ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The effect of supercooled microstructures and composition in the solid state transformation of the Fe-Ni system was investigated utilizing transmission electron microscopy (TEM), and scanning electron microscopy (SEM). Irrespective of the supercooling degree, Fe-Ni samples containing between 7 and 28 wt % Ni underwent a martensitic transformation above room temperature. The martensite morphology is superimposed on the sub-grain microstructure obtained by supercooling. Indications exist that alternative nucleation is activated if the samples are supercooled below the δ-T0 curve. The impact of alternative nucleation on the martensitic transformation is discussed. Coherent precipitation was observed in Fe-33 wt % Ni alloys. The precipitate dimensions depend on the solidification path. The results are discussed in terms of current supercooling theories.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01143213
