Effect of a single overload on the cyclic R-curve behaviour of a γ-TiAl TNM alloy
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Authors
Organisational units
External Organisational units
- Erich Schmid Institute of Materials Science
- MTU Aero Engines AG
Abstract
The effect of single overloads on the threshold of stress intensity range of a semi-brittle material, a γ-titanium aluminide, was analysed. This material class exhibits a pronounced R-curve behaviour, which is mainly caused by the formation of shear ligaments, crack deflection and branching. Samples with short cracks on deep sharp notches were subjected to overloads of 80 % of the fracture toughness. Contrary to ductile materials, the experiments revealed no significant increase in the long-crack threshold, however a pronounced increase in the slope of the R-curve for the threshold of stress intensity range.
Details
Original language | English |
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Article number | 107083 |
Number of pages | 8 |
Journal | International Journal of Fatigue |
Volume | 163.2022 |
Issue number | October |
Early online date | 23 Jun 2022 |
DOIs | |
Publication status | Published - Oct 2022 |