THE PERITECTIC REACTION IN Fe-Co ALLOYS

摘要

Recent work by Professor Kurz along with Dr. Sumida studied the directional solidification of Fe-Co peritectic alloys in order to re-evaluate the Fe-rich part of the phase diagram. Comparing the results of Thermocalc modeling to those of Harris and Hume-Rothery, Kurz and Sumida found that there was a significant difference and a new phase diagram, based on experiments completed with a Bridgmann apparatus, was suggested. Using the Confocal Scanning Laser Microscope (CSLM) at Carnegie Mellon University, an investigation of the solidus and liquidus temperatures for hyperperitectic Fe-Co was performed and the results compared with those of Kurz and Sumida. Also, the rate of austenite formation and growth along the delta-ferrite/liquid boundary was measured and compared to past CSLM observations for Fe-Ni.