Microstructure and mechanical properties of weld-bonded and resistance spot welded magnesium-to-steel dissimilar joints

Xu, Wei; Chen, D.L.; Liu, L.; Mori, Hisashi; Zhou, Yunhong

doi:10.1016/j.msea.2011.12.096

Cited by 70 publications

(36 citation statements)

References 58 publications

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“…It removed the initial oxides or impurities from the surface of two materials, which were also described in many early reports [4,32]. The existence of such oxide film was detrimental in other connection methods such as resistance welding [33] or diffusion bonding [34], as it could decrease the bond strength of joints. In order to discuss the distribution of elements across the bonding interface, the representative concentration profiles of Fe, Cr, Ni in the 2205 stainless steel and Mg, Al in the AZ31B are shown in Figure 8.…”

Section: Morphology Near the Interfacementioning

confidence: 88%

Microstructural Characteristics and Mechanical Properties of 2205/AZ31B Laminates Fabricated by Explosive Welding

2017

Metals

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Abstract:A bimetal composite of 2205 duplex stainless steel and AZ31B magnesium alloy was cladded successfully through the method of explosive welding. The microstructural characteristics and mechanical properties of 2205/AZ31B bimetal composite are discussed. The interface of 2205/AZ31B bimetallic composite was a less regular wavy morphology with locally melted pockets. Adiabatic shear bands occurred only in the AZ31B side near explosive welding interface. The microstructure observed with EBSD showed a strong refinement near the interface zones. Line scan confirmed that the interface had a short element diffusion zone which would contribute to the metallurgical bonding between 2205 duplex stainless steel and AZ31B magnesium alloy. The value of micro-hardness near the bonding interface of composite plate increased because of work hardening and grain refinement. The tensile shear strength of bonding interface of 2205/AZ31B composite was 105.63 MPa. Tensile strength of 2205/AZ31B composite material was higher than the base AZ31B. There were two abrupt drops in stress in the stress-strain curves of the 2205/AZ31B composite materials.

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Section: Morphology Near the Interfacementioning

confidence: 88%

Microstructural Characteristics and Mechanical Properties of 2205/AZ31B Laminates Fabricated by Explosive Welding

2017

Metals

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“…Work on magnesium RSW dissimilar joints have mainly focused on Mg-to-steel and Mg-to-aluminum, as they are the dominant metals in automobile body fabrication [12,13].…”

Section: Introductionmentioning

confidence: 99%

Fatigue characterization and modeling of AZ31B magnesium alloy spot-welds

Behravesh

Jahed

Lambert

2014

International Journal of Fatigue

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Cyclic behavior of AZ31B spot-welds was studied using different specimen configurations, and compared with steel and aluminum spot-welds. Fatigue strength of magnesium spot-welds was similar to aluminum and less than steel. Three failure modes were observed in tensile-shear specimens and one mode of failure in cross-tension specimens. Fatigue crack initiation life was 50% and 30% of the total life for tensile-shear and cross-tension specimens, respectively. A number of available fatigue models were assessed by predicting fatigue life of magnesium spot-welds. Although these models do not account for the asymmetric cyclic hardening behavior, some of them performed successfully for magnesium spotwelds.

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“…Assim, aumenta-se a ductilidade e a vida útil da junta em fadiga, além de geralmente melhorar sua resistência à corrosão [16]. Xu et al [17] investigaram o efeito da tecnologia weld-bonding em juntas dissimilares de AZ31 e aço HSLA unidas através de soldagem pontual por resistência. Com a tecnologia weld-bonding, o alongamento na ruptura das juntas apresentou-se nove vezes superior, enquanto que a vida em fadiga triplicou em relação às juntas unidas unicamente pela soldagem pontual por resistência.…”

Section: Influência Da Espessura Do Filme Polimérico Intermediário Naunclassified

Influência da Espessura do Filme Polimérico Intermediário na Resistência Mecânica de Juntas Híbridas de Alumínio 2024-T3 e CF-PPS Produzidas por União Pontual por Fricção

et al. 2016

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado. ). Para o filme mais fino, a extensão do amolecimento devido ao calor friccional é maior. Consequentemente, a baixa viscosidade atingida com a fusão do polímero favorece a molhabilidade das superfícies dos componentes da junta pelo PPS amolecido, resultando em melhor adesão entre as partes. Ademais, análises microestruturais demonstraram que a formação do cerne metálico e a interdifusão das moléculas de PPS entre compósito e filme também são favorecidas. Portanto, concluiu-se que a adição do filme mais fino produziu juntas mais resistentes. Palavras-chave:União pontual por fricção; Estruturas híbridas; Filme intermediário; Resistência mecânica. Influence of the Interlayer Film Thickness on the Mechanical Performance of AA2024-T3/CF-PPS Hybrid Joints Produced by Friction Spot JoiningAbstract: Friction Spot Joining (FSpJ) is an innovative friction-based joining technique for metalpolymer hybrid structures. Friction spot joints of aluminum alloy 2024-T3 and carbon-fiber reinforced poly(phenylene sulfide) composite laminate (CF-PPS) were produced with an additional PPS film interlayer. Two different film thicknesses were investigated in this study: 100 and 500 µm. Lap shear testing demonstrated that the joints produced with 100 µm film (2093 ± 180 N) were stronger than the joints with 500 µm (708 ± 69 N). Additionally, the fracture surface analysis revealed a larger bonding area for the joints with 100 µm film (53 ± 2 mm 2 ) as compared to the joints with 500 µm film (40 ± 1 mm 2 ). Considering the low thermal conductivity of PPS, the thinnest film is more likely to soften by the frictional heat during the joining process. Hence, the low viscosity of the molten PPS favors the wettability of the parts' surface. Microstructural analyses proved that the metallic nub formation and the interdiffusion of PPS chains between film and composite matrix are also favored for thinner film use. Thus, superior adhesion between the partners is achieved. Therefore, it was concluded that the addition of the thinnest film interlayer leads to stronger joints.

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Microstructure and mechanical properties of weld-bonded and resistance spot welded magnesium-to-steel dissimilar joints

Cited by 70 publications

References 58 publications

Microstructural Characteristics and Mechanical Properties of 2205/AZ31B Laminates Fabricated by Explosive Welding

Microstructural Characteristics and Mechanical Properties of 2205/AZ31B Laminates Fabricated by Explosive Welding

Fatigue characterization and modeling of AZ31B magnesium alloy spot-welds

Influência da Espessura do Filme Polimérico Intermediário na Resistência Mecânica de Juntas Híbridas de Alumínio 2024-T3 e CF-PPS Produzidas por União Pontual por Fricção

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