Fatigue crack propagation behaviour of a lamellar tial alloy

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作者
Mabru, C
Henaff, G
Petit, J
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TH [机械、仪表工业];
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0802 ;
摘要
In the present study, the fatigue crack growth behaviour of a quaternary TiAl based alloy has been investigated. The influence of microstructure has been analysed by considering two different microstructures: a nearly fully gamma microstructure and a nearly fully lamellar one. Crack closure effects have been taken into account in this analysis. Thus the influence of temperature on the intrinsic fatigue behaviour (i.e. without any closure or environmental effect) has been examined. In addition, the fatigue resistance has been shown to be strongly lessened in ambient air and this effect has been related to the presence of moisture.
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页码:1187 / 1192
页数:6
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