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

金属学报(英文版), 1993, 6(5): 296-299.

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

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

Keywords： NiAl , null , null , null

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.

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

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