论文信息 - Room Temperature Tensile Ductility in Polycrystalline B2 NiAl

Room Temperature Tensile Ductility in Polycrystalline B2 NiAl

Binary polycrystalline alloys of B2 NiAl, ranging from 47 to 51.5 at% Al, were prepared by casting and extrusion. These were tested in tension at temperatures ranging from 300 K to 873 K. Significant tensile ductility is observed in the near-stoichiometric alloy at room temperature as well as at 473 K in spite of the presence of only dislocations. This anomaly appears to be related to the recrystallized texture, to the lower yield strength and to the presence of residual dislocations at grain boundaries in this alloy.

B. Boulogne | K. Vedula | K. Hahn

[1] D. R. Barker,et al. A brittle to ductile transition in NiAl of a critical grain size , 1983 .

[2] M. Loretto,et al. The plastic deformation of NiAl single crystals between 300°K and 1050°K: I. Experimental evidence on the role of kinking and uniform deformation in crystals compressed along ⟨001⟩ , 1973 .

[3] P. Strutt,et al. The orientation dependence of deformation mode and structure in stoichiometric NiAl single crystals deformed by high temperature steady-state creep , 1973 .

[4] M. Loretto,et al. Slip systems in NiAl single crystals at 300°K and 77°K , 1971 .

[5] D. Cockayne,et al. The weak-beam technique applied to superlattice dislocations in an iron—aluminium alloy , 1970 .

[6] R. T. Pascoe,et al. The Mechanical Behaviour of the Intermediate Phase NiAl , 1968 .

[7] R. T. Pascoe,et al. Deformation Modes of the Intermediate Phase NiAl , 1968 .

[8] A. Ball,et al. The operative slip system and general plasticity of NiAl-II , 1966 .

[9] A. Ball,et al. The deformation properties and electron microscopy studies of the intermetallic compound NiAl , 1966 .