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Mechanical properties of cellular solids produced from hollow stainless steel spheres

DSpace at IIT Bombay

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Title Mechanical properties of cellular solids produced from hollow stainless steel spheres
 
Creator ROY, S
WANNER, A
BECK, T
STUDNITZKY, T
STEPHANI, G
 
Subject ALUMINUM FOAM
METAL FOAMS
BEHAVIOR
 
Description Mechanical properties of cellular hollow sphere structures are studied in this work. The material was fabricated by coating the metallic powder slurry on expanded polystyrol (EPS) spheres, drying, forming under compression, debinding, and final sintering of the spheres to each other. Longitudinal elastic wave velocities were measured using ultrasound phase spectroscopy while compression tests were carried out up to a homologous temperature of 0.6. Dependence of the relative Young's modulus on the relative density is similar to conventional open-cell foams. Compression stress-strain plots show the three stages of elastic deformation, plateau, and densification. With increasing temperature the overall level of the compressive stress-strain plots shifts to lower stresses. The hollow sphere solids show slightly better high temperature strength in comparison to the base metal. However, due to the considerable scatter in the experimental data points, this improvement seems to be insignificant. Structural observations on samples deformed to within the plateau region clearly show the heterogeneous progress of deformation.
 
Publisher SPRINGER
 
Date 2012-06-26T05:27:24Z
2012-06-26T05:27:24Z
2011
 
Type Article
 
Identifier JOURNAL OF MATERIALS SCIENCE,46(16)5519-5526
0022-2461
http://dx.doi.org/10.1007/s10853-011-5496-6
http://dspace.library.iitb.ac.in/jspui/handle/100/13967
 
Language English