Mississippi State University
Date of Degree
Graduate Thesis - Open Access
Master of Science
James Worth Bagley College of Engineering
Department of Mechanical Engineering
To produce crack free powder compacts with desirable mechanical properties and uniform densities, a predictive finite element simulation of the powder metallurgy process is necessary (compaction and sintering). The finite element method, through the use of appropriate constitutive material models captures the microstructure-property history after compaction and sintering. A FC-0205 cylinder and FC-0208 automotive main bearing cap were compacted to investigate the microstructure changes at different locations within the parts. Measurements of the pore volume fraction, pore size, pore nearest neighbor, pore aspect ratio, and grain size were performed after compaction for the cylinder after compaction and after compaction and sintering for the MBC. An image analysis methodology was created to measure density in the main bearing cap, and to validate future model results. A comparison between the image analysis and the Archimedes immersion methods demonstrated the reliability of the methods.
Tucker, Laura Arias, "Microstructure-Property Relations Throughout The Powder Metallurgy Process" (2007). Theses and Dissertations. 3100.