Induction Welding of Metal/Composite Hybrid Structures

Didi, Mirja; Mitscháng, Peter

doi:10.1002/9781119429807.ch4

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…Before designing a bimetallic laminate and its production procedure, its intended application should be considered, as the selected component metals and designed volume ratio and stacking sequence influence the final properties of the laminate. The production methods using elevated/high temperatures (e.g., cladding or welding [41][42][43][44][45]) are not very advantageous since they introduce temperature inhomogeneity, which can deteriorate the structures (e.g., by introducing precipitation, the formation of intermetallics, or undesirable grain growth) and, consequently, the mechanical properties of the bimetallic laminate (despite the fact that they provide a sufficient bonding strength) [46]. Therefore, the production of Al + Cu bimetallic laminates under cold conditions, i.e., via intensive/severe deformation processing, is promising [47,48].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Thermomechanical Processing of Bimetallic Laminates

Kocich

2023

Materials

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Thermomechanical processing combining plastic deformation and heat treatment is a favorable way to enhance the performance and lifetime of bimetallic laminates, especially those consisting of metals, which tend to form intermetallic layers on the interfaces when produced using methods involving increased temperatures. The presented work focuses on optimizing the conditions of thermomechanical treatment for an Al + Cu bimetallic laminate of innovative design involving a shear-strain-based deformation procedure (rotary swaging) and post-process heat treatment in order to acquire microstructures providing advantageous characteristics during the transfer of direct and alternate electric currents. The specific electric resistivity, as well as microhardness, was particularly affected by the structural features, e.g., grain size, the types of grain boundaries, and grain orientations, which were closely related to the applied thermomechanical procedure. The microhardness increased considerably after swaging (up to 116 HV02 for the Cu components), but it decreased after the subsequent heat treatment at 350 °C. Nevertheless, the heat-treated laminates still featured increased mechanical properties. The measured electric characteristics for DC transfer were the most favorable for the heat-treated 15 mm bimetallic laminate featuring the lowest measured specific electric resistivity of 22.70 × 10−9 Ωm, while the 10 mm bimetallic laminates exhibited advantageous behavior during AC transfer due to a very low power loss coefficient of 1.001.

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Section: Introductionmentioning

confidence: 99%

Optimizing Thermomechanical Processing of Bimetallic Laminates

Kocich

2023

Materials

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“…Depending on the respective design, all methods are able to generate the necessary heat within the low-second or even sub-second range. Advantages of inductive heat generation are joining without damaging the metal surface like friction based or ultrasonic methods, easy integration into joining tools as well as low investment costs [21]. The susceptor that is needed for absorbing the electromagnetic energy can be integrated into the polymer [18,19,22,23].…”

Section: Introductionmentioning

confidence: 99%

“…Another advantage of thermally sprayed coatings is the ability to use a wide range of materials. By using a ferromagnetic metal with high permeability, the coating can also serve as susceptor in addition to its purpose as adhesion promoter since joule heating caused by induced eddy currents as well as hysteresis losses lead to an acceleration of the inductive heating process [21].…”

Section: Introductionmentioning

confidence: 99%

Nickel-Aluminum Thermal Spray Coatings as Adhesion Promoter and Susceptor for Inductively Joined Polymer-Metal Hybrids

et al. 2021

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Hybrid joints of metal- and fiber-reinforced-polymer offer great potential for lightweight applications. Thereby, a fast and reliable joining process is mandatory for mass-production applications. To this end, this study assesses inductive spot-joining in combination with prior thermal spray coating of the metal adherent. A nickel–aluminum 95/5 coating was applied to achieve high adhesion through mechanical interlocking and to act as susceptor for the inductive joining process. The joint strength was assessed with lap shear specimens consisting of EN AW-6082 aluminum alloy and glass fiber reinforced polyamide 6 or polypropylene, respectively. The joints were further investigated in terms of heating time and hygrothermal cyclic loading. The results showed that significant time savings for the joining process as well as strong adhesion were achieved due to the coating. Moreover, the high strengths were even preserved under hygrothermal cyclic loading.

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Induction Welding of Metal/Composite Hybrid Structures

Cited by 2 publications

References 8 publications

Optimizing Thermomechanical Processing of Bimetallic Laminates

Optimizing Thermomechanical Processing of Bimetallic Laminates

Nickel-Aluminum Thermal Spray Coatings as Adhesion Promoter and Susceptor for Inductively Joined Polymer-Metal Hybrids

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