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The powder particle size, D , influences the creep behaviour of Al-Cr-Zr alloys. The alloy studied in this work, Al-5Cr-2Zr (mass %), was prepared by argon atomization. Three size fractions of powder particles were selected: 25-50 μm, 50-100 μm and 100-200 μm in diameter. They were Consolidated by extrusion. Independently of D , the flow behaviour of the alloy can be described by the power law equation. As test temperature increases, the stress exponent n decreases up to a value close to 5. A decrease of D causes an increase of n and delays the alloy degradation at high temperature.

Deformación a altas temperaturas de la aleación Al-5Cr-2Zr en función del tamaño de partícula de polvo