interface. This was considered due to the ultrasonic erosion effect, which was in accordance with former studies [24-26]. Pores were also observed in the Al alloy, and this was attributed to the turbulent plastic flows which were introduced by ultrasonic and Ti fragments.…”

Section: Resultssupporting

confidence: 88%

Effects of ultrasonic on friction stir Al–Ti welds: a comparative study

Zhao

Fei

et al. 2021

Science and Technology of Welding and Joining

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Ultrasonic assisted friction stir welding (UaFSW) and conventional friction stir welding (FSW) were conducted on AA6061 and Ti6Al4V alloys. Smaller waves and larger flashes were obtained by UaFSW with 20 kHZ frequency and 10 μm amplitude ultrasonics, and the stir zone was expanded as compared to the FSW one. Interfacial micro-cracks were eliminated with the ultrasonic assistance while a mixed zone was formed beside the Al/Ti interface, containing Ti fragment and intermetallic precipitates. As a mixed zone formed with ultrasonics, the UaFSW weld showed doubled strength in the lap shear tests, as compared to the FSW weld. Cracks propagated in the mixed zone weld of the UaFSW weld, whereas propagated along the Al/Ti interface for the FSW weld.

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Section: Resultssupporting

confidence: 88%

Effects of ultrasonic on friction stir Al–Ti welds: a comparative study

Zhao

Fei

et al. 2021

Science and Technology of Welding and Joining

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“…It is crucial to first acquire the best wettability and spread-ability of the used solders in order to enable capillary phenomena and a tight filling of the soldering gap with liquid solder [6]. As a result, the choice of solders and fluxes, two auxiliary materials for flame soldering, has a significant impact on the quality of a soldered joint [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Deep Etching Surface Treatment to The Tensile Strength and Microstructure of Brazing Aluminium - Mild Steel

Anggono,

Darmawan,

Yulianto

et al. 2024

J. Phys.: Conf. Ser.

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Since hard metals are among the materials that liquid brazing alloys scarcely adhere to, they should not be brazed without first removing the surface layer after sintering. The electrolytic etching method, which gives the surfaces of materials that are hardly wettable very good energetic qualities, is given specific attention. Deep etching is done by using a high concentration of acid solution to roughen the surface. Both dry and wet settings are suitable for etching. An etching fluid is used for etching in a wet environment. Typically, the plate or metal is submerged in an etching solution, where the substance is chemically broken down. While in dry etching, the plasma’s gas phase is where the etching takes place. Due to the presence of plasma in this situation, the etching process that takes place combines chemical and physical processes. Plasma etching is another name for dry etching. Deep etching is an etching process to obtain a rougher surface. Wet deep etching requires a longer immersion time and even several immersions are required. The purpose of this study was to determine the effect of etching treatment in the brazing process of Aluminium-Mild steel for its microstructure and mechanical properties. The specimens in this study used aluminium 6000 series, mild steel, Alusol ER4043, and etching fluid. Mild steel surfaces are deep etched before brazing. Specimen manufacturing standard refers to ASTM D1002. A micro photo test was conducted to compare the surface conditions of aluminium and mild steel with and without etching treatment. The deep etching process is carried out in three variations of time, namely 20, 30, and 40 minutes. The results showed that the tensile strength increased with deep etching treatment on the surface.

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“…Several other fluxless methods for soldering aluminium alloys have been investigated. Gheybi Hashemabad et al [12] soldered aluminium alloys at a low temperature using preflow abrasion to remove the oxide film. Wan et al [13] soldered aluminium foam materials by self-abrasion.…”

Section: Introductionmentioning

confidence: 99%

Fluxless soldering of 7034 aluminium in air using protective liquid Ga coatings

Luan

Xia

Leng

et al. 2022

Materials Science and Technology

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Fine-grained 7034 aluminium alloys were soldered with Zn–5Al filler metals, using liquid Ga as protective coatings to remove oxide films of the base and filler metals and prevent secondary oxidation. Holding times and coating modes were adjusted by experiments. Applying the Ga coating on both the base and filler metals caused the Ga enrichment in the α-Al particles and the formation of Mg2Ga5 intermetallic compound at the bonding interface, deteriorating joint mechanical performance. Ga enrichment was prevented by applying the coating on the filler metal alone, which avoided the early contact of Ga with Al substrate and reduced the mass of Ga in the joint. The tensile strength increased significantly to 159∼185 MPa with a sufficient holding time.

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Flux-less direct soldering of aluminum by ultrasonic surface activation

Cited by 21 publications

References 18 publications

Effects of ultrasonic on friction stir Al–Ti welds: a comparative study

Effects of ultrasonic on friction stir Al–Ti welds: a comparative study

Influence of Deep Etching Surface Treatment to The Tensile Strength and Microstructure of Brazing Aluminium - Mild Steel

Fluxless soldering of 7034 aluminium in air using protective liquid Ga coatings

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