Accession Number : AD0774827

Title :   Investigation of Solidification of High Strength Steel.

Descriptive Note : Final rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF METALLURGY AND MATERIALS SCIENCE

Personal Author(s) : Fascetta,E. F. ; Kattamis,T. Z. ; Mehrabian,R. ; Flemings,M. C.

Report Date : DEC 1973

Pagination or Media Count : 85

Abstract : THE CHILL AND INCREASING HOMOGENIZATION TIME, WHEREAS THE MANGANESE CONTENT EXHIBITS THE INVERSE VARIATION. Nickel and molybdenum remained unchanged. The effect of geometrical and compositional variations of sulfides during thermomechanical treatment on mechanical behavior was evaluated. An apparatus for rheocasting high temperature alloys in a vacuum or inert atmosphere was constructed. Cu10%Sn and Fe-3%C-4%Si alloys were successfully rheocast. The size and shape of the primary solid particles at .4 to .5 fraction solid after the first 30 minutes of mixing in the mushy zone are not influenced by the solidification path followed. In both alloys studied, the primary solid particles at .4 and .5 fraction solid were 350 micrometers to 700 micrometers in size, and spheroidal in shape. The thixotropic nature of the rheocast Cu-10%Sn samples when reheated and sheared suggests the possibility of thixocasting the alloy. (Modified author abstract)

Descriptors :   *Steel, *Solidification, Microstructure, Mechanical properties, Iron, Hardness, Copper alloys, Tin alloys, Iron alloys, Carbon alloys, Silicon alloys

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE