IMPROVEMENT OF DUCTILITY AND TOUGHNESS OF Ni-RICH NiAl AT ROOM TEMPERATURE

Abstract

Abstract: In rapidly solidified Ni-34.6 at-% Al alloy,when the cooling the rate during solidification reached the order of 10~6 K/s,the size of the microstructures,such as the grains and substructure of the martensite,decreased dramatically.The various kinds of interfaces with high density and homogeneous distribution resisted effectively the propagation of the cracks and resulted in localized plastic deformation ahead of the tips of microcracks.The ductility and toughness at room temperature of the Ni-rich NiAl may be improved considerably.

Key words: NiAl, rapid solidification, ductility, toughness

CHENG Tianyi Beijing Institute of Technology,Beijing,ChinaCANTORB University of Oxford,UKMcLEANM FLOWERHM Imperial College,UK CHENG Tianyi,associate professor,Faculty of Metallography,Beijing Institute of Technology,Beijing 100081,China. IMPROVEMENT OF DUCTILITY AND TOUGHNESS OF Ni-RICH NiAl AT ROOM TEMPERATURE[J]. Acta Metallurgica Sinica (English Letters), 1993, 6(5): 296-299.

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IMPROVEMENT OF DUCTILITY AND TOUGHNESS OF Ni-RICH NiAl AT ROOM TEMPERATURE

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