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The creep behaviour of an Fe-40Al alloy containing Y 2 O 3 particles has been analysed combining microstructural information and experimental data obtained from mechanical tests. The creep strength of the alloy is controlled by the dislocation-particle attractive interactions. At 500 o C the dislocation overcomes the dispersoid particles by a detachment-controlled process while...
Dislocation pinning processes have been examined by studying strain-ageing effects in a range of γ-TiAl alloys. The yield stress increase after static strain ageing is shown to depend on the prior strain imposed before the ageing step and the time and temperature of ageing, as well as on the chemical composition of the material considered. For carbon-containing alloys very strong ageing effects are...
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