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Kovove materialy - Metallic Materials,
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alloy structure metallic propert
Ni3Al
β
|
Microstructure, hardness, room-temperature tensile properties, high-temperature compressive properties, and creep of two directionally solidified and annealed multiphase intermetallic alloys with chemical composition Ni-21.7Al-7.5Cr-6.5Ti and Ni-20.2Al-8.2Cr-2.4Fe [at.%] were studied. The microstructure of both as-grown alloys consisted of γ' (Ni3Al)-phase, γ-phase (Ni-based solid solution), β (NiAl)-phase and α-Cr precipitates. Microstructural changes observed during annealing significantly increased room-temperature yield stress of the alloy with addition of Ti and ductility of the alloy with addition of Fe.