Residual stresses in ceramic-to-metal joints: diffraction measurements and finite element method analysis

Vila, M.; Prieto, C.; Viñuela, Jorge Zahr; Pérez-Castellanos, J.L.; Bruno, Giovanni; Jiménez‐Ruiz, Mónica; Miranzo, P.; Osendi, M.I.

doi:10.1080/14786430701673436

Cited by 8 publications

(6 citation statements)

References 17 publications

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“…This is also typical for stress profiles across heterogeneous junctions (see e.g. [45]). The RS rapidly decreases from the transition zone (WAAM/substrate) to the bottom of the substrate.…”

Section: Resultssupporting

confidence: 52%

“…There is some consensus that high tensile stress appears in the region near the substrate and constantly decreases to compressive towards the top of the sample (see schematic in Figure 12c). This is also typical for stress profiles across heterogeneous junctions (see e.g., [45]). The RS rapidly decreases from the transition zone (WAAM/substrate) to the bottom of the substrate.…”

Section: Resultssupporting

confidence: 52%

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Residual Stress and Microstructure of a Ti-6Al-4V Wire Arc Additive Manufacturing Hybrid Demonstrator

Mishurova

Sydow

Thiede

et al. 2020

Metals

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Wire Arc Additive Manufacturing (WAAM) features high deposition rates and, thus, allows production of large components that are relevant for aerospace applications. However, a lot of aerospace parts are currently produced by forging or machining alone to ensure fast production and to obtain good mechanical properties; the use of these conventional process routes causes high tooling and material costs. A hybrid approach (a combination of forging and WAAM) allows making production more efficient. In this fashion, further structural or functional features can be built in any direction without using additional tools for every part. By using a combination of forging basic geometries with one tool set and adding the functional features by means of WAAM, the tool costs and material waste can be reduced compared to either completely forged or machined parts. One of the factors influencing the structural integrity of additively manufactured parts are (high) residual stresses, generated during the build process. In this study, the triaxial residual stress profiles in a hybrid WAAM part are reported, as determined by neutron diffraction. The analysis is complemented by microstructural investigations, showing a gradient of microstructure (shape and size of grains) along the part height. The highest residual stresses were found in the transition zone (between WAAM and forged part). The total stress range showed to be lower than expected for WAAM components. This could be explained by the thermal history of the component.

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“…This is also typical for stress profiles across heterogeneous junctions (see e.g. [45]). The RS rapidly decreases from the transition zone (WAAM/substrate) to the bottom of the substrate.…”

Section: Resultssupporting

confidence: 52%

Section: Resultssupporting

confidence: 52%

Residual Stress and Microstructure of a Ti-6Al-4V Wire Arc Additive Manufacturing Hybrid Demonstrator

Mishurova

Sydow

Thiede

et al. 2020

Metals

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“…The relationship between the fracture stress and the unjoined area of the solidstate bonded Al 2 O 3 /Nb joint are shown in Figure 7. Apparently, the increase in unjoined area decreases the strength of the specimen [33].…”

Section: Pores and Unbonded Areas On Interfacementioning

confidence: 95%

Current Issues and Problems in the Joining of Ceramic to Metal

Uday¹,

Ahmad-Fauzi²,

Noor³

et al. 2016

Joining Technologies

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Ceramics and metals are two of the oldest established classes of technologically useful materials. While metals dominate engineering applications, ceramics have some attractive properties compared to metals, which make them useful for specific applications. The properties of individual ceramics and metals can vary widely; however, the characteristics of most materials in the two classes differ significantly. Joints between a metal and ceramic are becoming increasingly important in the manufacturing of a wide variety of technological product. But joining ceramics to metallic materials often remains an unresolved or unsatisfactorily resolved problem. This chapter deals with problems of various studies in recent years on the joining between two materials.

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“…Residual stresses in joints have been assessed by X-Ray Diffraction (XRD) [136] and neutron diffraction [132,133,137] (it is noteworthy that stresses within filler metal layers of normal thickness have not yet been resolved due to the size of sampling volume). For joints between plates which are sufficiently thin to bend under the residual stresses, the induced curvature can be used to gauge the stress level [130], or, where the interface can be accessed, the difference in crack length generated by indentation in a stress free region and that in a region with residual stresses can be used as a measure [138].…”

Section: Brazing Alloys Designed To Mitigate Residual Stressmentioning

confidence: 99%

Brazing filler metals

Way

Willingham

Goodall

2019

International Materials Reviews

101

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Brazing is a 5000-year-old joining process which still meets advanced joining challenges today. In brazing, components are joined by heating above the melting point of a filler metal placed between them; on solidification a joint is formed. It provides unique advantages over other joining methods, including the ability to join dissimilar material combinations (including metal-ceramic joints), with limited microstructural evolution; producing joints of relatively high strength which are often electrically and thermally conductive. Current interest in brazing is widespread with filler metal development key to enabling a range of future technologies including; fusion energy, Solid Oxide Fuel Cells and nanoelectronics, whilst also assisting the advancement of established fields, such as automotive lightweighting, by tackling the challenges associated with joining aluminium to steels. This review discusses the theory and practice of brazing, with particular reference to filler metals, and covers progress in, and opportunities for, advanced filler metal development.

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Residual stresses in ceramic-to-metal joints: diffraction measurements and finite element method analysis

Cited by 8 publications

References 17 publications

Residual Stress and Microstructure of a Ti-6Al-4V Wire Arc Additive Manufacturing Hybrid Demonstrator

Residual Stress and Microstructure of a Ti-6Al-4V Wire Arc Additive Manufacturing Hybrid Demonstrator

Current Issues and Problems in the Joining of Ceramic to Metal

Brazing filler metals

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