Microstructural Investigations of Low Temperature Joining of Q&amp;P Steels Using Ag Nanoparticles in Combination with Sn and SnAg as Activating Material

Hausner, Susann; Wagner, Martin F.‐X.; Wagner, Guntram

doi:10.3390/app9030539

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…Realized or not, it is also one of the key elements in traditional macro-welding technologies. Recently, this is being widely used in micro-and nanoscales to develop new joining processes, ranging from nanodevices [28] to electronic packaging [29,30], soldering [31] to light alloy (Ti, Al) [32,33], and high-strength steel joining [34]. The goal of design strategy is to meet the performance requirements of as-fabricated joints through the proper determination of the necessary number of IMCs, layered structures, phases, intrinsic properties of used materials (e.g., hardness, grain size, etc.…”

Section: Micro/nanoscale Joined Interfacesmentioning

confidence: 99%

“…High-temperature welding might change the phase and composition of materials (for example, low-temperature partitioned quenching and partitioning (Q&P) steel), and cause property degradation. Hausner et al [34] used Sn or SnAg (Ag nanoparticles with an Sn sandwich filler) to lower the joining temperature to 237 • C with an unchanged microstructure of the Q&P steel.…”

Section: Micro/nanoscale Joined Interfacesmentioning

confidence: 99%

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Joining Technology Innovations at the Macro, Micro, and Nano Levels

Janczak‐Rusch

Sano

2019

Applied Sciences

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With the growing joining requirements of emergent engineering materials and new applications, conventional welding continues to evolve at all scales spanning from the macrodown to the micro-and nanoscale. This mini review provides a comprehensive summary of the research hot spots in this field, which includes but is not limited to selected papers from the international nanojoining and microjoining conference (NMJ) held in Nara, Japan on 1-4 December 2018. These innovations include the integration of nanotechnology, ultrafast laser, advanced manufacturing, and in situ real-time ultra-precision characterization into joining processes. This special issue may provide a relatively full picture of the state-of-the-art research progress, fundamental understanding, and promising application of modern joining technologies.

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Section: Micro/nanoscale Joined Interfacesmentioning

confidence: 99%

Section: Micro/nanoscale Joined Interfacesmentioning

confidence: 99%

Joining Technology Innovations at the Macro, Micro, and Nano Levels

Janczak‐Rusch

Sano

2019

Applied Sciences

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Nanojoining with Ni Nanoparticles for Turbine Applications

Awayes

Reinkensmeier

Wagner

et al. 2021

J. of Materi Eng and Perform

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Thermal joining can lead to high thermal stresses, undesired structural changes, and the associated loss of properties. In the turbine industry, monocrystalline materials are often used to take advantage of their high creep resistance and heat resistance. For process-related reasons, components are mechanically machined, and the contours usually have slightly work-hardened areas due to the mechanical processing. Downstream thermal processes at temperatures above 1100°C can lead to recrystallization (Rx) at these areas, so that the properties are negatively affected. Usually, the joining temperatures for high-temperature brazing are in the range of 1200°C, both in new installations and in the case of repairs. It is therefore desirable to reduce the joining temperature without changing the choice of filler material, which can lead to susceptibility to corrosion and oxidation. According to investigations of the last years, nanojoining with nanoparticles offers great potential. The joining temperature can be lowered due to the ''surface effect.'' A considerable reduction in the size of the particles leads to a significant increase in surface atoms and thus in the specific surface area. The connection of the materials occurs predominantly due to sintering processes. After the joining process, the properties of a bulk material are available again. Mechanical properties comparable to those of brazing have already been achieved with silver nanoparticles (Hausner in WWA 56, 2015). Up to now, publications on the topic of nanojoining have largely referred to silver nanoparticles/ silver sintering. Due to the temperature application range, silver filler material cannot be used in gas turbines. Therefore, the first results of nickel nanoparticles for joining of the nickel-based superalloy PWA 1483 using induction heating are described in this paper. During joining, the parameters brazing temperature, holding time and the surface treatment of the base materials were varied. It becomes clear that the microstructure of the joint is dependent on temperature and holding time. Moreover, if the temperature is too low and holding time too short, only insufficiently sintering occurs, which leads to sample failure during the metallographic preparation. On the other hand, samples with a tensile shear strength of up to 165 MPa can be achieved with convenient joining conditions.

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Microstructural Investigations of Low Temperature Joining of Q&P Steels Using Ag Nanoparticles in Combination with Sn and SnAg as Activating Material

Cited by 2 publications

References 27 publications

Joining Technology Innovations at the Macro, Micro, and Nano Levels

Joining Technology Innovations at the Macro, Micro, and Nano Levels

Nanojoining with Ni Nanoparticles for Turbine Applications

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