Niendorf, T.; Krooß, P.; Somsen, C.; Rynko, R.; Paulsen, A. et al.: Cyclic degradation of titanium-tantalum high-temperature shape memory alloys - The role of dislocation activity and chemical decomposition. In: Functional Materials Letters 8 (2015), Nr. 6, 1550062. DOI:
https://doi.org/10.1142/S1793604715500629
Zusammenfassung: |
Titanium-tantalum shape memory alloys (SMAs) are promising candidates for actuator applications at elevated temperatures. They may even succeed in substituting ternary nickel-titanium high temperature SMAs, which are either extremely expensive or difficult to form. However, titanium-tantalum alloys show rapid functional and structural degradation under cyclic thermo-mechanical loading. The current work reveals that degradation is not only governed by the evolution of the ω-phase. Dislocation processes and chemical decomposition of the matrix at grain boundaries also play a major role.
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Lizenzbestimmungen: |
CC BY 4.0 Unported - https://creativecommons.org/licenses/by/4.0/
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Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2015 |
Schlagwörter (englisch): |
decomposition, Microstructure, phase transformation, training, ω-phase, Alloys, Grain boundaries, Shape memory effect, Tantalum, Titanium, Chemical decomposition, Cyclic degradations, Dislocation activity, Elevated temperature, High temperature, High temperature shape memory alloy, Structural degradation, Thermo-mechanical loading
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Fachliche Zuordnung (DDC): |
600 | Technik
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