TENSILE PROPERTIES AND CREEP RESISTANCE OF Fe_3Al-BASED ALLOYS CONTAINING NIOBIUM

Abstract

Abstract: Small amount(0.5-0.8at.%) of niobium addition to the multicomponent alloys based on Fe3Al(Fe-28Al-5Cr-0.5Mo-0.05Zr-0.05B-0.1Ce) results in the microstructural refinement and the increase in the yield strength at temperatures up to 600℃,but is not beneficial to room temperature ductility.Results of microanalysis indicate that the addition of niobium causes the formation of precipitates with complex compositions which strengthen both matrix and grain boundaries and enhance the creep resistance of the alloys.

Key words: Fe_3Al, Nb, tensile property, creep

ZHANG Zhonghua;SUN Yangshan;GUO Jun(Department of Materials Science and Engineering, Southeast University, Nanjing 210096,China). TENSILE PROPERTIES AND CREEP RESISTANCE OF Fe_3Al-BASED ALLOYS CONTAINING NIOBIUM[J]. Acta Metallurgica Sinica (English Letters), 1996, 9(2): 135-139.

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TENSILE PROPERTIES AND CREEP RESISTANCE OF Fe_3Al-BASED ALLOYS CONTAINING NIOBIUM

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