Accession Number : ADA193288

Title :   Effects of Hafnium Additions on the Solidification Behavior of Directionally Solidified Superalloys.

Descriptive Note : Final rept. 1 Jun 75-31 Aug 77,

Corporate Author : PITTSBURGH UNIV PA DEPT OF METALLURGICAL AND MATERIALS ENGINEERING

Personal Author(s) : Brody, Harold D ; Giamei, Anthony F

PDF Url : ADA193288

Report Date : Oct 1981

Pagination or Media Count : 175

Abstract : A cooperative university/industry research program into the effect of hafnium additions on the solidification behavior of nickel base superalloys has been carried out under Air Force sponsorship at the University of Pittsburgh and Pratt and Whitney Aircraft Company. The research was aimed at gaining a fundamental understanding of the basic solidification characteristics, i.e., development of structure and segregation, of hafnium modified MAR-M200 over the normal range of casting conditions and for a reasonable variation in alloy content, especially hafnium content. Keywords: Solidification, Macrosegregation, Microsegregation, Nickel base alloys, Vacuum metallurgy, Hafnium, Dendrite spacing, Superalloys, Cast structure, Directional solidification, Investment casting, Process models, Chill casting.

Descriptors :   *HAFNIUM, *NICKEL ALLOYS, *SOLIDIFICATION, *SUPERALLOYS, ADDITION, AIRCRAFT INDUSTRY, CASTING, CASTINGS, COOLING, DENDRITIC STRUCTURE, DIRECTIONAL, INVESTMENT CASTING, METALLURGY, VACUUM, SEGREGATION(METALLURGY)

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE