Accession Number : AD0656622

Title :   STRENGTH OF SINTERED FERROUS PARTS WITH INTERCONNECTED POROSITY.

Descriptive Note : Summary rept. 1 Jul 66-29 Jun 67.

Corporate Author : IIT RESEARCH INST CHICAGO ILL

Report Date : 27 JUL 1967

Pagination or Media Count : 89

Abstract : A study of nine independent variables contributing to physical properties in sintered porous ferrous parts was made. A statistically designed experiment was utilized and the data analyzed through a computer program; an electrosketch attachment to the computer was used to obtain graphical presentation of the results. It was possible through proper combination of variables to obtain an ultimate tensile strength of 24,600 psi and 7% elongation in a specimen with 25% porosity and 19,600 psi UTS and 9% elongation in a specimen with 30% porosity. The most significant factors affecting ultimate tensile strength and elongation are shape, density, sintering temperature and time, and pressing rate. In addition, sintering atmosphere has a strong influence on elongation alone. Dimensional change is most significantly affected by sintering temperature, time and atmosphere, particle shape, and pressing rate. (Author)

Descriptors :   (*SINTERING, *IRON), (*POWDER METALS, *PHYSICAL PROPERTIES), FRACTURE(MECHANICS), HARDNESS, TENSILE PROPERTIES, COMPACTING, DENSITY, PRESSURE, GRAIN SIZE, POROSITY, COMPUTER PROGRAMS, OXYGEN, TEMPERATURE, ELONGATION, PHOTOGRAPHS

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE