Grain Refining and Microstructural Modification during Solidification.
Abstract
The objective of the program is to study grain refining and microstructural modification during solidification, as affected by supercooling, the solidification rate, and/or inoculation. The experimental technique consists of using an electromagnetic levitation technique to melt one gram samples, followed by rapid solidification of the superheated or supercooled sample in a quenchant. The research activities so far have been concentrated in the following areas: (1) grain refining via peritectic reaction in Cu-Fe alloys, (2) microstructure and solute distribution in highly-supercooled Fe-Ni alloys, and (3) supercooling and microstructure of Cr, Ni and Cr-Ni alloys. For Cu-Fe alloys, it has been observed that the addition of iron progressively reduces the grain size of the copper in alloys up to 2.8 w/o Fe, the minimum concentration necessary for the peritectic reaction. In the hyperperitectic alloys, where iron is the primary phase, increasing the iron concentration does not seem to influence the grain size appreciably. However, the cooling rate through the solid-liquid range above the peritectic temperature and coarsening of primary iron particles seem to have a major effect on the grain size.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1982
- Accession Number
- ADA120770
Entities
People
- G. J. Abbaschian
Organizations
- University of Florida