Characterization of intermetallic compound at the interfaces of Al-steel resistance spot welds

Wan, Zixuan; Wang, Huiping; Chen, Nannan; Wang, Min; Carlson, Blair E.

doi:10.1016/j.jmatprotec.2016.11.017

Cited by 103 publications

(35 citation statements)

References 13 publications

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“…On the contact surface, however, besides the zones of ductile fracture, there were also zones where only the galvanized sheet was wetted, and zones of exposed shrinkage porosity and tears that occurred during the fast solidification and cooling of the molten metal of the joining element. The analysis of the fracture surface between the aluminum alloy joining element and the galvanized steel sheet corresponds, from macro-and microstructural points of view, to the results published so far in works [18][19][20]. The thickness of the interfacial IMC layer between the AlSi5 joining element and the galvanized steel sheet with the occurrence of intermetallic compounds of the Fe x Al y type was about 1 µm.…”

Section: Discussionsupporting

confidence: 64%

Joining of galvanized steel sheets and aluminum by REW technology using AlSi5 joining elements

Sejč¹,

Gábrišová²,

Vanko³

et al. 2020

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In the present work, innovative resistance element welding (REW) technology is introduced for the joining of galvanized steel sheets to aluminum. The essence of the innovation was the use of an Al alloy joining element, which is suitable filler metal for brazing galvanized steel sheets and arc welding aluminum alloys.Analysis of the joint structure shows that the use of suitable resistance heating parameters (current, time, force) results in a brazed joint between the face of the joining element and the steel sheet, and a welded joint between the joining element and the aluminum sheet. The strength of the obtained joints is equal to that of the joining element made of AlSi5 aluminum alloy.K e y w o r d s : resistance element welding, steel/aluminum joints, joining element, properties, structure

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Section: Discussionsupporting

confidence: 64%

Joining of galvanized steel sheets and aluminum by REW technology using AlSi5 joining elements

Sejč¹,

Gábrišová²,

Vanko³

et al. 2020

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“…As a result, the strength of the weld reduces significantly. Therefore, the IMC layer thickness is one of the important factors to determine the bond strength of weld 91) . A thinner IMC layer can improve the strength of the weld 38) .…”

Section: Steel-aluminum Weldingmentioning

confidence: 99%

A Review on Welding of Dissimilar Metals in Car Body Manufacturing

Karim

Park

2020

Journal of Welding and Joining

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This paper presents a comprehensive study of the metallurgical challenges of welding dissimilar metals. It also describes the important factors in dissimilar welding which need to be considered for automotive applications. It further investigates effective approaches to overcome these present challenges. Steels, aluminum alloys, and magnesium alloys are widely used metals in car bodies. However, it is difficult to weld these dissimilar metals and achieve good joint quality, due to their inherent disparate properties. The formation of brittle, crack sensitive and corrosion susceptible intermetallic phases is the main obstacle to dissimilar weld quality. Various approaches have been attempted by many researchers to enhance the performance of dissimilar welds. The most notable efforts include the application of interlayers, cover plate, least heat input, a combination of welding and mechanical joining, and alloying elements of filler metals. Based on considerations of joint performance, production cost and time, present industry infrastructure, and so on, the most effective and feasible approaches were identified which required the least amount of heat input, and the appropriate filler metal alloying elements.

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“…Do mesmo modo, um processo de soldagem apresenta três conjuntos de parâmetros principais de regulagem, sendo eles: Corrente de soldagem, tempo de soldagem e força, ou pressão, do eletrodo. Estes parâmetros de controle estão presentes em diversos trabalhos que utilizam a RSW, tais como: [45][46][47][48][49][50][51][52][53][54][55][56][57]. Conhecer os fatores controláveis e incontroláveis do processo, bem como configurar adequadamente os parâmetros para a realização do processo de soldagem, favorecem para garantir um bom produto soldado, uma vez que esses fatores impactam na sua geometria e qualidade final [58].…”

Section: Figuraunclassified

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

Almeida

Gomes

et al. 2018

Soldag. insp.

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Resumo Neste estudo, buscou-se analisar a variabilidade de instrumentos utilizados na indústria para avaliar as características geométricas de um ponto de solda. Para tal, inicialmente, utilizou-se da técnica de planejamento de experimentos para gerar um arranjo fatorial fracionado para as configurações dos parâmetros de soldagem em corpos de prova de aços galvanizados por imersão a quente, a fim de representar a amplitude real do processo de soldagem por pontos. Para as análises, utilizou-se o estudo de repetitividade e reprodutibilidade (GR&R), pelo método de análise de variância, para identificar os componentes de variação do sistema de medição avaliando três instrumentos distintos, comparando as medições realizadas por um analisador de imagens, a partir do ensaio metalográfico, e métricas de instrumentos convencionais de metrologia como o relógio apalpador e o paquímetro manual. Foram avaliadas duas características da qualidade, sendo elas: a profundidade de indentação e o diâmetro do ponto. A partir dos resultados foi possível verificar que o analisador de imagem apresentou uma menor variabilidade nas medições, caracterizando-se como a melhor escolha para as medições das respostas de qualidade do processo de solda por pontos apresentando um GR&R classificado como aceitável.

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Characterization of intermetallic compound at the interfaces of Al-steel resistance spot welds

Cited by 103 publications

References 13 publications

Joining of galvanized steel sheets and aluminum by REW technology using AlSi5 joining elements

Joining of galvanized steel sheets and aluminum by REW technology using AlSi5 joining elements

A Review on Welding of Dissimilar Metals in Car Body Manufacturing

Análise das Causas de Variação Atribuídas a Diferentes Instrumentos Metrológicos para Verificação das Características Geométricas de um Processo de Soldagem por Pontos

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