Microstructural insights into creep of Ni-based alloy 617 at 700 °C provided by electron microscopy and modelling

Riedlsperger, Florian; Wójcik, Tomasz; Buzolin, Ricardo Henrique; Zuderstorfer, Gerold; Speicher, Magdalena; Sommitsch, Christof; Sonderegger, Bernhard

doi:10.1016/j.matchar.2023.112720

Cited by 6 publications

(2 citation statements)

References 57 publications

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“…Reference [15] In the future, we plan to extend the model to other materials-groups (such as Ni-based alloys, e.g. [25]). Our creep software CreeSo [26] will implement the current status of the IMK model, and is planned to be released soon.…”

Section: Summary and Discussionmentioning

confidence: 99%

Prediction of TTR Diagrams via Physically Based Creep Simulations of Martensitic 9-12% Cr-Steels

Witzmann,

Riedlsperger,

Mergl

et al. 2023

MSF

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This work deals with the prediction of time-to-rupture (TTR) diagrams of martensitic 9-12% Cr steels. Martensitic 9-12% Cr steels are state of the art materials for powerplants due to their high creep strength and oxidation resistance. Since the experimental determination of TTR diagrams is costly and time-expensive (minimum 10 years), it is of particular interest to be able to model TTR diagrams and gradually replace experiments. Here, we approach the question to what extent we can generate a TTR diagram of a material out of a fraction of experimental results plus detailed understanding of the underlying microstructural/physical phenomena during creep. Our model is based on dislocation creep and includes multiple interactions between the microstructural constituents. We show the applicability of our approach by reproducing a TTR diagram of the well-known material P92. Input parameters are basic material data from literature, the starting microstructure before creep, chemical composition, some model parameters determined on the similar material P91, and one single creep curve of P92. The precipitate evolution is simulated by the software MatCalc, the other microstructural constituents (dislocation densities, subgrain boundaries etc.) by our creep model. By varying the stress between individual creep simulations whilst keeping all input parameters (starting microstructure, temperature and material parameters) constant, we produce multiple creep curves and thus generate the complete dataset for a TTR diagram. The model is of particular interest when it comes to the development of new materials, as the application range of these materials can be estimated quickly and with good reproducibility.

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Section: Summary and Discussionmentioning

confidence: 99%

Prediction of TTR Diagrams via Physically Based Creep Simulations of Martensitic 9-12% Cr-Steels

Witzmann,

Riedlsperger,

Mergl

et al. 2023

MSF

Self Cite

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“…Currently, heat-resistant steel, Ti-based alloys, Fe-based alloy, and Ni-based alloys are used in the aerospace field, as they possess multiple properties such as hot oxidation and corrosion resistance, and remarkable mechanical properties [1,2]. The properties of these alloys affect engine properties' parameters such as engine thermal efficiency and thrust-to-weight ratio.…”

Section: Introductionmentioning

confidence: 99%

Brazing Temperature Effects on the Microstructure and Mechanical Properties of Ti-45Al-8Nb Joints Using TiZrCuNi Amorphous Interlayer

Wang,

Xu,

et al. 2024

Coatings

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Ti-45Al-8Nb alloy is widely utilized in the lightweight design of the aerospace field because of its excellent properties. In order to make full use of this alloy, it is important to carry out relevant research, such as into the joining process of Ti-45Al-8Nb alloy. In this work, Ti-45Al-8Nb alloys were successfully connected by a TiZrCuNi amorphous interlayer, which was fabricated using the rapid solidification method. Ti-45Al-8Nb joints were composed of two zones. The typical microstructure of a Ti-45Al-8Nb joint was Ti-45Al-8Nb/AlCuTi + Ti3Al/(Ti, Zr)(Cu, Ni) + (Ti, Zr)2(Cu, Ni)/Ti3Al + AlCuTi/Ti-45Al-8Nb. The diffusion of elements between the interlayer and the substrate was enhanced by increasing the brazing temperature, which resulted in an increase in the thickness of the interfacial reaction layer. The maximum shear strength was 171.2 MPa, which was obtained at 930 °C. The typical cleavage fracture was found in all of the Ti-45Al-8Nb joints. The mechanical properties of the joint were compromised at high brazing temperature due to the presence of excessive (Ti, Zr)2(Cu, Ni) phase and coarse Ti3Al phase, both of which are inherently brittle and harmful to the shear strength of the obtained joint.

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A predictive mesoscale model for continuous dynamic recrystallization

Miller Branco Ferraz,

Buzolin,

Ebenbauer

et al. 2024

International Journal of Plasticity

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Microstructural insights into creep of Ni-based alloy 617 at 700 °C provided by electron microscopy and modelling

Cited by 6 publications

References 57 publications

Prediction of TTR Diagrams via Physically Based Creep Simulations of Martensitic 9-12% Cr-Steels

Prediction of TTR Diagrams via Physically Based Creep Simulations of Martensitic 9-12% Cr-Steels

Brazing Temperature Effects on the Microstructure and Mechanical Properties of Ti-45Al-8Nb Joints Using TiZrCuNi Amorphous Interlayer

A predictive mesoscale model for continuous dynamic recrystallization

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