A13-TYPE PHASE REVEALED IN RAPIDLY SOLIDIFIED HIGH-CARBON IRON ALLOY

Iron-based alloys, when rapidly solidified, can contain phases, such as austenite, ε phase, X phase, amorphous phase, etc. The ε phase, which is reported by Ruhl and Cohen,1 has a hexagonal close-packed structure and contains a large amount of carbon in solution. The X phase, as well as the E phase, is a nonequilibrium phase and has a cubic structure.2.3.4 The authors5 showed that the Cr-Mo iron alloy with a rather high carbon content of 4.4 pet exhibits the amorphous phase. Thus, rapidly solidified iron alloys reveal many different phases. In the present work, we report that an unknown phase was revealed in a Cr-Mo iron alloy with a lower level of carbon than that reported previously.5 © 1975, American Society for Metals, The Melallurgical Society of AIME. All rights reserved.