Effect of a single overload on the cyclic R-curve behaviour of a γ-TiAl TNM alloy
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in: International Journal of Fatigue, Jahrgang 163.2022, Nr. October, 107083, 10.2022.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Effect of a single overload on the cyclic R-curve behaviour of a γ-TiAl TNM alloy
AU - Lintner, Arthur
AU - Pippan, Reinhard
AU - Schloffer, Martin
AU - Hohenwarter, Anton
N1 - Publisher Copyright: © 2022 The Authors
PY - 2022/10
Y1 - 2022/10
N2 - 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.
AB - 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.
KW - Fatigue threshold
KW - Overload
KW - R-curve
KW - Titanium aluminide
UR - http://www.scopus.com/inward/record.url?scp=85132729142&partnerID=8YFLogxK
U2 - 10.1016/j.ijfatigue.2022.107083
DO - 10.1016/j.ijfatigue.2022.107083
M3 - Article
AN - SCOPUS:85132729142
VL - 163.2022
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
IS - October
M1 - 107083
ER -