국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Effect of Microstructural Parameters on the Relative Densities of Metal Foams
저자	Raj, S. V.;; Kerr, Jacob A.
Keyword	METAL FOAMS;; MICROSTRUCTURE;; PHENOMENOLOGY;; POROSITY;; QUANTITATIVE ANALYSIS;; SHAPES;; SHRINKAGE;; SIZE (DIMENSIONS)
URL	http://hdl.handle.net/2060/20110000504
보고서번호	NASA/TM-2010-216797
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A detailed quantitative microstructural analyses of primarily open cell FeCrAlY and 314 stainless steel metal foams with different relative densities and pores per inch (p.p.i.) were undertaken in the present investigation to determine the effect of microstructural parameters on the relative densities of metal foams. Several elements of the microstructure, such as longitudinal and transverse cell sizes, cell areas and perimeters, ligament dimensions, cell shapes and volume fractions of closed and open cells, were measured. The cross-sections of the foam ligaments showed a large number of shrinkage cavities, and their circularity factors and average sizes were determined. The volume fractions of closed cells increased linearly with increasing relative density. In contrast, the volume fractions of the open cells and ligaments decreased with increasing relative density. The relative densities and p.p.i. were not significantly dependent on cell size, cell perimeter and ligament dimensions within the limits of experimental scatter. A phenomenological model is proposed to rationalize the present microstructural observations.