Friction stir girth welding between aluminum and steel rods

Yasui, Toshiaki; Tian, Wenbin; Hanai, Atsuhiro; Mori, T.; Hirosawa, Katashi; Fukumoto, Masahiro

doi:10.1016/j.promfg.2018.07.345

Cited by 14 publications

(10 citation statements)

References 13 publications

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“…Although brazing has the advantages of a smaller joint deformation and less IMCs generation than fusion welding, defects such as slags and porosities are easily produced because of the filler material. In order to improve the reliability of the welded joint, solid-state welding is preferred for Al/steel dissimilar metals [9].…”

Section: Introductionmentioning

confidence: 99%

Diffusion Bonding of Al-Mg-Si Alloy and 301L Stainless Steel by Friction Stir Lap Welding Using a Zn Interlayer

Dong

Liu

et al. 2022

Materials

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Friction stir lap welding (FSLW) is expected to join the hybrid structure of aluminum alloy and steel. In this study, the Al-Mg-Si aluminum alloy and 301L stainless steel were diffusion bonded by FSLDW with the addition of 0.1 mm thick pure Zn interlayer, when the tool pin did not penetrate the upper aluminum sheet. The characteristics of lap interface and mechanical properties of the joint were analyzed. Under the addition of Zn interlayer, the diffusion layer structure at lap interface changed from continuous to uneven and segmented. The components of the diffusion layer were more complex, including Fe-Al intermetallic compounds (IMCs), Fe-Zn IMCs and Al-Zn eutectic. The largely changed composition and thickness of uneven and segmented diffusion layer at the lap interface played a significant role in the joint strength. The tensile shear load of Zn-added joint was 6.26 kN, increasing by 41.3% than that of Zn-not-added joint. These two joints exhibited interfacial shear fracture, while the Zn interlayer enhanced the strength of diffusion bonding by extending the propagation path of cracks.

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Section: Introductionmentioning

confidence: 99%

Diffusion Bonding of Al-Mg-Si Alloy and 301L Stainless Steel by Friction Stir Lap Welding Using a Zn Interlayer

Dong

Liu

et al. 2022

Materials

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“…Therefore, the offset defines the position of the tangent of the pin to the joint line, being positive when it enters steel and negative when the pin is entirely in aluminum [22,23]. From these recommendations, Yasui [24] obtained welded joints AA6063-steel, where he related the effect of υ and ꞷ with the plastic flow and the formation of defects, similar to what happened when welding joints of the same metal.…”

Section: Introductionmentioning

confidence: 93%

“…The majority of papers on the subject mention such fragments without going into greater detail [25]. Several works point to the formation of intermetallic compounds (IMC) around steel particles [26], while others evaluate their effect on the response to corrosion of the joint [27], being that the increment in the number of fragments significantly increases the corrosion rate [23][24][25][26][27][28]. It should be noted that different strategies have been presented to investigate the flow of material during FSW, such as insertion of markers, three-dimensional analysis using X-ray tomography or X-ray radiography in situ, use of different materials, the use of plasticine, and applied freezing after the pin breaks [29].…”

Section: Introductionmentioning

confidence: 99%

Control of Steel Detachment and Metal Flow on Aluminum-Steel Friction Stir Welding of thin Joints

Graciano-Uribe

Santos

2021

IJE

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In the last thirty years, the friction stir welding (FSW) process has achieved significant importance due to the satisfactory results derived from severe deformation and low heat input during the welded joint production. These elements have been considered to implement the FSW in different welded systems, including aluminum-steel joints. In these dissimilar joints, the main interest was to obtain a welded joint with acceptable mechanical behavior. Some papers recently focused on understanding dissimilar joints process, mainly on the metal flow and its response to corrosion. However, in Al-steel joints, the presence of steel particles in the nugget zone is routine, it alters both the mechanical and chemical behavior of welded joints. Thus, this work aims to evaluate the mechanisms that govern these particles' generation, the effect of offset on their formation, and proposing the material flow behavior, using the detached fragments as tracers. It was established that the offset controls the metal's fluidity, which allows the accumulation of steel fragments on the advanced side, and reducing its quantity, due to the decrease of irregularities in the Al-steel interface. Likewise, the metal flow was observed on the retreating side, with that mentioned in aluminum joints. In contrast, on the advanced side, there is a shear action, push down, and lateral movement towards the retreating side, driven by the high forging strength of the metal and the restriction imposed by the steel and the backing.

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“…Diversos autores estudaram a junção dissimilar alumínio-aço pelo processo FSW, sendo que em grande parte dos projetos são usadas ferramentas especiais fabricadas pelo processo da metalurgia do pó [11][12][13][14][15][16]. Estudos realizados por Fukumoto et al [14] demonstram que a resistência da junta é maior quando a ferramenta é parcialmente inserida no lado do aço, entretanto, são verificados efeitos indesejáveis como desgaste excessivo e quebra da mesma [11].…”

Section: Introductionunclassified

Soldagem Dissimilar da Liga de Alumínio 5052 H34 e do Aço SAE 1020 pelo Processo Hybrid Friction Stir Welding Assistido por Plasma: Análise da Resistência Mecânica, do Desgaste da Ferramenta e dos Esforços de Soldagem

Cota

Bracarense

2020

Soldag. insp.

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Resumo: Esta pesquisa tratou da primeira aplicação do processo Hybrid Friction Stir Welding na soldagem dissimilar alumínio-aço com a utilização de uma fonte de pré-aquecimento por plasma. Um dos benefícios em se utilizar o pré-aquecimento da junta é a possibilidade de coalescer o material e reduzir sua resistência mecânica, viabilizando assim a utilização de ferramentas fabricadas em aço, além de tornar a mistura mais eficiente por meio da introdução da ferramenta diretamente na interface de soldagem (Offset igual a zero). Nesta pesquisa, foram realizadas juntas soldadas a topo do aço carbono SAE 1020 e da liga de alumínio 5052 H34 com 3 mm de espessura utilizando um cabeçote desenvolvido especialmente para essa aplicação, que foi adaptado a um robô antropomórfico COMAU NJ5000 de 6 graus de liberdade e capacidade de 500 kg. O pré-aquecimento das amostras foi realizado pela adaptação de uma máquina de corte a plasma, em que a temperatura e a corrente foram variadas em: 0 °C (sem pré-aquecimento), 250 °C (40 A), 350 °C (50 A) e 450 °C (60 A). O deslocamento da ferramenta (offset) foi variado em zero e -2,5 mm. Foi identificado o aumento da resistência mecânica das juntas com o aumento da temperatura de pré-aquecimento. Quando a temperatura de pré-aquecimento foi de 450 °C houve o aumento de aproximadamente 111% da resistência mecânica quando comparado ao processo sem pré-aquecimento. Foi verificado também a redução dos esforços de soldagem e do desgaste da ferramenta com o aumento da temperatura de pré-aquecimento.

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Friction stir girth welding between aluminum and steel rods

Cited by 14 publications

References 13 publications

Diffusion Bonding of Al-Mg-Si Alloy and 301L Stainless Steel by Friction Stir Lap Welding Using a Zn Interlayer

Diffusion Bonding of Al-Mg-Si Alloy and 301L Stainless Steel by Friction Stir Lap Welding Using a Zn Interlayer

Control of Steel Detachment and Metal Flow on Aluminum-Steel Friction Stir Welding of thin Joints

Soldagem Dissimilar da Liga de Alumínio 5052 H34 e do Aço SAE 1020 pelo Processo Hybrid Friction Stir Welding Assistido por Plasma: Análise da Resistência Mecânica, do Desgaste da Ferramenta e dos Esforços de Soldagem

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