RT Journal Article
T1 Influence of the level of damage on the high temperature fatigue life of an aircraft turbine disc
A1 Silveira, E.
A1 Atxaga, G.
A1 Irisarri, A. M.
AB This paper analyses the effect induced by those scratches produced during the handling and mounting of an aircraft turbine disc on their fatigue life. Fatigue tests were performed at 300 and 600 °C on specimens without and with various levels of damage. At 600 °C, an inverse relationship between the depth of the scratches and the fatigue life was found. However, at 300 °C no effect of these scratches on fatigue life was detected, obtaining very similar results in all of them. Examination of the failed specimens revealed that failure originated away from the scratch. Measurement of residual stresses helps to find an explanation to this apparently anomalous behaviour. It was observed that machining of the specimens induced high tensile residual stresses. At 600 °C, these stresses are relieved and failure at the scratched zone is promoted.
SN 1350-6307
YR 2009
FD 2009-03
LK https://hdl.handle.net/11556/3091
UL https://hdl.handle.net/11556/3091
LA eng
NO Silveira , E , Atxaga , G & Irisarri , A M 2009 , ' Influence of the level of damage on the high temperature fatigue life of an aircraft turbine disc ' , Engineering Failure Analysis , vol. 16 , no. 2 , pp. 578-584 . https://doi.org/10.1016/j.engfailanal.2008.02.012
NO This paper has been extracted from the results obtained in the Brite – Euram Project 95 – 1612 funded by the European Commission which is gratefully acknowledged. Moreover, the authors wish to thank the Spanish Ministerio de Ciencia y Tecnología for the help and assistance to the Project MAR 97 – 1644 – CE.
DS TECNALIA Publications
RD 31 jul 2024