Development of a computer model of dendritic microsegregation for use with multicomponent steels

✍ Scribed by Howe, A. A.

• Publisher: Springer
• Year: 1987
• Tongue: English
• Weight: 377 KB
• Volume: 44
• Category: Article
• ISSN: 0003-6994
• DOI: 10.1007/bf00412006

✦ Synopsis

Progress is reported in the development of a computer program for moddling the process of microsegregation in multicomponent steels. The program is based on the single phase binary and ternary models described in the previous paper by Ogilvy and Kirkwood but has been extended to consider general, multicomponent alloys. The cooling rate required in the program formulation is currently determined according to a constant, set rate of heat extraction, but any, independently derivable rule could be employed. The peritectic reaction from ferritic to austenitic solidification encountered in a great many steels has been included in the formulation with the relevant, three-phase compositions decreed in pseudo-binary fashion by appropriate carbon equivalents. The onset of the austenite-cementite eutectic is similarly described. Manganese sulphide precipitation is described by removal of the elements from the residual liquid in appropriate ratio so as not to exceed a prescribed solubility product. Such devices can be fashioned similarly for other phase and precipitate developments as required.