STP430: Effect of Carbon Content on Transformation Structures of lron-22 Per Cent Nickel Alloys

    Mihalisin, J. R.
    Research Laboratory, The International Nickel Co., Inc., Suffern, N.Y.

    Pages: 12    Published: Jan 1968


    The structures of iron-22 per cent nickel alloys with carbon contents ranging from 0.007 to 0.14 per cent were studied by light and transmission electron microscopy. As the carbon content increased, the structures changed from random dislocation type to plate type with subcells. At the higher carbon levels, twinning was observed. A discontinuous increase in hardness with carbon content was noted which coincided with the onset of a well developed plate structure with sub-cells. Twinning appeared to have no significant effect upon hardness.


    carbon, transformation (metallurgical), microstructure, metallography, iron-nickel alloys, martensite, electron microscopy

    Paper ID: STP41824S

    Committee/Subcommittee: E04.03

    DOI: 10.1520/STP41824S

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