Effect of porosity, density and temperature on microstructure and mechanical behavior of hybrid premix sponge ferrous compact

This study on hybrid premix sponge ferrous sintered materials is focused on its mechanical properties and microstructure with respect to the amount of porosity. The pressure of 430 MPa and sintering temperatures 1090?C, 1115?C, and 1130?C in a Nitrogen atmosphere for an hour is followed to produce t...

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Bibliographic Details
Published in:Science of sintering 2017, Vol.49 (2), p.187-196
Main Authors: Perianayagam, Philomen, Kichenaradjao, Palaniradja, Alluru, Gopalakrishna
Format: Article
Language:English
Subjects:
Carbon
Copper
Crush tests
density
Dimensional changes
Engineering
hardness
Lubricants & lubrication
Materials science
Mechanical properties
Microstructure
Optical microscopy
Pore formation
Porosity
Powder metallurgy
Scanning electron microscopy
Sintering
Studies
Surface analysis (chemical)
Tensile strength
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Summary:This study on hybrid premix sponge ferrous sintered materials is focused on its mechanical properties and microstructure with respect to the amount of porosity. The pressure of 430 MPa and sintering temperatures 1090?C, 1115?C, and 1130?C in a Nitrogen atmosphere for an hour is followed to produce this hybrid premix sponge ferrous compact. Radial crush strength, dimensional change and micro hardness test were performed on these samples to determine the mechanical properties. Scanning electron microscope (SEM) was used for fractured surface analysis, while light optical microscopy (LOM) is used to study the structure and pore formation. The study infers, as porosity percentage increased, tendency of irregular pore formation increased with simultaneous decrease in mechanical properties of the sample. Temperature of sintering has a vital role in decreasing the porosity of powder materials. nema
ISSN:0350-820X
1820-7413
DOI:10.2298/SOS1702187P