Linking Surface Precipitation in Fe-Au Alloys to Its Self-healing Potential During Creep Loading
W. W. Sun (Monash University)
H. Fang (TU Delft - Novel Aerospace Materials)
Niels Harmen H. Dijk (TU Delft - RST/Fundamental Aspects of Materials and Energy)
S Van der ZWAAG (TU Delft - Novel Aerospace Materials)
Christopher R. Hutchinson (Monash University)
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Abstract
The precipitation of Au-rich precipitates on the external surfaces of Fe-Au alloys has been studied by scanning and transmission electron microscopy. The surface precipitates formed at elevated temperatures are found to self-organize in regular patterns and their growth rate is determined quantitatively. The observed surface precipitation at a free surface is compared to the precipitation at the internal surface of grain boundary cavities induced by creep loading. A close agreement between both processes is observed.
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