Field-ion microscopy of an alloy steel

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Abstract
This note reports some preliminary results of a combined field-ion microscope and electron microscope study of a pure iron alloy containing 2 wt. % vanadium and 0·2 wt. % carbon. After isothermal transformation particles of vanadium carbide are formed with a size and distribution which depends on the heat treatment conditions. A course particle microstructure was used to determine the nature of the field-ion image from these carbides and the study was then directed at samples which were heat treated to produce a microstructure on a finer scale where the amount of information which could be obtained from the electron microscope was slight. This note reports some preliminary results of a combined field-ion microscope and electron microscope study of a pure iron alloy containing 2 wt. % vanadium and 0·2 wt. % carbon. After isothermal transformation particles of vanadium carbide are formed with a size and distribution which depends on the heat treatment conditions. A course particle microstructure was used to determine the nature of the field-ion image from these carbides and the study was then directed at samples which were heat treated to produce a microstructure on a finer scale where the amount of information which could be obtained from the electron microscope was slight.

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