Accession Number : AD0612270

Title :   CYCLIC SINTERING OF METALS.

Descriptive Note : Technical research article,

Corporate Author : FRANKFORD ARSENAL PHILADELPHIA PA RESEARCH AND DEVELOPMENT DIRECTORATE

Personal Author(s) : Powell,Robert A.

Report Date : 29 APR 1964

Pagination or Media Count : 12

Abstract : A recent publication indicated that a thermal cyclic sintering treatment for titanium compacts greatly increased the final density. This observation was made in the course of experiments involving dilatometric measurements made during the thermal cycling of compacts of nickel, copper, titanium, and molybdenum powders. It was believed that the improved densification was a result of thermal cycling above thhe below the transformation temperature (1607F) for titanium. To substantiate this hypothesis, experimentation was conducted on metals which exhibit allotropic transformation; titanium, iron, and cobalt were selected as the model materials. Comparisons are made in the properties achieved through isothermal and thermal cycling sintering treatments. This study substantiated reported results; however, thermal cycling above and below the transformation temperatures provided no improvements in properties nor engineering advantages over conventional isothermal sintering. (Author)

Descriptors :   (*SINTERING, POWDER METALLURGY), (*POWDER METALLURGY, SINTERING), POWDER METALS, IRON, COBALT, TITANIUM, DENSITY, TRANSITION TEMPERATURE, TENSILE PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE